Improving microstructural, mechanical, and thermal properties of Ni-Co-Bronze composites is crucial for various applications. In this study, five Ni-Co-Bronze (CuSn) + XTiC (0, 3, 7, 10, and 15 wt.%) composites were produced by using the hot pressing method. The effect of TiC reinforcement rate on each of their microstructure, wear, hardness, and thermal properties was investigated. Within the scope of microstructure analysis, the scanning electron microscope (SEM), electron dispersive spectrometer (EDS), and XRD analysis were employed. Thermal analyses were carried out for thermal differences between the samples. Furthermore, microhardness, impact, and wear tests were run to estimate mechanical behaviors of Ni-Co Bronze + XTiC composite. Experimental results indicated that TiC rate had an important effect on the microstructure, wear-resistance and microhardness of Ni-Co bronze composite. As the TiC reinforcement rate increased, the hardness of Ni-Co Bronze + XTiC composites varied between 180 HV and 450 HV. Consequently, microstructure analysis revealed that there was a serious interaction between reinforcement and matrix. Wear resistance increased with a TiC (7-10) wt. % rate but decreased at high TiC rates. It was clearly seen that the wear pattern was both oxidative and abrasive.
{"title":"Production of Ni-Co-bronze composites with different tic composition by hot pressing","authors":"A. Imak, M. Kilic, I. Kirik","doi":"10.2298/sos220404007i","DOIUrl":"https://doi.org/10.2298/sos220404007i","url":null,"abstract":"Improving microstructural, mechanical, and thermal properties of Ni-Co-Bronze composites is crucial for various applications. In this study, five Ni-Co-Bronze (CuSn) + XTiC (0, 3, 7, 10, and 15 wt.%) composites were produced by using the hot pressing method. The effect of TiC reinforcement rate on each of their microstructure, wear, hardness, and thermal properties was investigated. Within the scope of microstructure analysis, the scanning electron microscope (SEM), electron dispersive spectrometer (EDS), and XRD analysis were employed. Thermal analyses were carried out for thermal differences between the samples. Furthermore, microhardness, impact, and wear tests were run to estimate mechanical behaviors of Ni-Co Bronze + XTiC composite. Experimental results indicated that TiC rate had an important effect on the microstructure, wear-resistance and microhardness of Ni-Co bronze composite. As the TiC reinforcement rate increased, the hardness of Ni-Co Bronze + XTiC composites varied between 180 HV and 450 HV. Consequently, microstructure analysis revealed that there was a serious interaction between reinforcement and matrix. Wear resistance increased with a TiC (7-10) wt. % rate but decreased at high TiC rates. It was clearly seen that the wear pattern was both oxidative and abrasive.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68809488","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}
P. Elahi, Elizabeth Winterholler, Jude A. Horsley, Taylor D. Sparks
Samples of 6 mol%Sc2O3 ? 1 mol% CeO2 co ? doped ZrO2 were fabricated by conventional ceramic processing methods and sintered at various temperatures from 1000?C to 1650?C in air. The sintering conditions on microstructure and phase content are investigated using various characterization methods, including pycnometry, diffraction, and spectroscopy. The electrical conductivity of samples was investigated using electrochemical impedance spectroscopy (EIS). The effect of inductive load (measured from room temperature to 800?C) is discussed in low to high temperature regimes. At T < 400?C since the arc is not a complete semicircle, the high-frequency arc could be fit using a constant phase element (CPE), while by subtraction of inductive load, a good fit is achieved using a capacitor element instead of CPE. The Arrhenius conductivity plot of samples reveals that the specimen sintered at 1600?C for 6 hours exhibits the highest conductivity. The activation energy (Ea) and conductivity pre-exponential (??0) factor are calculated from a linear fit to data that decreases by the increase in sintering temperature.
