Pub Date : 2021-04-03DOI: 10.1080/0371750X.2021.1887765
S. Manivannan, P. Biswas, P. Barick, S. Kumari, B. Saha, Roy Johnson
Commercially procured magnesium aluminate (MgAl2O4) spinel powder with average particle size of 300 nm and irregular morphology were spray and freeze granulated. The granules were characterized for the texture, strength, granule size and its distribution. In order to evaluate the flowability of granules, rheological parameters, such as Carr index and Hausner ratio were measured. The granules were further subjected to quasi-static compaction under loading, unloading conditions and compaction curves were constructed. Compaction coefficients thus obtained were correlated with granulation conditions and other parameters including green densities. Compacted green samples were also subjected to flexural strength measurements following ASTM standards and fractographs were observed under FESEM. A Carr index of 13.7 and Hausner ratio of 1.16 were obtained for freeze dried granules indicating the superiority in flow behavior as compared to its spray granulated counterpart, thereby showing a better compaction behavior: compaction coefficient of 5.9 in combination with higher true and predicted green density values and lower granule strength of 1.22 MPa. The green samples exhibited a flexural strength of 11 and 12.5 MPa and compressive strength of 2.44 and 1.22 MPa for spray and freeze granulated sample, respectively. The above observations were also complemented by the fractographs. GRAPHICAL ABSTRACT
{"title":"Comparative Study on Compaction and Sintering Behavior of Spray and Freeze Granulated Magnesium Aluminate Spinel Powder","authors":"S. Manivannan, P. Biswas, P. Barick, S. Kumari, B. Saha, Roy Johnson","doi":"10.1080/0371750X.2021.1887765","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1887765","url":null,"abstract":"Commercially procured magnesium aluminate (MgAl2O4) spinel powder with average particle size of 300 nm and irregular morphology were spray and freeze granulated. The granules were characterized for the texture, strength, granule size and its distribution. In order to evaluate the flowability of granules, rheological parameters, such as Carr index and Hausner ratio were measured. The granules were further subjected to quasi-static compaction under loading, unloading conditions and compaction curves were constructed. Compaction coefficients thus obtained were correlated with granulation conditions and other parameters including green densities. Compacted green samples were also subjected to flexural strength measurements following ASTM standards and fractographs were observed under FESEM. A Carr index of 13.7 and Hausner ratio of 1.16 were obtained for freeze dried granules indicating the superiority in flow behavior as compared to its spray granulated counterpart, thereby showing a better compaction behavior: compaction coefficient of 5.9 in combination with higher true and predicted green density values and lower granule strength of 1.22 MPa. The green samples exhibited a flexural strength of 11 and 12.5 MPa and compressive strength of 2.44 and 1.22 MPa for spray and freeze granulated sample, respectively. The above observations were also complemented by the fractographs. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"110 - 117"},"PeriodicalIF":1.2,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1887765","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46450337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/0371750X.2021.1904289
Revathi Kottappara, S. Palantavida, B. Vijayan
In the present study, we report the development of morphologically different copper and Cu(OH)2-Cu2O nanostructures by a single step chemical reduction method using ascorbic acid as environmental friendly reducing agent. Morphology and crystallographic patterns of the synthesized samples were analyzed using X-ray diffraction and scanning electron microscopy. Determination of catalytic performance of both copper and Cu(OH)2-Cu2O nanostructure towards hydrogenation reduction of para nitrophenol and para nitroaniline using sodium borohydride as the reducing agent suggested that Cu(OH)2-Cu2O nanostructure is comparatively efficient in hydrogenating the nitro aromatic compounds. The improved hydrogenation capacity was suggested to be due to the formation of an in-situ composite of Cu2O-Cu during the time of reduction reaction. Analysis on the degradation capacity of developed samples for methyl orange degradation using sodium borohydride as the reducing agent indicated significantly high reduction rate for Cu(OH)2-Cu2O nanostructure with a rate constant value of 0. 819 min-1, which is higher than many of the previously reported values. GRAPHICAL ABSTRACT
