Processing and Application of Ceramics最新文献_第2页

Structure and optical properties of La-doped ZnO thin films at room temperature 室温下la掺杂ZnO薄膜的结构和光学性质

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302107s

I. Sugihartono, B. Soegijono, E. Handoko, T. Tiam, A. Umar

引用次数: 0

Heavily doped high-entropy A2B2O7 pyrochlore 高掺杂高熵A2B2O7焦绿石

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302113m

B. Matović, J. Maletaskic, V. Maksimović, J. Zagorac, Aleksandar Luković, Yuping Zeng, I. Cvijović-Alagić

引用次数: 0

Investigation of the effect of pressure, sintering temperature and time on silicon carbide microstructure 压力、烧结温度和时间对碳化硅显微组织影响的研究

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302189y

Z. Yaşar, V. Delucca, R. Haber

引用次数: 0

Thermal fatigue characteristics of 8Y2O3-ZrO2, La2Zr2O7, La2(Zr0.7Ce0.3)2O7 and La2Ce2O7 thermal barrier coatings in duplex, multilayer functionally graded and multilayer configurations 8Y2O3-ZrO2、La2Zr2O7、La2(Zr0.7Ce0.3)2O7和La2Ce2O7热障涂层双相、多层功能梯度和多层结构的热疲劳特性

4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2303236p

Kirti Pasupuleti, Kevin Vattappara, Sylvester Gomes, Parvati Ramaswamy

{"title":"Thermal fatigue characteristics of 8Y2O3-ZrO2, La2Zr2O7, La2(Zr0.7Ce0.3)2O7 and La2Ce2O7 thermal barrier coatings in duplex, multilayer functionally graded and multilayer configurations","authors":"Kirti Pasupuleti, Kevin Vattappara, Sylvester Gomes, Parvati Ramaswamy","doi":"10.2298/pac2303236p","DOIUrl":"https://doi.org/10.2298/pac2303236p","url":null,"abstract":"La2Zr2O7, La2(Zr0.7Ce0.3)2O7 and La2Ce2O7 pyrochlore plasma sprayable powders were synthesized and plasma spray coated on steel plates with NiCrAlY bond coat. Three different configurations were used: duplex, multilayer functionally graded and multilayer, with different combinations of commercial 8% yttria stabilized zirconia (8YSZ) and NiCrAlY (bond coat) layers. The prepared coatings were compared with the standard duplex 8YSZ thermal barrier coatings (TBCs) with a goal to study their suitability to serve as TBCs. TBCs? layer thicknesses and interfaces were studied via SEM on polished cross section metallographic samples removed from the spray coated TBCs. Thermal fatigue resistance was evaluated by directing a gas flame on the ceramic surface at 1200 and 1400 ?C, followed by its rapid withdrawal and forced cooling by pedestal fan. The maximum number of thermal shock cycles the coatings could withstand before failure was determined. The multilayered TBCs with lanthanum cerate composition stacked with 8YSZ exhibited the superior thermal fatigue resistance characteristics compared to all other studied TBCs. The findings were correlated with the crystalline phases of the ceramic coatings, obtained via XRD, and discussed in the light of existing literature.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"139 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":"135263530","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

Study of phase evolution and dielectric properties of Sr2Mn0.7Sn0.3O4 Sr2Mn0.7Sn0.3O4的相演化及介电性能研究

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302181n

G. Nirala, S. Upadhyay

{"title":"Study of phase evolution and dielectric properties of Sr2Mn0.7Sn0.3O4","authors":"G. Nirala, S. Upadhyay","doi":"10.2298/pac2302181n","DOIUrl":"https://doi.org/10.2298/pac2302181n","url":null,"abstract":"Ruddlesden-Popper oxide Sr2Mn0.7Sn0.3O4 was synthesized by solid state method by calcining at different temperatures between 1200 and 1500?C. The phase evolution during thermal treatments was investigated and it was shown that the powder calcined at 1500?C and ceramics sintered at 1500?C have single phase structure. Rietveld refinement of the XRD data confirmed tetragonal crystal structure having a = b = 3.9425 ? and c = 12.1230? lattice parameters and I4/mmm space group symmetry. Permittivity (?), impedance (Z*), dissipation factor (tan ?) and AC conductivity (?AC) of the samples were studied in the frequency range 1 kHz-2MHz and temperature range 60-600?C. An equivalent circuit comprising two parallel R-L elements and one constant phase element (CPE) model fitted the impedance data very well. Components of the equivalent circuit were correlated with compositional micro inhomogeneities in the sintered sample. Resonance-like feature observed in the dissipation factor at a particular temperature is attributed to the cancellation of capacitive and inductive reactants. Negative permittivity and loss of the sintered sample were compared with other ceramic oxides showing negative permittivity.","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":"68583834","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

Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC La1.75Y0.25Mo2-xAlxO9-δ中温SOFC固体电解质的制备与表征

