Pub Date : 2023-11-17DOI: 10.1080/21870764.2023.2281723
S. Alfadhli, A.A.A. Darwish, S. A. Al-Ghamdi, Meshari M Aljohani, Seleim M. Seleim, Mohamed E. Mahmoud, Syed Khasim, Taymour A. Hamdalla
Traditional methods of synthesizing nanomaterials via physical or chemical methods are typically expensive and result in toxic byproducts that adversely affect the environment. In this study, we pr...
{"title":"Synthesis, characterization, optical, and sensing investigations for Fe-BDC doped with 10 wt.% of activated food waste biochar","authors":"S. Alfadhli, A.A.A. Darwish, S. A. Al-Ghamdi, Meshari M Aljohani, Seleim M. Seleim, Mohamed E. Mahmoud, Syed Khasim, Taymour A. Hamdalla","doi":"10.1080/21870764.2023.2281723","DOIUrl":"https://doi.org/10.1080/21870764.2023.2281723","url":null,"abstract":"Traditional methods of synthesizing nanomaterials via physical or chemical methods are typically expensive and result in toxic byproducts that adversely affect the environment. In this study, we pr...","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"10 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529023","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 : 2023-11-16DOI: 10.1080/21870764.2023.2264607
Jong-Ho Kim, Il-Gok Hong, Ho-Yong Shin, Hyo-Jun Ahn, Jong-In Im
In this study, the frequency and capacitance of piezoelectric materials due to compressive stress were analyzed, and the overall material properties (compliance matrix, piezoelectric charge constan...
{"title":"Parametric estimation analysis of compressive stress effects on piezoelectric properties of PZT ceramic","authors":"Jong-Ho Kim, Il-Gok Hong, Ho-Yong Shin, Hyo-Jun Ahn, Jong-In Im","doi":"10.1080/21870764.2023.2264607","DOIUrl":"https://doi.org/10.1080/21870764.2023.2264607","url":null,"abstract":"In this study, the frequency and capacitance of piezoelectric materials due to compressive stress were analyzed, and the overall material properties (compliance matrix, piezoelectric charge constan...","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"15 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529024","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 : 2023-11-15DOI: 10.1080/21870764.2023.2282810
Jong-Ho Kim, Il-Gok Hong, Ho-Yong Shin, Hyo-Jun Ahn, Jong-In Im
Piezoelectric sensors for underwater sonar require high hydrostatic piezoelectric properties (dh, gh and HFOM), and research is being conducted on various types of piezoelectric composites to impro...
{"title":"Hydrostatic piezoelectric properties of 1-3 type piezo-composite with a porous polymer matrix","authors":"Jong-Ho Kim, Il-Gok Hong, Ho-Yong Shin, Hyo-Jun Ahn, Jong-In Im","doi":"10.1080/21870764.2023.2282810","DOIUrl":"https://doi.org/10.1080/21870764.2023.2282810","url":null,"abstract":"Piezoelectric sensors for underwater sonar require high hydrostatic piezoelectric properties (dh, gh and HFOM), and research is being conducted on various types of piezoelectric composites to impro...","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"42 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529048","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 : 2023-10-06DOI: 10.1080/21870764.2023.2264608
Yuhang Du, Chenxi Song, Yulin Wei, Deli Ma, Baocai Pan, Mengyong Sun, Guopu Shi, Zhi Wang, Qinggang Li
Reducing the preparation cost of alumina ceramics has received significant attention, as alumina is one of the most widely used structural ceramics. In this study, corundum-based composite ceramics with a white corundum-to-zircon powder mass ratio of 7:3 were selected as the matrix. CeO2 and Y2O3 doped corundum-based composite ceramics were prepared via pressureless sintering. The total content of CeO2-Y2O3 was set at 10 wt% to study the effects of different temperatures and CeO2-Y2O3 ratios on the properties of the corundum-based composite ceramics. Physical phase and microstructural analyses of the corundum-based composite ceramics were performed using X-ray diffraction and scanning electron microscopy, respectively. The results showed that the sintering temperature of the corundum-based composite ceramics could be effectively reduced by using a solid solution of CeO2 and Y2O3. The best sintering temperature was 1400°C, and the best composition was 5 wt% CeO2-5 wt% Y2O3. The physical properties of the corundum-based composite ceramics prepared under these technological conditions include a flexural strength of 386.2 MPa, hardness of 13.5 GPa, density of 3.9128 g/cm3, linear shrinkage of 16.31% and an apparent porosity of 0.62%.