{"title":"A Facile Synthetic Approach for Cu(OH)2-Cu2O Heterostructure: A Stable Catalyst for Pollutant Degradation","authors":"Revathi Kottappara, S. Palantavida, B. Vijayan","doi":"10.1080/0371750X.2021.1904289","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1904289","url":null,"abstract":"In the present study, we report the development of morphologically different copper and Cu(OH)2-Cu2O nanostructures by a single step chemical reduction method using ascorbic acid as environmental friendly reducing agent. Morphology and crystallographic patterns of the synthesized samples were analyzed using X-ray diffraction and scanning electron microscopy. Determination of catalytic performance of both copper and Cu(OH)2-Cu2O nanostructure towards hydrogenation reduction of para nitrophenol and para nitroaniline using sodium borohydride as the reducing agent suggested that Cu(OH)2-Cu2O nanostructure is comparatively efficient in hydrogenating the nitro aromatic compounds. The improved hydrogenation capacity was suggested to be due to the formation of an in-situ composite of Cu2O-Cu during the time of reduction reaction. Analysis on the degradation capacity of developed samples for methyl orange degradation using sodium borohydride as the reducing agent indicated significantly high reduction rate for Cu(OH)2-Cu2O nanostructure with a rate constant value of 0. 819 min-1, which is higher than many of the previously reported values. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"118 - 126"},"PeriodicalIF":1.2,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1904289","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47273918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/0371750X.2021.1888806
A. Ashokbabu, P. Thomas
Materials with high dielectric permittivity are in demand due to their potential applications in microelectronics, capacitors and related fields. Polymer/ceramic composites, due to their improved properties, can be studied to meet this demand. In this work, high permittivity double perovskite Sr2TiMnO6 (STMO) ceramics were synthesized by solid state reaction route and polystyrene (PS) composite thick films (∼200 μm) with up to 50 vol% loading of STMO were prepared by solution casting technique. The composite films were characterized using X-ray diffraction and Fourier transform infra-red spectroscopy for their structural properties. Microstructure of the composites was examined using scanning electron microscopy. Thermal behavior was studied using differential scanning calorimetry and thermo-gravimetric analysis. Dielectric properties, such as permittivity, loss and AC conductivity were measured using a dielectric impedance analyzer. Permittivity and dielectric loss of the base polymer were found to increase with the addition of STMO. Glass transition for composites shifted to higher temperature than that of pure PS. The composites exhibited enhanced thermal stability and these composite films can be explored as dielectric materials for capacitor applications. GRAPHICAL ABSTRACT
{"title":"Dielectric and Thermal Behavior of Polystyrene/Sr2TiMnO6 (STMO) Composites","authors":"A. Ashokbabu, P. Thomas","doi":"10.1080/0371750X.2021.1888806","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1888806","url":null,"abstract":"Materials with high dielectric permittivity are in demand due to their potential applications in microelectronics, capacitors and related fields. Polymer/ceramic composites, due to their improved properties, can be studied to meet this demand. In this work, high permittivity double perovskite Sr2TiMnO6 (STMO) ceramics were synthesized by solid state reaction route and polystyrene (PS) composite thick films (∼200 μm) with up to 50 vol% loading of STMO were prepared by solution casting technique. The composite films were characterized using X-ray diffraction and Fourier transform infra-red spectroscopy for their structural properties. Microstructure of the composites was examined using scanning electron microscopy. Thermal behavior was studied using differential scanning calorimetry and thermo-gravimetric analysis. Dielectric properties, such as permittivity, loss and AC conductivity were measured using a dielectric impedance analyzer. Permittivity and dielectric loss of the base polymer were found to increase with the addition of STMO. Glass transition for composites shifted to higher temperature than that of pure PS. The composites exhibited enhanced thermal stability and these composite films can be explored as dielectric materials for capacitor applications. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"96 - 102"},"PeriodicalIF":1.2,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1888806","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45927990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/0371750X.2021.1904290
