My comments concern the errors in the crystallographic part and possible misconduct of the authors of the commented paper regarding their usage of the same SEM image in different subsequent works. Moreover, the true chemical composition of the studied sample is questionable since the authors claim different systems for the same SEM micrograph in five different papers mentioned here.
{"title":"Comments on the paper “Structure, electric and dielectric properties of PbFe1/3Ti1/3W1/3O3 single perovskite compound” by P.G.R. Achary, R.N.P. Choudhary, S.K. Parida, published in Processing and Application of Ceramics 14 (2020) 146-153","authors":"P. Tomaszewski","doi":"10.2298/pac2301104t","DOIUrl":"https://doi.org/10.2298/pac2301104t","url":null,"abstract":"My comments concern the errors in the crystallographic part and possible misconduct of the authors of the commented paper regarding their usage of the same SEM image in different subsequent works. Moreover, the true chemical composition of the studied sample is questionable since the authors claim different systems for the same SEM micrograph in five different papers mentioned here.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582523","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}
Sol-gel-synthesized ZrO2-based nanoparticles, containing 1.5mol% Y2O3 used as dopant and 25mol% Al2O3 (abbreviated as ZrO2(1.5Y)-25Al2O3), were densified by pulsed electric current sintering (PECS) accompanied with a two-step heating profile. Particularly, sintering was carried out in the temperature range from 1050 to 1200?C for 10min, followed by dwell at 1325?C for 10min. The ZrO2-based ceramics achieved by the two-step sintering was fully dense, containing 98 vol.% of tetragonal ZrO2 phase. Morphology of the sintered samples showed the submicron grains with uniform size distribution. Although the second-step sintering temperature was fixed at 1325?C, the mean grain size was increased along with the increase in the first-step sintering temperature. In addition, the material characterization of the samples after the first-step heating was tested to investigate the influence of the first-step sintering on the consolidation of ceramics achieved via the two-step sintering.
{"title":"Consolidation of alumina toughened zirconia by two-step sintering","authors":"K. Dang, Y. Nguyen, H. Vu","doi":"10.2298/pac2302164d","DOIUrl":"https://doi.org/10.2298/pac2302164d","url":null,"abstract":"Sol-gel-synthesized ZrO2-based nanoparticles, containing 1.5mol% Y2O3 used as dopant and 25mol% Al2O3 (abbreviated as ZrO2(1.5Y)-25Al2O3), were densified by pulsed electric current sintering (PECS) accompanied with a two-step heating profile. Particularly, sintering was carried out in the temperature range from 1050 to 1200?C for 10min, followed by dwell at 1325?C for 10min. The ZrO2-based ceramics achieved by the two-step sintering was fully dense, containing 98 vol.% of tetragonal ZrO2 phase. Morphology of the sintered samples showed the submicron grains with uniform size distribution. Although the second-step sintering temperature was fixed at 1325?C, the mean grain size was increased along with the increase in the first-step sintering temperature. In addition, the material characterization of the samples after the first-step heating was tested to investigate the influence of the first-step sintering on the consolidation of ceramics achieved via the two-step sintering.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68583363","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}
Danica Piper, Jelena Vukmirović, Iva Tokovic, Á. Kukovecz, Imre Szenti, M. Novaković, M. Milanović, V. Srdić
In this work bilayer structures, composed of ferromagnetic manganite and ferroelectric titanate layers, were obtained by solution deposition technique. The first step in preparation of the bilayer thin films was deposition of manganite (LaMnO3 or La0.7Sr0.3MnO3) layer by water-based polymer assisted deposition (PAD). Polycrystalline structures were obtained when manganite films were deposited by spin coating on commercial Pt/TiO2/SiO2/Si type substrate, whereas epitaxial films were grown on a single crystal SrTiO3 with (001) orientation substrate. The second ferroelectric titanate (BaTiO3 or Ba0.7Sr0.3TiO3) layer was deposited by spin coating using sol-gel method. The obtained bilayer structures have thickness below 100 nm, and epitaxial growth of the Ba0.7Sr0.3TiO3 film on the La0.7Sr0.3MnO3 surface was obtained, due to the similar lattice parameters between these two crystal structures.