{"title":"Effect of CeO <sub>2</sub> -Y <sub>2</sub> O <sub>3</sub> sintering aids on the microstructure and properties of corundum-based composite ceramics","authors":"Yuhang Du, Chenxi Song, Yulin Wei, Deli Ma, Baocai Pan, Mengyong Sun, Guopu Shi, Zhi Wang, Qinggang Li","doi":"10.1080/21870764.2023.2264608","DOIUrl":"https://doi.org/10.1080/21870764.2023.2264608","url":null,"abstract":"Reducing the preparation cost of alumina ceramics has received significant attention, as alumina is one of the most widely used structural ceramics. In this study, corundum-based composite ceramics with a white corundum-to-zircon powder mass ratio of 7:3 were selected as the matrix. CeO2 and Y2O3 doped corundum-based composite ceramics were prepared via pressureless sintering. The total content of CeO2-Y2O3 was set at 10 wt% to study the effects of different temperatures and CeO2-Y2O3 ratios on the properties of the corundum-based composite ceramics. Physical phase and microstructural analyses of the corundum-based composite ceramics were performed using X-ray diffraction and scanning electron microscopy, respectively. The results showed that the sintering temperature of the corundum-based composite ceramics could be effectively reduced by using a solid solution of CeO2 and Y2O3. The best sintering temperature was 1400°C, and the best composition was 5 wt% CeO2-5 wt% Y2O3. The physical properties of the corundum-based composite ceramics prepared under these technological conditions include a flexural strength of 386.2 MPa, hardness of 13.5 GPa, density of 3.9128 g/cm3, linear shrinkage of 16.31% and an apparent porosity of 0.62%.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135351924","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 : 2023-09-21DOI: 10.1080/21870764.2023.2259544
Kaien Sun, Bo Zeng, Yi Qin, Chengjun Deng, Yi Yang, Kunlan Huang, Jie Wang
To improve the cutting performance and prolong the service life of a carbide-coated tool in the process of ductile iron machining, an electromagnetic coupling treatment (EMCT) was carried out. The cutting experiments show that the cutting force and cutting temperature are reduced after EMCT, and the roughness of the machined surface is reduced. It is found that after EMCT with optimal parameters the dislocation density, microscopic strain, microhardness and bonding strength of an alumina coating increase by 109.2%, 28.2%, 28.3% and 26.6%, respectively. Using the actual machining of a differential housing to verify the tool life, it is found that after EMCT, a single tool can process 18.4 more workpieces or in other words, the tool life increased by 44%. EMCT can promote element diffusion, optimize coating properties and have great potential in coating tool life extension.
{"title":"An electromagnetic coupling treatment for improving the cutting performance of cemented carbide-coated tools","authors":"Kaien Sun, Bo Zeng, Yi Qin, Chengjun Deng, Yi Yang, Kunlan Huang, Jie Wang","doi":"10.1080/21870764.2023.2259544","DOIUrl":"https://doi.org/10.1080/21870764.2023.2259544","url":null,"abstract":"To improve the cutting performance and prolong the service life of a carbide-coated tool in the process of ductile iron machining, an electromagnetic coupling treatment (EMCT) was carried out. The cutting experiments show that the cutting force and cutting temperature are reduced after EMCT, and the roughness of the machined surface is reduced. It is found that after EMCT with optimal parameters the dislocation density, microscopic strain, microhardness and bonding strength of an alumina coating increase by 109.2%, 28.2%, 28.3% and 26.6%, respectively. Using the actual machining of a differential housing to verify the tool life, it is found that after EMCT, a single tool can process 18.4 more workpieces or in other words, the tool life increased by 44%. EMCT can promote element diffusion, optimize coating properties and have great potential in coating tool life extension.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136153793","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 : 2023-09-18DOI: 10.1080/21870764.2023.2259149
Mahmoud S. Alkathy, Srinivas Pattipaka, Mansour K. Gatasheh, H. A. Kassim, Mohamed Saad Daoud, Jose A. Eiras
There is an immediate demand for eco-friendly, high-performance, and highly stable energy storage materials for pulse power systems. Ceramics based on SrTiO3 have a high breakdown strength (BDS) and dielectric constant. In this work, we fabricated a polycrystalline of Sr(1-x)(Nd, Li)xTiO3 ceramics via microwave-assisted heating of the starting materials. X-ray diffraction analysis reveals a pure perovskite phase without any secondary phase. Scanning electron microscopy images exhibit dense grain morphology with a decrease in grain size as the dopant concentration increases. The frequency dependences of the dielectric properties were studied in the frequency range of 100 Hz-1 MHz at room temperature. The polarization-electric field hysteresis loops were examined to ascertain the effect of co-doping on the energy-storage capability of SrTiO3 ceramics. After increasing the co-dopants from 0 to 8%, the energy density increased nine times (from 0.11 J/cm3 to 0.952 J/cm3), and the energy storage efficiency increased from 80.71% to 95.98%, respectively. In addition, the samples demonstrate excellent thermal stability, and their energy storage properties are stable up to 80°C. We may infer from this discovery that the bulk Nd3+ and Li+ co-doped SrTiO3 materials are good candidates for high-energy-density capacitor applications.