S. K. Dehury, Deeptimayee Khatua, R. Choudhary, P. Achary
A lead-free multiferroic double perovskite BiHoNiTiO6 (BHNT) was prepared at high temperature following mixed oxide solid state reaction mechanism. Structural evaluation by X-ray diffractogram suggested monoclinic crystal system for the BHNT. SEM images showed homogeneous morphology with almost similar and uniform grain distribution. The compound possessed low value of tanδ even at a high temperature (400oC) at 100 kHz. Evaluation of the dielectric and electrical plots with frequency and temperature obtained from the impedance spectroscopy revealed that the contributions of grains, grain boundaries and electrode has profound effect on the above properties. These plots are very much helpful to understand the conduction mechanism and microstructure characteristics of the electronic material. The experimental real and imaginary impedance data were modelled by designing an equivalent circuit with the capacitance and resistance parameter. The transport characteristics like σac (ac conductivity), electrical modulus and magneto-electric effect of the material were also reported in this paper. GRAPHICAL ABSTRACT
{"title":"Electrical and Dielectric Characterization of Bismuth Holmium Nickel Titanate (BiHoNiTiO6)","authors":"S. K. Dehury, Deeptimayee Khatua, R. Choudhary, P. Achary","doi":"10.1080/0371750X.2021.1904290","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1904290","url":null,"abstract":"A lead-free multiferroic double perovskite BiHoNiTiO6 (BHNT) was prepared at high temperature following mixed oxide solid state reaction mechanism. Structural evaluation by X-ray diffractogram suggested monoclinic crystal system for the BHNT. SEM images showed homogeneous morphology with almost similar and uniform grain distribution. The compound possessed low value of tanδ even at a high temperature (400oC) at 100 kHz. Evaluation of the dielectric and electrical plots with frequency and temperature obtained from the impedance spectroscopy revealed that the contributions of grains, grain boundaries and electrode has profound effect on the above properties. These plots are very much helpful to understand the conduction mechanism and microstructure characteristics of the electronic material. The experimental real and imaginary impedance data were modelled by designing an equivalent circuit with the capacitance and resistance parameter. The transport characteristics like σac (ac conductivity), electrical modulus and magneto-electric effect of the material were also reported in this paper. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"135 - 141"},"PeriodicalIF":1.2,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1904290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44718732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/0371750X.2021.1880969
Ayesha Raza, Muhammad Fahad Yousaf, S. Farrukh, A. Hussain
The aim of this work is to study the effect of membrane thickness with respect to gas permeance and tensile strength. The influence of membrane thickness on gas permeation has received little attention to date. Single layer flat sheet membrane with average thickness of 25 μm and dual layer composite membranes with variable thickness of skin layer were fabricated by coating CA/ PEG selective layer on the polyvinylidene fluoride porous support. Permeation experiments were performed with CO2 and CH4 which revealed that permeance of CO2 was pronounced compared to CH4. Highest permeance of 0.87 gas permeation unit (GPU) was obtained at 4 bar with 19.4 μm skin layer. Fourier transform infra-red spectroscopy was used to study the existence of different functional groups in the membranes. Strength of the membranes was analyzed using tensile testing machine. Scanning electron microscopy was used to study the surface structure and morphology. It was found that by reducing the membrane thickness, the permeance of CO2 and CH4 increased without compromising on membrane strength. GRAPHICAL ABSTRACT