{"title":"Epitaxial bilayer La0.7Sr0.3MnO3/Ba0.7Sr0.3TiO3 thin films obtained by polymer assisted deposition","authors":"Danica Piper, Jelena Vukmirović, Iva Tokovic, Á. Kukovecz, Imre Szenti, M. Novaković, M. Milanović, V. Srdić","doi":"10.2298/pac2302197p","DOIUrl":"https://doi.org/10.2298/pac2302197p","url":null,"abstract":"In this work bilayer structures, composed of ferromagnetic manganite and ferroelectric titanate layers, were obtained by solution deposition technique. The first step in preparation of the bilayer thin films was deposition of manganite (LaMnO3 or La0.7Sr0.3MnO3) layer by water-based polymer assisted deposition (PAD). Polycrystalline structures were obtained when manganite films were deposited by spin coating on commercial Pt/TiO2/SiO2/Si type substrate, whereas epitaxial films were grown on a single crystal SrTiO3 with (001) orientation substrate. The second ferroelectric titanate (BaTiO3 or Ba0.7Sr0.3TiO3) layer was deposited by spin coating using sol-gel method. The obtained bilayer structures have thickness below 100 nm, and epitaxial growth of the Ba0.7Sr0.3TiO3 film on the La0.7Sr0.3MnO3 surface was obtained, due to the similar lattice parameters between these two crystal structures.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68583525","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}
The mechanical and electronic properties of NiCo2O4 crystal under high pressure are explored based on the density functional theory method. The pressure in the range from 0 to 50GPa is applied to NiCo2O4 and the behaviour concerning electronic properties is studied. The energy band gap of NiCo2O4 gradually decreases from 2.196 eV (0GPa) to 1.785 eV (50GPa). The elastic constants for cubic NiCo2O4 are calculated and bulk, shear and Young?s modulus are further computed. Furthermore, Cauchy?s pressure, Pugh?s criterion and Pois-son?s ratio of NiCo2O4 are calculated and reported under high pressure. The NiCo2O4 exhibits ductile property under high pressure, which is evident from Pugh?s criterion. In addition, hardness and anisotropy factor is also calculated and reported.
利用密度泛函理论方法研究了NiCo2O4晶体在高压下的力学和电子性能。对NiCo2O4施加0 ~ 50GPa的压力，研究了NiCo2O4的电子性能。NiCo2O4的能带隙从2.196 eV (0GPa)逐渐减小到1.785 eV (50GPa)。计算了立方体NiCo2O4的弹性常数，得到了体积、剪切和Young?进一步计算S模量。此外,柯西吗?有压力吗，皮尤?s标准和泊松?计算并报道了高压下NiCo2O4的s比。NiCo2O4在高压下表现出延展性，这一点从Pugh?年代标准。此外，还计算并报道了硬度和各向异性因子。
{"title":"Mechanical and electronic properties of NiCo2O4 under high pressure: A first-principles calculation","authors":"Veerappan Nagarajan, Karthigayan Padmashri, Ramanathan Chandiramouli","doi":"10.2298/pac2303314n","DOIUrl":"https://doi.org/10.2298/pac2303314n","url":null,"abstract":"The mechanical and electronic properties of NiCo2O4 crystal under high pressure are explored based on the density functional theory method. The pressure in the range from 0 to 50GPa is applied to NiCo2O4 and the behaviour concerning electronic properties is studied. The energy band gap of NiCo2O4 gradually decreases from 2.196 eV (0GPa) to 1.785 eV (50GPa). The elastic constants for cubic NiCo2O4 are calculated and bulk, shear and Young?s modulus are further computed. Furthermore, Cauchy?s pressure, Pugh?s criterion and Pois-son?s ratio of NiCo2O4 are calculated and reported under high pressure. The NiCo2O4 exhibits ductile property under high pressure, which is evident from Pugh?s criterion. In addition, hardness and anisotropy factor is also calculated and reported.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"131 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":"135270027","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}
Based on the Density Functional Theory (DFT) electronic band structure, state density, linear optics, elastic, dynamic and thermodynamic properties of ??-SrTa2O6 crystal with P4/mbm (No. 127) space group were investigated with the help of ABINIT and Wien2k code. In the study, it was found that the ??-SrTa2O6 crystal is classified as a semiconductor with an indirect bandgap. For this crystal, the dielectric function was obtained and optical constants such as energy loss function, extinction coefficient, absorption coefficient and reflectivity were calculated. The components of the elastic stiffness tensor, the phonon dispersion, the state density and the contribution of each atom to the state density were obtained. Finally, thermodynamic properties were determined for the ??-SrTa2O6 crystal. Furthermore, the changes in free energy (F), internal energy (E), entropy (S) and heat capacity (C) depending on the temperature were investigated.