{"title":"Achieving high energy storage performance and efficiency in lead-free SrTiO <sub>3</sub> ceramics via neodymium and lithium co-doping technique","authors":"Mahmoud S. Alkathy, Srinivas Pattipaka, Mansour K. Gatasheh, H. A. Kassim, Mohamed Saad Daoud, Jose A. Eiras","doi":"10.1080/21870764.2023.2259149","DOIUrl":"https://doi.org/10.1080/21870764.2023.2259149","url":null,"abstract":"There is an immediate demand for eco-friendly, high-performance, and highly stable energy storage materials for pulse power systems. Ceramics based on SrTiO3 have a high breakdown strength (BDS) and dielectric constant. In this work, we fabricated a polycrystalline of Sr(1-x)(Nd, Li)xTiO3 ceramics via microwave-assisted heating of the starting materials. X-ray diffraction analysis reveals a pure perovskite phase without any secondary phase. Scanning electron microscopy images exhibit dense grain morphology with a decrease in grain size as the dopant concentration increases. The frequency dependences of the dielectric properties were studied in the frequency range of 100 Hz-1 MHz at room temperature. The polarization-electric field hysteresis loops were examined to ascertain the effect of co-doping on the energy-storage capability of SrTiO3 ceramics. After increasing the co-dopants from 0 to 8%, the energy density increased nine times (from 0.11 J/cm3 to 0.952 J/cm3), and the energy storage efficiency increased from 80.71% to 95.98%, respectively. In addition, the samples demonstrate excellent thermal stability, and their energy storage properties are stable up to 80°C. We may infer from this discovery that the bulk Nd3+ and Li+ co-doped SrTiO3 materials are good candidates for high-energy-density capacitor applications.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135149031","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 : 2023-08-30DOI: 10.1080/21870764.2023.2251245
V. Anand, A. Chaudhary, Meenakshi, Gaurav Bhatia, Pawan Heera, S. Thakur
ABSTRACT The co-precipitation method is used in the lab to create a sample of the ferromagnetic 45CaO-30P2O5-15SiO2-10Fe2O3 (mol%). In simulated body fluid (SBF), the ability of the ferromagnetic sample to regenerate bone was examined, and XRD and FTIR graphs demonstrate that bone formation has taken place. The Vibration Sample Magnetometer has confirmed that the sample’s ferromagnetic behavior was brought on by the presence of iron (VSM). When an external magnetic field is present, the resulting sample may be utilized to treat bone cancer due to its ferromagnetic nature (hyperthermia). The sample’s drug release is therefore tested both with and without the help of an external magnetic field, and the findings reveal that when the magnetic field is present, the sample displays good drug release. BET analysis also supports the capacity of drugs to load and release. The sample’s ability to distribute drugs is tested using the antibiotic gentamicin. The prolonged release of the medication in SBF solution is investigated using a first-order kinetic equation. Being a drug-loaded ferromagnetic sample with high magnetic attraction, makes it simple to target any nearby spot. With a cytotoxicity rate of more than 90%, the produced sample is seen to interact amicably with the MG-63 human cell line. According to antimicrobial research, samples also guard against both gram-positive and gram-negative germs in the implant region. By lowering the cell’s oxidative stress, the sample’s antioxidant activity aids in cell proliferation, which increases the implanted site’s recuperation.