{"title":"Thickness Effect on Permeance of CO2/CH4 Gases in CA Coated PVDF Composite Membranes","authors":"Ayesha Raza, Muhammad Fahad Yousaf, S. Farrukh, A. Hussain","doi":"10.1080/0371750X.2021.1880969","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1880969","url":null,"abstract":"The aim of this work is to study the effect of membrane thickness with respect to gas permeance and tensile strength. The influence of membrane thickness on gas permeation has received little attention to date. Single layer flat sheet membrane with average thickness of 25 μm and dual layer composite membranes with variable thickness of skin layer were fabricated by coating CA/ PEG selective layer on the polyvinylidene fluoride porous support. Permeation experiments were performed with CO2 and CH4 which revealed that permeance of CO2 was pronounced compared to CH4. Highest permeance of 0.87 gas permeation unit (GPU) was obtained at 4 bar with 19.4 μm skin layer. Fourier transform infra-red spectroscopy was used to study the existence of different functional groups in the membranes. Strength of the membranes was analyzed using tensile testing machine. Scanning electron microscopy was used to study the surface structure and morphology. It was found that by reducing the membrane thickness, the permeance of CO2 and CH4 increased without compromising on membrane strength. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"89 - 95"},"PeriodicalIF":1.2,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1880969","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49457692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/0371750X.2021.1904291
A. Basu, Sayantan Ray, S. Saha, J. Chakraborty
In the present study, pristine magnesium aluminium layered double hydroxide (Mg-Al LDH, sample A) nanoparticles were synthesized by simple co-precipitation technique followed by intercalation of methotrexate drug (MTX), their detailed physicochemical characterization and development of RP-HPLC method for estimation of MTX intercalated in Mg-Al LDH nanoparticles (sample B). The PXRD analysis showed the basal spacing of 003 plane corresponding to sample A and sample B to be 8.63 Å and 11.39 Å, respectively. Particle size distributions were measured to be 56-75 nm (D50=66.15 nm) in case of sample A and 75-100 nm (D50=87.41 nm) for sample B. Simple, accurate RP-HPLC method was developed for estimation of the MTX drug from sample B, on Agilent HPLC 1200 system with UV detector on L1 column. 0.02 M potassium dihydrogen phosphate solution (pH 3.0) and acetonitrile (85:15 v/v) was used as mobile phase in an isocratic elution mode at a flow rate of 1.0 mL/min at 35°C with a load of 10 μL at 307 nm. The retention time for methotrexate was at 4.44 min. The method was validated as per ICH Q2 (R1) guidelines. The method was found to be linear over a concentration range of 10-100 μg/mL. GRAPHICAL ABSTRACT
{"title":"Development and Validation of RP-HPLC Method for Estimation of Methotrexate Drug Intercalated in Mg-Al Layered Double Hydroxide Nanoparticles","authors":"A. Basu, Sayantan Ray, S. Saha, J. Chakraborty","doi":"10.1080/0371750X.2021.1904291","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1904291","url":null,"abstract":"In the present study, pristine magnesium aluminium layered double hydroxide (Mg-Al LDH, sample A) nanoparticles were synthesized by simple co-precipitation technique followed by intercalation of methotrexate drug (MTX), their detailed physicochemical characterization and development of RP-HPLC method for estimation of MTX intercalated in Mg-Al LDH nanoparticles (sample B). The PXRD analysis showed the basal spacing of 003 plane corresponding to sample A and sample B to be 8.63 Å and 11.39 Å, respectively. Particle size distributions were measured to be 56-75 nm (D50=66.15 nm) in case of sample A and 75-100 nm (D50=87.41 nm) for sample B. Simple, accurate RP-HPLC method was developed for estimation of the MTX drug from sample B, on Agilent HPLC 1200 system with UV detector on L1 column. 0.02 M potassium dihydrogen phosphate solution (pH 3.0) and acetonitrile (85:15 v/v) was used as mobile phase in an isocratic elution mode at a flow rate of 1.0 mL/min at 35°C with a load of 10 μL at 307 nm. The retention time for methotrexate was at 4.44 min. The method was validated as per ICH Q2 (R1) guidelines. The method was found to be linear over a concentration range of 10-100 μg/mL. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"127 - 134"},"PeriodicalIF":1.2,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1904291","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49410345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-02DOI: 10.1080/0371750X.2020.1852972
Mita Biswas, Aditi Sahoo, K. Muraleedharan, S. Bandyopadhyay