{"title":"Theoretical prediction by DFT on properties of β′-SrTa2O6 crystal","authors":"M. Aycibin, M. Erzen, H. Akkuş","doi":"10.2298/pac2301001a","DOIUrl":"https://doi.org/10.2298/pac2301001a","url":null,"abstract":"Based on the Density Functional Theory (DFT) electronic band structure, state density, linear optics, elastic, dynamic and thermodynamic properties of ??-SrTa2O6 crystal with P4/mbm (No. 127) space group were investigated with the help of ABINIT and Wien2k code. In the study, it was found that the ??-SrTa2O6 crystal is classified as a semiconductor with an indirect bandgap. For this crystal, the dielectric function was obtained and optical constants such as energy loss function, extinction coefficient, absorption coefficient and reflectivity were calculated. The components of the elastic stiffness tensor, the phonon dispersion, the state density and the contribution of each atom to the state density were obtained. Finally, thermodynamic properties were determined for the ??-SrTa2O6 crystal. Furthermore, the changes in free energy (F), internal energy (E), entropy (S) and heat capacity (C) depending on the temperature were investigated.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582554","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}
Jun Zhang, Jie Pang, W. Jin, S. Chu, Martin Haarberg, S. Xiao
In this paper a novel method for fabrication of TiB2 coatings on graphite substrates by electrophoretic deposition of TiB2 nanoparticles in NaF-AlF3 melt at 980?C has been explored. With an applied cell voltage of 1.2 V (i.e. electric field 0.6 V/cm), a flat and dense TiB2 coating with a thickness of around 50 ?m has been prepared. It was found that the surface consisted of TiB2 flakes with a nanoscale size. In addition, the average value of hardness of the TiB2 coating was determined as 3585 ? 139 HV0.1 (36.6 ? 1.4GPa) measured by a Vickers micro-hardness tester.
{"title":"Production of tib2 coatings on graphite substrates by electrophoretic deposition in NaF-AlF3 melt","authors":"Jun Zhang, Jie Pang, W. Jin, S. Chu, Martin Haarberg, S. Xiao","doi":"10.2298/pac2301009z","DOIUrl":"https://doi.org/10.2298/pac2301009z","url":null,"abstract":"In this paper a novel method for fabrication of TiB2 coatings on graphite substrates by electrophoretic deposition of TiB2 nanoparticles in NaF-AlF3 melt at 980?C has been explored. With an applied cell voltage of 1.2 V (i.e. electric field 0.6 V/cm), a flat and dense TiB2 coating with a thickness of around 50 ?m has been prepared. It was found that the surface consisted of TiB2 flakes with a nanoscale size. In addition, the average value of hardness of the TiB2 coating was determined as 3585 ? 139 HV0.1 (36.6 ? 1.4GPa) measured by a Vickers micro-hardness tester.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582583","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}
D. Isidorio, E. Santos, A. Filho, S. Da, Amal Eltom, Biasi de
Supercapacitors are energy storage devices that can cleanly and efficiently meet the growing energy demand. The presentwork describes the synthesis of nanoparticles of cobalt ferrite (CoFe2O4) by the combustion method and their use with activated carbon (AC) to manufacture supercapacitors. In order to study the influence of composition on the electrochemical properties, supercapacitors with three different compositions were produced: Fe90 (90% CoFe2O4 and 10% AC), Fe50 (50% CoFe2O4 and 50% AC) and Fe10 (10% CoFe2O4 and 90% AC). Microstructural and morphological analyses were performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronmicroscopy (TEM), and Raman spectroscopy. Cyclic voltam-metry (CV), galvanostatic charge-discharge (GCD), floating and electrochemical impedance spectroscopy (EIS) tests were performed. XRD, SEM, TEM and Raman results showed that the combustion method was effective for the production of CoFe2O4 nanoparticles. SEM and Raman spectroscopy results showed that the AC has a porous structure and low crystallinity. According to CV, GCD and floating tests, all three supercapacitors presented excellent electrochemical stability. The Fe50 composition yielded the lowest equivalent series resistance, while the Fe10 composition yielded the highest capacitance. The results show that the combination of AC with CoFe2O4 is promising for the use in supercapacitors.