6mol %Sc2O3 ?1mol % CeO2 co ?采用传统的陶瓷加工方法制备了掺杂ZrO2，并在1000?C到1650年?C在空气中。采用各种表征方法，包括体积学、衍射和光谱学，研究了烧结条件对微观结构和相含量的影响。利用电化学阻抗谱(EIS)研究了样品的电导率。感应负载的影响(测量从室温到800°C)，讨论了在低到高温制度。T < 400?由于电弧不是一个完整的半圆，高频电弧可以使用恒相元件(CPE)进行适配，而通过减去感性负载，使用电容元件代替CPE实现良好的适配。样品的Arrhenius电导率图显示，试样在1600?在C下放置6小时，电导率最高。通过线性拟合计算活化能(Ea)和电导率指数前因子(0)，该因子随烧结温度的升高而减小。
{"title":"The influence of sintering condition on microstructure, phase composition, and electrochemical performance of the scandia-ceria-Co-doped zirconia for SOFCs","authors":"P. Elahi, Elizabeth Winterholler, Jude A. Horsley, Taylor D. Sparks","doi":"10.2298/sos220805009e","DOIUrl":"https://doi.org/10.2298/sos220805009e","url":null,"abstract":"Samples of 6 mol%Sc2O3 ? 1 mol% CeO2 co ? doped ZrO2 were fabricated by conventional ceramic processing methods and sintered at various temperatures from 1000?C to 1650?C in air. The sintering conditions on microstructure and phase content are investigated using various characterization methods, including pycnometry, diffraction, and spectroscopy. The electrical conductivity of samples was investigated using electrochemical impedance spectroscopy (EIS). The effect of inductive load (measured from room temperature to 800?C) is discussed in low to high temperature regimes. At T < 400?C since the arc is not a complete semicircle, the high-frequency arc could be fit using a constant phase element (CPE), while by subtraction of inductive load, a good fit is achieved using a capacitor element instead of CPE. The Arrhenius conductivity plot of samples reveals that the specimen sintered at 1600?C for 6 hours exhibits the highest conductivity. The activation energy (Ea) and conductivity pre-exponential (??0) factor are calculated from a linear fit to data that decreases by the increase in sintering temperature.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68811006","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}
A. Elayeb, Milovan R. Janković, Stefan Dikic, D. Bekric, I. Balać
Tensile properties of thin plate specimens made from short carbon fiber reinforced PET-G material are experimentally evaluated for various raster angles (printing directions). In additive manufacturing (AM), raster angle is recognized as one of the key printing parameters which strongly influences the strength and stiffness of the final part. The relatively high average value of ultimate tensile strength was obtained for specimens printed with the 0? raster angle, compared to the value obtained for specimens printed with the 90? raster angle - 52.2 MPa and 25.4 MPa, respectively. Similarly, noticeably higher average value of modulus of elasticity was obtained for specimens printed with the 0? raster angle, compared to the value obtained for specimens printed with the 90? raster angle - 4752 MPa and 1569 MPa, respectively. Scanning electron microscopy (SEM) was used for analysis of specimens? fracture surfaces. SEM images revealed considerable volume fraction of voids (porosity). ?he porosity, together with weak bonding between two adjacent rasters, could be one of key factors for poor tensile properties of samples printed with rasters perpendicular to direction of load application (90? raster angle).