ABSTRACT Laboratory synthesized (carbothermal-reduction-nitridation) 27R-SiAlON is studied in terms of crystallographic and microscopic features by detailed X-ray diffraction and electron microscopy experiments. 27R- SiAlON is analyzed to possess rhombohedral R3m structure and is best represented as Si1.1Al7.9O1.9N8.1. Lattice parameters, ion positions, bond lengths, angles as well as the crystallite size and strain have been determined for the constituent phase. The R3m phase in hexagonal setting exhibits enormous anisotropy with pseudo-tetragonality ratio c/a√6 ∼10. The electron microscopy too offers evidence of preferential growth of platelike crystals of SiAlON due to its large c-axis. GRAPHICAL ABSTRACT
{"title":"Crystal Structure of 27R-SiAlON Synthesized Under Carbothermal Nitridation","authors":"Mita Biswas, Aditi Sahoo, K. Muraleedharan, S. Bandyopadhyay","doi":"10.1080/0371750X.2020.1852972","DOIUrl":"https://doi.org/10.1080/0371750X.2020.1852972","url":null,"abstract":"ABSTRACT Laboratory synthesized (carbothermal-reduction-nitridation) 27R-SiAlON is studied in terms of crystallographic and microscopic features by detailed X-ray diffraction and electron microscopy experiments. 27R- SiAlON is analyzed to possess rhombohedral R3m structure and is best represented as Si1.1Al7.9O1.9N8.1. Lattice parameters, ion positions, bond lengths, angles as well as the crystallite size and strain have been determined for the constituent phase. The R3m phase in hexagonal setting exhibits enormous anisotropy with pseudo-tetragonality ratio c/a√6 ∼10. The electron microscopy too offers evidence of preferential growth of platelike crystals of SiAlON due to its large c-axis. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"1 - 5"},"PeriodicalIF":1.2,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2020.1852972","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47968755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-02DOI: 10.1080/0371750X.2020.1864665
S. Kundu, M. Naskar
This article reviews different membrane processes for the removal of arsenic from groundwater. The source of arsenic and its toxic effects on human body are illustrated. Various membrane filtration processes like micro-filtration, nano-filtration, ultra-filtration and reverse osmosis are discussed. The materials used in different membrane techniques are highlighted towards the removal efficiency of arsenic from water. The influence of pH and coexisting ions on rejection efficiency towards the removal of arsenic of these different processes are studied. The constitution of membrane, rejection mechanism, merits and demerits of different membrane techniques and challenges involved therein are discussed. The future direction of research on membrane based technology is also highlighted in this review. GRAPHICAL ABSTRACT
{"title":"Perspective of Membrane Processes for the Removal of Arsenic from Water: An Overview","authors":"S. Kundu, M. Naskar","doi":"10.1080/0371750X.2020.1864665","DOIUrl":"https://doi.org/10.1080/0371750X.2020.1864665","url":null,"abstract":"This article reviews different membrane processes for the removal of arsenic from groundwater. The source of arsenic and its toxic effects on human body are illustrated. Various membrane filtration processes like micro-filtration, nano-filtration, ultra-filtration and reverse osmosis are discussed. The materials used in different membrane techniques are highlighted towards the removal efficiency of arsenic from water. The influence of pH and coexisting ions on rejection efficiency towards the removal of arsenic of these different processes are studied. The constitution of membrane, rejection mechanism, merits and demerits of different membrane techniques and challenges involved therein are discussed. The future direction of research on membrane based technology is also highlighted in this review. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"28 - 40"},"PeriodicalIF":1.2,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2020.1864665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41510044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-02DOI: 10.1080/0371750X.2021.1871647
L. Hamzioui, F. Kahoul, Abdrazek Guemache, M. Aillerie, A. Boutarfaia
This study describes the microstructure, crystal structure, dielectric and piezoelectric behavior of 0.1Pb[Fe1/2Nb1/2]O3-0.9Pb[ZrxTi(1–x)]O3 (x = 0.49-0.55) ceramics synthesized by solid-state reaction. Compositions were sintered at 1180oC for 120 min. Dense and uniform microstructure was seen through microstructural analysis. XRD pattern confirmed the co-existence of tetragonal and rhombohedral perovskite phases in these compositions where 0.51 ≤ x ≤ 0.53. Compositions with 0.51 ≤ x ≤ 0.53 resulted in the optimum values of properties, viz. dielectric constant (ϵrr) of 1150, piezoelectric coefficient (d31 ) of 95x10–12 C/N, piezoelectric voltage constant (g31 ) of 70x10–3 mV/N and the coupling factor (kp ) value of 0.67. Results indicated that this material composition could be suitable for power harvesting and sensor applications. GRAPHICAL ABSTRACT