{"title":"Magnetic biomaterials with nanostructures for improved medication delivery and bone regeneration. First-level investigation","authors":"V. Anand, A. Chaudhary, Meenakshi, Gaurav Bhatia, Pawan Heera, S. Thakur","doi":"10.1080/21870764.2023.2251245","DOIUrl":"https://doi.org/10.1080/21870764.2023.2251245","url":null,"abstract":"ABSTRACT The co-precipitation method is used in the lab to create a sample of the ferromagnetic 45CaO-30P2O5-15SiO2-10Fe2O3 (mol%). In simulated body fluid (SBF), the ability of the ferromagnetic sample to regenerate bone was examined, and XRD and FTIR graphs demonstrate that bone formation has taken place. The Vibration Sample Magnetometer has confirmed that the sample’s ferromagnetic behavior was brought on by the presence of iron (VSM). When an external magnetic field is present, the resulting sample may be utilized to treat bone cancer due to its ferromagnetic nature (hyperthermia). The sample’s drug release is therefore tested both with and without the help of an external magnetic field, and the findings reveal that when the magnetic field is present, the sample displays good drug release. BET analysis also supports the capacity of drugs to load and release. The sample’s ability to distribute drugs is tested using the antibiotic gentamicin. The prolonged release of the medication in SBF solution is investigated using a first-order kinetic equation. Being a drug-loaded ferromagnetic sample with high magnetic attraction, makes it simple to target any nearby spot. With a cytotoxicity rate of more than 90%, the produced sample is seen to interact amicably with the MG-63 human cell line. According to antimicrobial research, samples also guard against both gram-positive and gram-negative germs in the implant region. By lowering the cell’s oxidative stress, the sample’s antioxidant activity aids in cell proliferation, which increases the implanted site’s recuperation.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48535599","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 : 2023-08-29DOI: 10.1080/21870764.2023.2251243
Y. Hayashi, Tatsuya Shishido, Kento Seki, H. Takizawa
ABSTRACT A barium titanium oxide/silver (BaTiO3/Ag) nanocomposite powder was synthesized using a sonochemical process. By irradiating an ethanol solution of BaTiO3 and silver oxide (Ag2O), Ag2O thermally decomposed at 40°C and Ag-loaded BaTiO3 nanocomposites powder was obtained. Nanocomposites containing 30 vol% Ag sintered at 1000°C showed near densities and higher dielectric constants compared to those of BaTiO3 sintered at 1300°C. Moreover, percolation did not occur because the Ag nanoparticles were uniformly dispersed and loaded onto the surface of BaTiO3. This sonochemical method is expected to be a new process for obtaining uniformly dispersed and loaded nanocomposite powders without percolation, even in large amounts.
{"title":"Synthesis of BaTiO3/Ag nanocomposites using a sonochemical process and low-temperature sintering","authors":"Y. Hayashi, Tatsuya Shishido, Kento Seki, H. Takizawa","doi":"10.1080/21870764.2023.2251243","DOIUrl":"https://doi.org/10.1080/21870764.2023.2251243","url":null,"abstract":"ABSTRACT A barium titanium oxide/silver (BaTiO3/Ag) nanocomposite powder was synthesized using a sonochemical process. By irradiating an ethanol solution of BaTiO3 and silver oxide (Ag2O), Ag2O thermally decomposed at 40°C and Ag-loaded BaTiO3 nanocomposites powder was obtained. Nanocomposites containing 30 vol% Ag sintered at 1000°C showed near densities and higher dielectric constants compared to those of BaTiO3 sintered at 1300°C. Moreover, percolation did not occur because the Ag nanoparticles were uniformly dispersed and loaded onto the surface of BaTiO3. This sonochemical method is expected to be a new process for obtaining uniformly dispersed and loaded nanocomposite powders without percolation, even in large amounts.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47674868","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 : 2023-08-28DOI: 10.1080/21870764.2023.2251248
D. Maruoka, K. Harada, T. Murakami, E. Kasai
ABSTRACT The objective of this study is to investigate the influence of Na2SO4 molten salt on the self-healing behavior of Ni/Al2O3 for its utilization as the middle pressure ceramic turbine blades of aircraft. Dense 5 vol% Ni/Al2O3 was prepared and cracks were introduced by the Vickers indentations. The samples were heat-treated ranging from 1000°C to 1150°C for 0.5 h to 48 h in air with Na2SO4 molten salt. The crack lengths of samples before/after the heat treatment were measured using scanning electron microscope (SEM) and the crack disappearance rate was calculated. X-ray diffraction (XRD) results show same peaks in the samples heat-treated with and without Na2SO4 molten salt. The crack disappearance rate of sample heat-treated with Na2SO4 molten salt is higher than that without molten salt and increases according to the parabolic manner. The apparent activation energies for crack disappearance are 354 kJ/mol for the sample heat-treated with Na2SO4 molten salt and 390 kJ/mol for that without Na2SO4 molten salt. The bending strength of the sample heat-treated with Na2SO4 molten salt is equivalent to that of the original sample. Ni/Al2O3 composite exhibits excellent corrosion resistance and self-healing function even in coexistence with Na2SO4 molten salt.