{"title":"Influence of raster angle on tensile properties of FDM additively manufactured plates made from carbon reinforced PET-G material","authors":"A. Elayeb, Milovan R. Janković, Stefan Dikic, D. Bekric, I. Balać","doi":"10.2298/sos220916010e","DOIUrl":"https://doi.org/10.2298/sos220916010e","url":null,"abstract":"Tensile properties of thin plate specimens made from short carbon fiber reinforced PET-G material are experimentally evaluated for various raster angles (printing directions). In additive manufacturing (AM), raster angle is recognized as one of the key printing parameters which strongly influences the strength and stiffness of the final part. The relatively high average value of ultimate tensile strength was obtained for specimens printed with the 0? raster angle, compared to the value obtained for specimens printed with the 90? raster angle - 52.2 MPa and 25.4 MPa, respectively. Similarly, noticeably higher average value of modulus of elasticity was obtained for specimens printed with the 0? raster angle, compared to the value obtained for specimens printed with the 90? raster angle - 4752 MPa and 1569 MPa, respectively. Scanning electron microscopy (SEM) was used for analysis of specimens? fracture surfaces. SEM images revealed considerable volume fraction of voids (porosity). ?he porosity, together with weak bonding between two adjacent rasters, could be one of key factors for poor tensile properties of samples printed with rasters perpendicular to direction of load application (90? raster angle).","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68811147","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}
Emina Pozega, Slavko Bernik, Sasa Marjanovic, Ana Petrovic, Igor Svrkota, Andjela Stojic, Danijela Simonovic
As part of research on the influence of selenium as dopant on bismuth telluride, a successful synthesis of single crystal was carried out. Single crystal of p type conductivity, with the given compound formula, Bi2Te2.88Se0.12, was obtained by the Bridgman process. The obtained empirical formula does not deviate from the given compound formula. Single crystal was characterized by Hall Effect system based on the Van der Pauw method. Also, bulk sample was characterized by Seebeck coefficient (S), thermal conductivity (?) and electrical resistivity (?) measurements, as ? function of temperature in the range of 40 - 320?C by ? home made impedance meter. The prepared single crystal has a figure of merit (Z) of 2.16 x 10-3 K-1 at 40?C. Values of ZT are about 1.0 at 27?C for commercialized p and n type of bismuth telluride ingots. T is absolute temperature.
作为硒作为掺杂剂对碲化铋影响研究的一部分，成功地合成了单晶。采用Bridgman法制备了p型电导率单晶，其分子式为Bi2Te2.88Se0.12。所得的经验公式不偏离给定的复合公式。利用范德泡法对单晶进行了霍尔效应表征。同时，用塞贝克系数(S)、导热系数(?)和电阻率(?)对样品进行了表征。功能温度范围在40 - 320?C by ?自制阻抗计。制备的单晶在40℃时的优值(Z)为2.16 × 10-3 K-1。ZT的值在27?C为商品化p型和n型碲化铋锭。T是绝对温度。
{"title":"Investigation of Bi2Te2.88Se0.12 bulk single crystal produced using Bridgman method","authors":"Emina Pozega, Slavko Bernik, Sasa Marjanovic, Ana Petrovic, Igor Svrkota, Andjela Stojic, Danijela Simonovic","doi":"10.2298/sos231017056p","DOIUrl":"https://doi.org/10.2298/sos231017056p","url":null,"abstract":"As part of research on the influence of selenium as dopant on bismuth telluride, a successful synthesis of single crystal was carried out. Single crystal of p type conductivity, with the given compound formula, Bi2Te2.88Se0.12, was obtained by the Bridgman process. The obtained empirical formula does not deviate from the given compound formula. Single crystal was characterized by Hall Effect system based on the Van der Pauw method. Also, bulk sample was characterized by Seebeck coefficient (S), thermal conductivity (?) and electrical resistivity (?) measurements, as ? function of temperature in the range of 40 - 320?C by ? home made impedance meter. The prepared single crystal has a figure of merit (Z) of 2.16 x 10-3 K-1 at 40?C. Values of ZT are about 1.0 at 27?C for commercialized p and n type of bismuth telluride ingots. T is absolute temperature.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134888208","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}
M. Mirković, J. Maletaskic, S. Butulija, L. Andjelković, M. Šuljagić
This paper shows a simple way to synthesize a series of Ce1-xSrxPO4 ceramic materials using acetate solutions of Ce and Sr instead of nitrate which were used so far. For synthesis, the preparation method was used by simple mixing of acetate solutions of Ceand Sr(, with NaH2PO4 at room temperature, and the studied compositions were Ce1-xSrxPO4 (where x = 0, 0.1, 0.2, 0.3, 0.4, 0.5). The disintegration of Sr in monazite structures in different sintering temperature ranges from 600?C to 1000?C was investigated. The X-ray diffraction was used to track the evolution of the phase composition with thermal treatment. The morphology of sintered ceramics was obtained by scanning electron microscopy and vibrational bands of selected spectra were observed using the FT-IR method. Relative geometric density of selected samples was evaluated. The most favorable conditions for obtaining high-temperature Ce, Sr phosphate-based ceramic material are reported.