{"title":"Effect of Zr/Ti Ratio on Piezoelectric and Dielectric Propertiesof 0.1Pb[Fe1/2Nb1/2]O3-0.9Pb[ZrxTi(1–x)]O30 Ceramics","authors":"L. Hamzioui, F. Kahoul, Abdrazek Guemache, M. Aillerie, A. Boutarfaia","doi":"10.1080/0371750X.2021.1871647","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1871647","url":null,"abstract":"This study describes the microstructure, crystal structure, dielectric and piezoelectric behavior of 0.1Pb[Fe1/2Nb1/2]O3-0.9Pb[ZrxTi(1–x)]O3 (x = 0.49-0.55) ceramics synthesized by solid-state reaction. Compositions were sintered at 1180oC for 120 min. Dense and uniform microstructure was seen through microstructural analysis. XRD pattern confirmed the co-existence of tetragonal and rhombohedral perovskite phases in these compositions where 0.51 ≤ x ≤ 0.53. Compositions with 0.51 ≤ x ≤ 0.53 resulted in the optimum values of properties, viz. dielectric constant (ϵrr) of 1150, piezoelectric coefficient (d31 ) of 95x10–12 C/N, piezoelectric voltage constant (g31 ) of 70x10–3 mV/N and the coupling factor (kp ) value of 0.67. Results indicated that this material composition could be suitable for power harvesting and sensor applications. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"60 - 63"},"PeriodicalIF":1.2,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1871647","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41976658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study reported the effects of labware glass cullet on the properties of porcelain stoneware tiles. Five formulations of porcelain stoneware tiles (containing 0, 3, 6, 9, 12% borosilicate glass cullet) were prepared by adopting three different sintering temperatures (1100o, 1150o, 1200oC). The physical, microstructural and mechanical properties were analyzed. X-ray diffraction analysis ensured the presence of different crystalline phases in the samples. Morphological analysis also confirmed the results obtained from the XRD analysis. However, the density of the specimens increased within their operating parameters. Addition of glass cullet in the tiles increased the kinetics of the sintering process resulting in lower open porosity. Water absorption value of the samples sintered at 1200oC remained within the tolerance limit (∼0.5%). The lowest water absorption value (∼0.10%) as well as the highest linear shrinkage value (∼8.9%) were observed in the sample containing 12% glass cullet. Moreover, the usages of 12% glass cullet resulted in improved mechanical properties in comparison with other synthesized samples, whereas the values of compressive strength, impact strength and hardness were 51.65 MPa, 36.90 psi and 7.22 MPa, respectively. GRAPHICAL ABSTRACT
{"title":"Fabrication and Performance Analysis of Porcelain Stoneware Tiles Incorporated With Labware Glass Cullet","authors":"Md Jahidul Haque, Ahsan Habib Munna, Suhanur Rahman, Ma-ariz Rahman","doi":"10.1080/0371750X.2021.1873864","DOIUrl":"https://doi.org/10.1080/0371750X.2021.1873864","url":null,"abstract":"This study reported the effects of labware glass cullet on the properties of porcelain stoneware tiles. Five formulations of porcelain stoneware tiles (containing 0, 3, 6, 9, 12% borosilicate glass cullet) were prepared by adopting three different sintering temperatures (1100o, 1150o, 1200oC). The physical, microstructural and mechanical properties were analyzed. X-ray diffraction analysis ensured the presence of different crystalline phases in the samples. Morphological analysis also confirmed the results obtained from the XRD analysis. However, the density of the specimens increased within their operating parameters. Addition of glass cullet in the tiles increased the kinetics of the sintering process resulting in lower open porosity. Water absorption value of the samples sintered at 1200oC remained within the tolerance limit (∼0.5%). The lowest water absorption value (∼0.10%) as well as the highest linear shrinkage value (∼8.9%) were observed in the sample containing 12% glass cullet. Moreover, the usages of 12% glass cullet resulted in improved mechanical properties in comparison with other synthesized samples, whereas the values of compressive strength, impact strength and hardness were 51.65 MPa, 36.90 psi and 7.22 MPa, respectively. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":"80 1","pages":"64 - 70"},"PeriodicalIF":1.2,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2021.1873864","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48596094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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