{"title":"Use of cobalt ferrite and activated carbon in supercapacitors","authors":"D. Isidorio, E. Santos, A. Filho, S. Da, Amal Eltom, Biasi de","doi":"10.2298/pac2301014i","DOIUrl":"https://doi.org/10.2298/pac2301014i","url":null,"abstract":"Supercapacitors are energy storage devices that can cleanly and efficiently meet the growing energy demand. The presentwork describes the synthesis of nanoparticles of cobalt ferrite (CoFe2O4) by the combustion method and their use with activated carbon (AC) to manufacture supercapacitors. In order to study the influence of composition on the electrochemical properties, supercapacitors with three different compositions were produced: Fe90 (90% CoFe2O4 and 10% AC), Fe50 (50% CoFe2O4 and 50% AC) and Fe10 (10% CoFe2O4 and 90% AC). Microstructural and morphological analyses were performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronmicroscopy (TEM), and Raman spectroscopy. Cyclic voltam-metry (CV), galvanostatic charge-discharge (GCD), floating and electrochemical impedance spectroscopy (EIS) tests were performed. XRD, SEM, TEM and Raman results showed that the combustion method was effective for the production of CoFe2O4 nanoparticles. SEM and Raman spectroscopy results showed that the AC has a porous structure and low crystallinity. According to CV, GCD and floating tests, all three supercapacitors presented excellent electrochemical stability. The Fe50 composition yielded the lowest equivalent series resistance, while the Fe10 composition yielded the highest capacitance. The results show that the combination of AC with CoFe2O4 is promising for the use in supercapacitors.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"92 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582616","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}
Gaolin Ye, Yifei Jiao, Peng Zhou, Jinxing Sun, Likuan Zhu, F. Gong, Jiaming Bai, Gang Liu, Ming Yan, Rubing Zhang
Stereolithography-based additive manufacturing of ceramics has received tremendous attention in academic and industrial communities. In order to fabricate silicon carbide (SiC) components with complex shapes by stereolithography, a high SiC loaded ceramic slurry with low viscosity and excellent curing ability is required. However, it is challenging to meet these slurry requirements. In this work, the effects of resin formulation, dispersant, particle size, solid content and ball milling time on the properties of SiC ceramic slurry were systematically studied. The SiC slurries were prepared by using four precursor SiC powders having different particle sizes and modified by high temperature oxidation to reduce its UV absorbance. Additionally, the suitable SiC slurries for stereolithography were prepared by ball milling under appropriate processing parameters, and the geometrically complex SiC green bodies were subsequently fabricated.
{"title":"Preparation of silicon carbide ceramic slurry for stereolithography based additive manufacturing","authors":"Gaolin Ye, Yifei Jiao, Peng Zhou, Jinxing Sun, Likuan Zhu, F. Gong, Jiaming Bai, Gang Liu, Ming Yan, Rubing Zhang","doi":"10.2298/pac2301047y","DOIUrl":"https://doi.org/10.2298/pac2301047y","url":null,"abstract":"Stereolithography-based additive manufacturing of ceramics has received tremendous attention in academic and industrial communities. In order to fabricate silicon carbide (SiC) components with complex shapes by stereolithography, a high SiC loaded ceramic slurry with low viscosity and excellent curing ability is required. However, it is challenging to meet these slurry requirements. In this work, the effects of resin formulation, dispersant, particle size, solid content and ball milling time on the properties of SiC ceramic slurry were systematically studied. The SiC slurries were prepared by using four precursor SiC powders having different particle sizes and modified by high temperature oxidation to reduce its UV absorbance. Additionally, the suitable SiC slurries for stereolithography were prepared by ball milling under appropriate processing parameters, and the geometrically complex SiC green bodies were subsequently fabricated.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582749","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}
Linling Huang, Zhicheng Li, Kaifeng Li, You Zhang, Hong Zhang, S. Leng
Thermistors with negative temperature coefficient (NTC) of resistivity are important components for temperature sensors and actuators. High material constant (B value) of NTC thermistor, i.e. high-temperature sensitivity, is one of key focuses. Herein, Bi/Mg modified NiO based ceramics for NTC thermistors were prepared by conventional solid-state reaction method. Introduction of Bi2O3 significantly enhances the sintering ability of ceramics and reduces the sintering temperature from 1380 to 1250?C. Mg-doping (i.e. preparation of Ni1-xMgxO ceramics, where x=0, 0.02, 0.05, 0.07 and 0.1) has significant effect on room temperature resistivity (?25). Phase composition, microstructure, electrical property and electrical stability were investigated. All prepared ceramics have the phase with rock-salt structure and show typical NTC characteristics with B values higher than 5300K. The electrical stability with an optimized resistance-change rate of 1.02%after being aged at 150?C for 500 h is achieved. The electrical properties of the ceramics were analysed by combining X-ray photoelectron spectra with complex impedance spectra.