{"title":"The influence of strontium content and sintering temperature on monazite stability","authors":"M. Mirković, J. Maletaskic, S. Butulija, L. Andjelković, M. Šuljagić","doi":"10.2298/sos220811024m","DOIUrl":"https://doi.org/10.2298/sos220811024m","url":null,"abstract":"This paper shows a simple way to synthesize a series of Ce1-xSrxPO4 ceramic materials using acetate solutions of Ce and Sr instead of nitrate which were used so far. For synthesis, the preparation method was used by simple mixing of acetate solutions of Ceand Sr(, with NaH2PO4 at room temperature, and the studied compositions were Ce1-xSrxPO4 (where x = 0, 0.1, 0.2, 0.3, 0.4, 0.5). The disintegration of Sr in monazite structures in different sintering temperature ranges from 600?C to 1000?C was investigated. The X-ray diffraction was used to track the evolution of the phase composition with thermal treatment. The morphology of sintered ceramics was obtained by scanning electron microscopy and vibrational bands of selected spectra were observed using the FT-IR method. Relative geometric density of selected samples was evaluated. The most favorable conditions for obtaining high-temperature Ce, Sr phosphate-based ceramic material are reported.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68811068","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}
Hydroxyapatite (HA) and bioglass (BG) ceramics have become of prime importance in bone tissue engineering. Besides the appropriate composition, the microstructure of bone replacement plays a crucial role. In the present work, particle composites and functionally graded material (FGM) based on HA and BG prepared by electrophoretic deposition were thoroughly characterised in terms of the preparation method, sintering process, phase composition and microstructure. The sintering was monitored by high-temperature dilatometry in two directions, the sintering rates were calculated, and the overall sintering process was discussed. The SEM showed the continuous change in the microstructure of FGM with gradual interconnected porosity favourable for bio-applications. The fundamental fractographic analysis proved the crack development in FGM related to the sintering process, and the recommendations for the reduction of the crack development were given. The phase transformations during thermal treatment were analysed using X-ray diffraction analysis and deeply discussed.
{"title":"Dilatometric and microstructural study of particle and functionally graded composites based on hydroxyapatite and crystalline bioglass","authors":"D. Drdlík, K. Drdlíková, K. Maca","doi":"10.2298/sos221028017d","DOIUrl":"https://doi.org/10.2298/sos221028017d","url":null,"abstract":"Hydroxyapatite (HA) and bioglass (BG) ceramics have become of prime importance in bone tissue engineering. Besides the appropriate composition, the microstructure of bone replacement plays a crucial role. In the present work, particle composites and functionally graded material (FGM) based on HA and BG prepared by electrophoretic deposition were thoroughly characterised in terms of the preparation method, sintering process, phase composition and microstructure. The sintering was monitored by high-temperature dilatometry in two directions, the sintering rates were calculated, and the overall sintering process was discussed. The SEM showed the continuous change in the microstructure of FGM with gradual interconnected porosity favourable for bio-applications. The fundamental fractographic analysis proved the crack development in FGM related to the sintering process, and the recommendations for the reduction of the crack development were given. The phase transformations during thermal treatment were analysed using X-ray diffraction analysis and deeply discussed.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"6 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68811262","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 aims to investigate the microhardness and wear properties of AA2196 alloy, one of the new generation aluminum-lithium (Al-Li) alloys, reinforced with single and dual (hybrid) ceramic composites. The produced materials were evaluated to improve their properties. The microhardness and wear tests were conducted to assess the mechanical properties of the materials. The results indicate that the dual ceramic reinforced composite materials with AA2196 matrix exhibit superior performance compared to the single compositions. The 12% reinforced hybrid composite alloy (Alloy13) demonstrated the highest microhardness result, while the 2% and 4% reinforced hybrid composite materials exhibited the highest wear resistance. These findings suggest that the microhardness and wear properties of AA2196 alloy can be enhanced through the use of ceramic composites.