{"title":"Influence of Na2SO4 molten salts on the self-healing behavior of Ni/Al2O3 composites","authors":"D. Maruoka, K. Harada, T. Murakami, E. Kasai","doi":"10.1080/21870764.2023.2251248","DOIUrl":"https://doi.org/10.1080/21870764.2023.2251248","url":null,"abstract":"ABSTRACT The objective of this study is to investigate the influence of Na2SO4 molten salt on the self-healing behavior of Ni/Al2O3 for its utilization as the middle pressure ceramic turbine blades of aircraft. Dense 5 vol% Ni/Al2O3 was prepared and cracks were introduced by the Vickers indentations. The samples were heat-treated ranging from 1000°C to 1150°C for 0.5 h to 48 h in air with Na2SO4 molten salt. The crack lengths of samples before/after the heat treatment were measured using scanning electron microscope (SEM) and the crack disappearance rate was calculated. X-ray diffraction (XRD) results show same peaks in the samples heat-treated with and without Na2SO4 molten salt. The crack disappearance rate of sample heat-treated with Na2SO4 molten salt is higher than that without molten salt and increases according to the parabolic manner. The apparent activation energies for crack disappearance are 354 kJ/mol for the sample heat-treated with Na2SO4 molten salt and 390 kJ/mol for that without Na2SO4 molten salt. The bending strength of the sample heat-treated with Na2SO4 molten salt is equivalent to that of the original sample. Ni/Al2O3 composite exhibits excellent corrosion resistance and self-healing function even in coexistence with Na2SO4 molten salt.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45190903","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 : 2023-08-28DOI: 10.1080/21870764.2023.2252230
Hiroaki Uchiyama, Yuji Tanaka, Shouta Mizuguchi
ABSTRACT The effect of the heating rate on crystallization and densification of sol–gel-derived TiO2 films has been investigated. The TiO2 gel films were prepared from Ti(OC3H7 i )4 solutions containing alcohols (2-butanol and 2-methoxyethanol), glycols (propylene glycol, diethylene glycol and dipropylene glycol) and chelating agents (acetylacetone and benzoylacetone) as organic additives, followed by heat treatment to 800°C at various heating rates. In the cases without organic additives and with alcohols, anatase films were obtained irrespective of the heating rate, where the refractive indexes of the films were higher for slower heating rate. Conversely, for the films prepared with glycols and chelating agents, rapid heating activated crystallization and densification. In particular, addition of chelating agents led to the formation of rutile films with much higher refractive indexes than those of the anatase films.
{"title":"Effect of the heating rate on crystallization and densification of TiO2 films prepared from alkoxide solutions containing various organic additives","authors":"Hiroaki Uchiyama, Yuji Tanaka, Shouta Mizuguchi","doi":"10.1080/21870764.2023.2252230","DOIUrl":"https://doi.org/10.1080/21870764.2023.2252230","url":null,"abstract":"ABSTRACT The effect of the heating rate on crystallization and densification of sol–gel-derived TiO2 films has been investigated. The TiO2 gel films were prepared from Ti(OC3H7 i )4 solutions containing alcohols (2-butanol and 2-methoxyethanol), glycols (propylene glycol, diethylene glycol and dipropylene glycol) and chelating agents (acetylacetone and benzoylacetone) as organic additives, followed by heat treatment to 800°C at various heating rates. In the cases without organic additives and with alcohols, anatase films were obtained irrespective of the heating rate, where the refractive indexes of the films were higher for slower heating rate. Conversely, for the films prepared with glycols and chelating agents, rapid heating activated crystallization and densification. In particular, addition of chelating agents led to the formation of rutile films with much higher refractive indexes than those of the anatase films.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45662757","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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