Journal of Asian Ceramic Societies最新文献_第4页

Influence of Na2SO4 molten salts on the self-healing behavior of Ni/Al2O3 composites Na2SO4熔盐对Ni/Al2O3复合材料自修复行为的影响

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-08-28 DOI: 10.1080/21870764.2023.2251248

D. Maruoka, K. Harada, T. Murakami, E. Kasai

{"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}

引用次数: 0

Effect of the heating rate on crystallization and densification of TiO2 films prepared from alkoxide solutions containing various organic additives 加热速率对含各种有机添加剂的醇盐溶液制备的TiO2薄膜结晶和致密化的影响

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-08-28 DOI: 10.1080/21870764.2023.2252230

Hiroaki Uchiyama, Yuji Tanaka, Shouta Mizuguchi

引用次数: 0

Optical and mechanical properties characterizations of transparent polycrystalline MgAl2O4 spinel 透明多晶MgAl2O4尖晶石的光学和力学性能表征

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-08-28 DOI: 10.1080/21870764.2023.2248714

Sawao Honda, Yuki Ogihara, A. Ikesue, Y. Aung, Shinobu Hashomoto, Y. Iwamoto

引用次数: 0

Development of hybrid multi-head, multi-material paste and ink extrusion type 3D printer for biomedical applications 用于生物医学应用的混合式多头、多材料膏体和油墨挤出型3D打印机的开发

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-08-17 DOI: 10.1080/21870764.2023.2247210

Jishita Ravoor, S. Elsen, Mahendran Thangavel, Dhanabal Arumugam, Deepan Karuppan

{"title":"Development of hybrid multi-head, multi-material paste and ink extrusion type 3D printer for biomedical applications","authors":"Jishita Ravoor, S. Elsen, Mahendran Thangavel, Dhanabal Arumugam, Deepan Karuppan","doi":"10.1080/21870764.2023.2247210","DOIUrl":"https://doi.org/10.1080/21870764.2023.2247210","url":null,"abstract":"ABSTRACT Additive manufacturing is a fabrication technique where materials are built up layer-by-layer allowing the realization of complex designs. Ceramic additive manufacturing is steadily increasing in the market and industries are developing 3D printers that are economical and efficient to print single/multi-material. The development of free-form extrusion-type printers has been of great significance due to their wide range of materials used, availability of technology, low development cost, and design freedom in developing the structures. We have successfully developed a hybrid multi-head 3D printer with four print heads capable of operating individually or together to print multiple layers using different materials. The three mechanically actuated print heads are provided to print ceramic, metallic slurry, and polymeric materials, and one pneumatic actuated print head is for printing bio-ink. The developed hybrid multi-head 3D printer can be beneficial in printing a wide range of materials such as metals, ceramics, polymers, and composites due to its flexibility in printing materials of different viscosities at different pressure. The optimization of the printing of calcium silicate bio-ceramics and multi-material is also studied and reported.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44997460","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}

引用次数: 0

Melt pool size of optical glass irradiated by semiconductor laser 半导体激光辐照光学玻璃熔池尺寸

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-07-03 DOI: 10.1080/21870764.2023.2236449

Weijie Fu, Lianshuang Ning, X. Zhou, Xinming Zhang

引用次数: 0

Effect of Sr-doping on electronic and thermal properties of Pr2-xSrxFeCrO6 (0≤x≤1) oxide materials synthesized by using sol-gel technique sr掺杂对溶胶-凝胶法制备Pr2-xSrxFeCrO6(0≤x≤1)氧化物材料电子性能和热性能的影响

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-07-03 DOI: 10.1080/21870764.2023.2245610