{"title":"Investigation of wear and microhardness behaviors of AA2196 matrix composite materials reinforced with ceramics produced by powder metallurgy method","authors":"T. Findik","doi":"10.2298/sos230417030f","DOIUrl":"https://doi.org/10.2298/sos230417030f","url":null,"abstract":"This study aims to investigate the microhardness and wear properties of AA2196 alloy, one of the new generation aluminum-lithium (Al-Li) alloys, reinforced with single and dual (hybrid) ceramic composites. The produced materials were evaluated to improve their properties. The microhardness and wear tests were conducted to assess the mechanical properties of the materials. The results indicate that the dual ceramic reinforced composite materials with AA2196 matrix exhibit superior performance compared to the single compositions. The 12% reinforced hybrid composite alloy (Alloy13) demonstrated the highest microhardness result, while the 2% and 4% reinforced hybrid composite materials exhibited the highest wear resistance. These findings suggest that the microhardness and wear properties of AA2196 alloy can be enhanced through the use of ceramic composites.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812292","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}
In this study, CuNiSi alloys were produced using powder metallurgy in molten salt (KBr). In the Cu, Ni, and Si powder mixture, Fe was added at a rate of 2.5%, 5 and 7.5% and mechanical alloying was carried out for 4 hours at 400 rpm. Prepared powder mixtures were cold pressed under 600 MPa pressure and sintered for 3 hours at 900 ? in an argon atmosphere. Phase formation, microstructure, microhardness, electrical conductivity, and corrosion of the produced samples were analyzed in detail. Scanning electron microscope (SEM) was used to detect the changes in the microstructure of the produced samples, and an X-ray diffractogram (XRD) was used to determine the phases formed in the internal structure of the materials. In order to determine the mechanical properties of the produced samples, hardness analyzes were made with a microhardness measuring device. The electrical conductivity properties of the produced CuNiSi and CuNiSiFe alloys were determined due to the increase in the Fe ratio. Corrosion tests of the produced samples were determined by potentiodynamic polarization curves in a 3.5% NaCl solution. Fe-reinforced CuNiSi composite materials have been successfully produced in molten salt (KBr). CuNiSi alloy, the microstructure is dominated by the typical large and small particles. Fe element is homogeneously dispersed in the CuNiSi alloy instead of being separated using the Ni element. Fe particles have decreased the hardness of produced alloys. The electrical conductivity properties changed with increasing voltages depending on the increase of Fe supplementation, and as a result, the sample containing 7.5% Fe had the best electrical conductivity values. Results showed that by increasing the amount of Fe, the mechanical properties and corrosion resistance increased.
{"title":"The effect of molten salt on the mechanical properties and microstructure of CuNiSi alloys with reinforced Fe","authors":"M. Akkaş","doi":"10.2298/sos230327028a","DOIUrl":"https://doi.org/10.2298/sos230327028a","url":null,"abstract":"In this study, CuNiSi alloys were produced using powder metallurgy in molten salt (KBr). In the Cu, Ni, and Si powder mixture, Fe was added at a rate of 2.5%, 5 and 7.5% and mechanical alloying was carried out for 4 hours at 400 rpm. Prepared powder mixtures were cold pressed under 600 MPa pressure and sintered for 3 hours at 900 ? in an argon atmosphere. Phase formation, microstructure, microhardness, electrical conductivity, and corrosion of the produced samples were analyzed in detail. Scanning electron microscope (SEM) was used to detect the changes in the microstructure of the produced samples, and an X-ray diffractogram (XRD) was used to determine the phases formed in the internal structure of the materials. In order to determine the mechanical properties of the produced samples, hardness analyzes were made with a microhardness measuring device. The electrical conductivity properties of the produced CuNiSi and CuNiSiFe alloys were determined due to the increase in the Fe ratio. Corrosion tests of the produced samples were determined by potentiodynamic polarization curves in a 3.5% NaCl solution. Fe-reinforced CuNiSi composite materials have been successfully produced in molten salt (KBr). CuNiSi alloy, the microstructure is dominated by the typical large and small particles. Fe element is homogeneously dispersed in the CuNiSi alloy instead of being separated using the Ni element. Fe particles have decreased the hardness of produced alloys. The electrical conductivity properties changed with increasing voltages depending on the increase of Fe supplementation, and as a result, the sample containing 7.5% Fe had the best electrical conductivity values. Results showed that by increasing the amount of Fe, the mechanical properties and corrosion resistance increased.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812004","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}
In this work, pellet samples of barium calcium zirconate titanate (Ba1-xCaxZr0.1Ti0.9O3, x=0.065) were prepared using solid state reaction route with double sintering. The structural and piezoelectric properties were measured. Further, SEM and EDAX analysis were observed. With different sintering temperature, the density and grain size of the prepared pellet samples were changed and further, their effect in piezoelectric properties has been observed. For the prepared samples, the converse piezoelectric constant (d33*) has been decreased with the increase in sintering temperature. The piezoelectric constant (d33*) was measured highest (153 pm/V) at 1300?C.