{"title":"Electrical conductivity and electrical stability of Bi/Mg modified NiO ceramics for NTC thermistors","authors":"Linling Huang, Zhicheng Li, Kaifeng Li, You Zhang, Hong Zhang, S. Leng","doi":"10.2298/pac2302172h","DOIUrl":"https://doi.org/10.2298/pac2302172h","url":null,"abstract":"Thermistors with negative temperature coefficient (NTC) of resistivity are important components for temperature sensors and actuators. High material constant (B value) of NTC thermistor, i.e. high-temperature sensitivity, is one of key focuses. Herein, Bi/Mg modified NiO based ceramics for NTC thermistors were prepared by conventional solid-state reaction method. Introduction of Bi2O3 significantly enhances the sintering ability of ceramics and reduces the sintering temperature from 1380 to 1250?C. Mg-doping (i.e. preparation of Ni1-xMgxO ceramics, where x=0, 0.02, 0.05, 0.07 and 0.1) has significant effect on room temperature resistivity (?25). Phase composition, microstructure, electrical property and electrical stability were investigated. All prepared ceramics have the phase with rock-salt structure and show typical NTC characteristics with B values higher than 5300K. The electrical stability with an optimized resistance-change rate of 1.02%after being aged at 150?C for 500 h is achieved. The electrical properties of the ceramics were analysed by combining X-ray photoelectron spectra with complex impedance spectra.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68583043","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}
Yinhao Li, Shuangyu Liu, Ping Lu, Mikhailovna Vasilieva, Fulong Zhang, Juan Hong
Viscosity of alumina slurry is a key factor affecting the quality of ceramics formed by stereo photolithography, but it is closely related to the resin distribution ratio, dispersant content, plasticizer content and solid content. Most researchers utilize the single factor method to study the composition and ratio of the slurry. In this study, orthogonal experimental design and back propagation artificial neural networks methods were combined to solve the optimisation problem of multi-objective and multi-factor influence on alumina slurry performances. The results of optimal composition and content allocation were achieved by back propagation artificial neural networks and experimental testing. It was shown that the optimal conditions are: resin composition HDDA : PPTTA = 4 : 1, DS-165A dispersant content of 3.86wt.%, PEG plasticiser amount of 3.5wt.% and the solid content of 75.74wt.%. The predicted optimal viscosity value was 8787mPa?s and the shrinkage rate could reach 14.57%. The optimal values of viscosity and shrinkage were consistent with the experimental results, the viscosity and shrinkage errors were only 4.06% and 3.856%, respectively. The average density and bending strength of the sintered samples were 3.979 ? 0.005 g/cm3 and 365 ? 61MPa, respectively. According to the obtained data, stereolithography 3D printing alumina slurry with excellent flowability and low shrinkage was successfully prepared.
{"title":"Viscosity optimisation of photosensitive al2o3 slurry for stereolithography based additive manufacturing","authors":"Yinhao Li, Shuangyu Liu, Ping Lu, Mikhailovna Vasilieva, Fulong Zhang, Juan Hong","doi":"10.2298/pac2301091l","DOIUrl":"https://doi.org/10.2298/pac2301091l","url":null,"abstract":"Viscosity of alumina slurry is a key factor affecting the quality of ceramics formed by stereo photolithography, but it is closely related to the resin distribution ratio, dispersant content, plasticizer content and solid content. Most researchers utilize the single factor method to study the composition and ratio of the slurry. In this study, orthogonal experimental design and back propagation artificial neural networks methods were combined to solve the optimisation problem of multi-objective and multi-factor influence on alumina slurry performances. The results of optimal composition and content allocation were achieved by back propagation artificial neural networks and experimental testing. It was shown that the optimal conditions are: resin composition HDDA : PPTTA = 4 : 1, DS-165A dispersant content of 3.86wt.%, PEG plasticiser amount of 3.5wt.% and the solid content of 75.74wt.%. The predicted optimal viscosity value was 8787mPa?s and the shrinkage rate could reach 14.57%. The optimal values of viscosity and shrinkage were consistent with the experimental results, the viscosity and shrinkage errors were only 4.06% and 3.856%, respectively. The average density and bending strength of the sintered samples were 3.979 ? 0.005 g/cm3 and 365 ? 61MPa, respectively. According to the obtained data, stereolithography 3D printing alumina slurry with excellent flowability and low shrinkage was successfully prepared.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68582455","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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