Lav Kush, S. Srivastava, S. Vajpai, S. Savilov

{"title":"Effect of Sr-doping on electronic and thermal properties of Pr2-xSrxFeCrO6 (0≤x≤1) oxide materials synthesized by using sol-gel technique","authors":"Lav Kush, S. Srivastava, S. Vajpai, S. Savilov","doi":"10.1080/21870764.2023.2245610","DOIUrl":"https://doi.org/10.1080/21870764.2023.2245610","url":null,"abstract":"ABSTRACT The thermoelectric properties of a new type of Pr2-xSrxFeCrO6 double perovskite were investigated at higher temperature after its sol-gel synthesis. The XRD results validate the single-phase orthorhombic structure, and the crystallite sizes meet the morphological measurements. XPS examination, which formed the defect sites in these oxides, confirmed the varied oxidation states of constituents. The temperature-dependent electrical conductivity (σ) was poor in the original Pr2FeCrO6 composition, but after substituting Sr on the Pr-site, a significant rise in σ with two semiconductors and one metal transition was observed. A positive Seebeck coefficient confirmed the presence of a p-type charge carrier in the entire composition, and the charge transport mechanism was driven by the SPH model. Thermal conductivity increases in all doped samples, while it decreases in pristine compounds over the broad analyzed temperature range. Thermal expansion coefficient increased after doping in oxygen-deficient compound. The PrSrFeCrO6 compound had the maximum ZT (0.105), which was 3.9 times higher than that of the pristine compound.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"11 1","pages":"300 - 315"},"PeriodicalIF":2.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42956945","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}

引用次数: 1

A Synergic Effect of Bi-metallic Layered Hydro-Oxide Cocatalyst on 1-D TiO2 Driven Photoelectrochemical Water Splitting 双金属层状hydrooxide助催化剂对一维TiO2驱动的光电化学水分解的协同效应

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-07-03 DOI: 10.1080/21870764.2023.2237358

R. Ali, Qadeer Akbar Sial, Young Jae Lee, Muhammad Waqas, S. Kalanur, H. Seo

{"title":"A Synergic Effect of Bi-metallic Layered Hydro-Oxide Cocatalyst on 1-D TiO2 Driven Photoelectrochemical Water Splitting","authors":"R. Ali, Qadeer Akbar Sial, Young Jae Lee, Muhammad Waqas, S. Kalanur, H. Seo","doi":"10.1080/21870764.2023.2237358","DOIUrl":"https://doi.org/10.1080/21870764.2023.2237358","url":null,"abstract":"ABSTRACT Photoelectrochemical (PEC) water splitting is one of the most sustainable approaches for converting solar energy into hydrogen fuel. Affordable and robust photoelectrodes are crucial for the commercialization of PEC technologies. Recently, transition metal-based co-catalysts, especially Ni- and Fe-based catalysts, have attracted much interest owing to their exceptional OER characteristics. Given this, we here proposed the decoration of a Fe-Ni-based cocatalyst on the surface of the TiO2 photoanode for PEC water splitting. The TiO2 photoanode was hydrothermally synthesized and then decorated by Fe-Ni hydroxide catalyst using photo-assisted electrodeposition. The optimized TiO2/FeNiOOH photoanode exhibited the maximum photocurrent density value of 1.36 mA cm−2, which is almost twice the value obtained for bare TiO2, at 1.23 V vs RHE under the AM 1.5 G illumination. Due to the enhanced light absorption in the UV region, the optimized photoanode exhibited remarkable IPCE and photoconversion efficiency of 87.8% and 0.93%, respectively. Furthermore, excellent faradaic efficiencies of ∼90% for H2 and ∼70% for O2 generations were obtained. Predominantly, the enhancement in the photocurrent potentials was explained in detail. Our study shows the roles and benefits of using bimetallic catalysts with TiO2 photoanodes for sustainable water-splitting applications.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"11 1","pages":"424 - 435"},"PeriodicalIF":2.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46457266","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}

引用次数: 1

Electrocatalytic property of Zn-Al layered double hydroxides for CO2 electrochemical reduction Zn-Al层状双氢氧化物对CO2电化学还原的电催化性能

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-07-03 DOI: 10.1080/21870764.2023.2236441

Noboru Yamaguchi, Ryosuke Nakazato, Keeko Matsumoto, Masako Kakesu, N. Rosero-Navarro, A. Miura, K. Tadanaga