{"title":"Effect of sintering on the piezoelectric properties and microstructure of lead free (Ba1-xCaxZr0.1Ti0.9O3) (x=0.065) ceramics","authors":"Don Biswas, Prolay Sharma, N. Panwar","doi":"10.2298/sos2202201b","DOIUrl":"https://doi.org/10.2298/sos2202201b","url":null,"abstract":"In this work, pellet samples of barium calcium zirconate titanate (Ba1-xCaxZr0.1Ti0.9O3, x=0.065) were prepared using solid state reaction route with double sintering. The structural and piezoelectric properties were measured. Further, SEM and EDAX analysis were observed. With different sintering temperature, the density and grain size of the prepared pellet samples were changed and further, their effect in piezoelectric properties has been observed. For the prepared samples, the converse piezoelectric constant (d33*) has been decreased with the increase in sintering temperature. The piezoelectric constant (d33*) was measured highest (153 pm/V) at 1300?C.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68809228","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}
A. Purbasari, D. Ariyanti, S. Sumardiono, Muhammad Shofa, Reinhard Manullang
Fly ash which is solid waste can be used as an adsorbent for wastewater treatment. Alkali modification and alkali activation on fly ash can increase the adsorption capacity of fly ash. In this study, alkali modified fly ash and alkali activated fly ash were used as Zn(II) ions adsorbents. The effect of adsorption time and initial concentration of Zn(II) ions was studied, as well as the kinetics and isotherm adsorption. The results showed that the removal efficiency of Zn(II) ions by alkali activated fly ash is higher than that by alkali modified fly ash. The adsorptions of Zn(II) ions by alkali modified fly ash and by alkali activated fly ash have reached equilibrium after two hours. The increase of initial concentration of Zn(II) ions would decrease the removal efficiency with both alkali modified fly ash and alkali activated fly ash. Adsorptions of Zn(II) ions by both alkali modified fly ash and alkali activated fly ash tend to follow pseudo second order kinetics model and Langmuir isotherm model with maximum adsorption capacity of 62.696 mg/g and 66.667 mg/g, respectively.
{"title":"Comparison of alkali modified fly ash and alkali activated fly ash as Zn(II) ions adsorbent from aqueous solution","authors":"A. Purbasari, D. Ariyanti, S. Sumardiono, Muhammad Shofa, Reinhard Manullang","doi":"10.2298/sos2201049p","DOIUrl":"https://doi.org/10.2298/sos2201049p","url":null,"abstract":"Fly ash which is solid waste can be used as an adsorbent for wastewater treatment. Alkali modification and alkali activation on fly ash can increase the adsorption capacity of fly ash. In this study, alkali modified fly ash and alkali activated fly ash were used as Zn(II) ions adsorbents. The effect of adsorption time and initial concentration of Zn(II) ions was studied, as well as the kinetics and isotherm adsorption. The results showed that the removal efficiency of Zn(II) ions by alkali activated fly ash is higher than that by alkali modified fly ash. The adsorptions of Zn(II) ions by alkali modified fly ash and by alkali activated fly ash have reached equilibrium after two hours. The increase of initial concentration of Zn(II) ions would decrease the removal efficiency with both alkali modified fly ash and alkali activated fly ash. Adsorptions of Zn(II) ions by both alkali modified fly ash and alkali activated fly ash tend to follow pseudo second order kinetics model and Langmuir isotherm model with maximum adsorption capacity of 62.696 mg/g and 66.667 mg/g, respectively.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68808898","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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