{"title":"Electrocatalytic property of Zn-Al layered double hydroxides for CO2 electrochemical reduction","authors":"Noboru Yamaguchi, Ryosuke Nakazato, Keeko Matsumoto, Masako Kakesu, N. Rosero-Navarro, A. Miura, K. Tadanaga","doi":"10.1080/21870764.2023.2236441","DOIUrl":"https://doi.org/10.1080/21870764.2023.2236441","url":null,"abstract":"ABSTRACT Electrocatalytic CO2 reduction reaction (CO2RR) has attracted considerable attention as a technology to recycle carbon dioxide (CO2) into raw materials for chemicals using renewable energies. In this study, the electrocatalytic CO2RR activity of Zn-Al layered double hydroxides (LDHs) was studied. Zn-Al LDHs loaded carbon sheets were prepared, and CO2 RR was performed using CO2-saturated KHCO3 electrolyte to confirm the catalytic ability of Zn-Al LDH. Zn-Al LDHs intercalated with CO3 2− anion were synthesized using the mixture of metal nitrates with the different molar ratio of Zn2+/Al3+ by the co-precipitation process, whose corresponding products were named as Zn2Al1 LDH, Zn3Al1 LDH, and Zn4Al1 LDH, respectively. Except for Zn2Al1 LDH, ZnO was observed to exist as an impurity. The synthesized Zn-Al LDHs exhibited the electrocatalytic CO2RR activity for CO formation. In the case of the Zn2Al1 LDH, the current density of 15 mA cm−2 was obtained with 77% selectivity for CO and 94% selectivity for (CO + H2) at − 1.4 V vs. RHE. Furthermore, Zn3Al1 and Zn4Al1 LDHs showed a significant change relating to ZnO impurities in the XRD patterns and SEM images before and after the CO2RR whereas Zn2Al1 LDH did not show it. These results indicate that Zn-Al LDH is promising as a CO2RR electrocatalyst for CO formation.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"11 1","pages":"406 - 411"},"PeriodicalIF":2.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46103938","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}

引用次数: 0

Synthesis, densification, and cation inversion in high entropy (Co,Cu,Mg,Ni,Zn)Al2O4 spinel 高熵(Co,Cu,Mg,Ni,Zn)Al2O4尖晶石的合成、致密化及阳离子转化

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-06-29 DOI: 10.1080/21870764.2023.2227535

C. Corlett, N. Obradović, J. Watts, E. Bohannan, W. Fahrenholtz

引用次数: 0

Effect of sintering temperatures on temperature coefficient of capacitance of KCa2Nb3O10 bulk-layered perovskite 烧结温度对KCa2Nb3O10块体层状钙钛矿电容温度系数的影响

IF 2.3 4区材料科学

Journal of Asian Ceramic Societies Pub Date : 2023-06-27 DOI: 10.1080/21870764.2023.2228090

Jeong-Yeon Kim, Gyo-Hee Hong, Se Yun Kim, Seong-Mee Hwang, W. Shin, W. Seo, Sang‐il Kim, Hyun-sik Kim

{"title":"Effect of sintering temperatures on temperature coefficient of capacitance of KCa2Nb3O10 bulk-layered perovskite","authors":"Jeong-Yeon Kim, Gyo-Hee Hong, Se Yun Kim, Seong-Mee Hwang, W. Shin, W. Seo, Sang‐il Kim, Hyun-sik Kim","doi":"10.1080/21870764.2023.2228090","DOIUrl":"https://doi.org/10.1080/21870764.2023.2228090","url":null,"abstract":"ABSTRACT Multilayer ceramic capacitors (MLCCs) for electric vehicles require their room temperature capacitance to change ≤ ±15% at −55°C to 200°C. The dielectric constant (ε) of BaTiO3, a dielectric material widely used in MLCCs, drops at >125°C making its application to electric vehicles difficult. Here, we propose KCa2Nb3O10 (KCNO)-layered perovskite as a strong candidate for electric vehicle MLCCs as its ε does not change abruptly with temperature. The effect of sintering temperature on the temperature coefficient of capacitance (TCC) of KCNO is studied. The KCNO powder calcined at 900–1200°C is sintered at 1200°C–1300°C. Microstructure and temperature-dependent ε are determined by the sintering temperature, while the sintered density is related to the difference between the calcining and sintering temperatures. Only the room temperature ε of the samples sintered at 1300°C (except the one calcined at 900°C) varies ≤ ±15% at 25°C–200°C (ε ~250 at room temperature). The sample calcined at 1100°C and sintered at 1300°C has highly elongated grains and the highest activation energy. These factors are responsible for the TCC of the 1300°C sintered KCNO being ≤ ±15% at 25–200°C.","PeriodicalId":15130,"journal":{"name":"Journal of Asian Ceramic Societies","volume":"11 1","pages":"395 - 405"},"PeriodicalIF":2.3,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45924538","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}

引用次数: 0