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2301031t

C. Tian, Minzheng Zhu, Lingbo Shao, Xiaoling Qu, Lejie Zhu, Chao Chen, Caoli Wang, Yang Liu

{"title":"Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC","authors":"C. Tian, Minzheng Zhu, Lingbo Shao, Xiaoling Qu, Lejie Zhu, Chao Chen, Caoli Wang, Yang Liu","doi":"10.2298/pac2301031t","DOIUrl":"https://doi.org/10.2298/pac2301031t","url":null,"abstract":"Yttrium and aluminium co-substitutions on lanthanum molybdate ceramics with the nominal formula La1.75Y0.25Mo2-xAlxO9-?? (LYMA, x = 0, 0.1, 0.2, 0.3 and 0.4) were synthesized by citric acid-nitrate combustion method and used for preparation of solid electrolyte for intermediate-temperature solid oxide fuel cells (ITSOFCs). Phase composition, structure, conductivity and electrical properties of LYMA have been investigated as a function of aluminium content by X-ray diffraction, scanning electron microscopy and electrochemical impedance spectroscopy, respectively. Experimental results showed that the substitution of La and Mo with appropriate amounts of Y and Al can effectively stabilize the ?-form of La2Mo2O9 at room temperature and inhibit its phase transition to ?-form. The LYMA synthesized by combustion method exhibited a better sinterability where relative density of the samples sintered at 950?C for 4 h was higher than 95%TD. The performance of the LYMA electrolyte was found to be related to Al-content. The La1.75Y0.25Mo1.8Al0.2O8.7 exhibited high oxide ion conductivity (?= 42mS/cm at 800?C) and low electrical activation energy (Ea = 1.18 eV). These preliminary results indicate that the LYMA is a promising electrolyte for IT-SOFCs.","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":"68582686","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

Low temperature synthesis of NaSICON NaZr2(PO4)3 powders with the assistance of in situ formed mineralizer 原位成形矿化剂辅助下低温合成NaSICON NaZr2(PO4)3粉体

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2302140w

Tao Wang, Jianmin Liu, Feng Jiang, Guo Feng, Jianye Liang, L. Miao, Qian Wu, Xinbin Lao, Mengting Liu, Weihui Jiang

引用次数: 0

Review on thermal conductivity of SiCf/SiC composites for nuclear applications 核用SiCf/SiC复合材料导热性能研究进展

4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2303203g

Weina Guo, Yantao Gao

引用次数: 0

Structure and dielectric properties of Lu-doped SrBi2Ta2O9 synthesized by the molten salt method 熔盐法制备掺镧SrBi2Ta2O9的结构和介电性能

4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2303256a

Mohamed Afqir, Didier Fasquelle, Amina Tachafine, Yingzhi Meng, Mohamed Elaatmani, Abdelouahad Zegzouti, Abdelhamid Oufakir, Mohamed Daoud

{"title":"Structure and dielectric properties of Lu-doped SrBi2Ta2O9 synthesized by the molten salt method","authors":"Mohamed Afqir, Didier Fasquelle, Amina Tachafine, Yingzhi Meng, Mohamed Elaatmani, Abdelouahad Zegzouti, Abdelhamid Oufakir, Mohamed Daoud","doi":"10.2298/pac2303256a","DOIUrl":"https://doi.org/10.2298/pac2303256a","url":null,"abstract":"Lu-doped SrBi2Ta2O9 (SrBi2-xLuxTa2O9 where x = 0, 0.025, 0.05, 0.75 and 0.1) powders were synthesized by combination of molten salt method and solid-state route. FTIR, Raman and XRD techniques were performed to follow the transformation of reactants into the desired products. Characterization of all samples shows pure and single-phase orthorhombic structured materials obtained with plate-like morphology that is composed of fine and coarse-grained particles. The prepared powders were pressed and sintered at different temperatures up to 1200?C. Microstructure of the sintered samples is also likely to be affected by doping. The first study of dielectric measurements describes the effect of the application of DC bias, at roomtemperature, on the undoped and Lu-doped ceramics and shows that there is little or no effect of DC bias. The sample SrBi1.95Lu0.05Ta2O9 had maximal dielectric constant (??) and minimal dielectric loss (tan?). In the second part of this work, the temperature dependence of ?? and tan_ was considered. It was concluded that Lu-doping not only reduces the Curie temperature, but also brings a diffused phase transition, showing a crossover between displacive and diffusive behaviour.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"86 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":"135263534","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

Processing and electrical conductivity property of lithium-doped high-entropy pyrochlore and perovskite ceramics 掺锂高熵焦绿石和钙钛矿陶瓷的制备及其导电性

4区材料科学

Processing and Application of Ceramics Pub Date : 2023-01-01 DOI: 10.2298/pac2303264k

Yazhou Kong, Shihang Hu, Chengcheng Cai, Zexiong Wang, Shuai Zhang

{"title":"Processing and electrical conductivity property of lithium-doped high-entropy pyrochlore and perovskite ceramics","authors":"Yazhou Kong, Shihang Hu, Chengcheng Cai, Zexiong Wang, Shuai Zhang","doi":"10.2298/pac2303264k","DOIUrl":"https://doi.org/10.2298/pac2303264k","url":null,"abstract":"Lithium-doped Li0.66La1.12(Ti0.2Zr0.2Hf0.2Sn0.2Nb0.2)2O7 (LLTNO), Li0.66La1.12(Ti0.2Zr0.2Hf0.2Sn0.2Ta0.2)2O7 (LLTTO) high-entropy pyrochlore and Li0.5Sr0.5(Ti0.2Zr0.2Hf0.2Sn0.2Ta0.2)O3 (LSTTO), Li0.5Ba0.5(Ti0.2Zr0.2Hf0.2Sn0.2Nb0.2)O3 (LBTNO) high-entropy perovskite ceramics were synthesized by solid state reaction method and sintered. Crystal structure, microstructure and electrical properties of these high entropy ceramics were studied. The LLTNO and LLTTO pellets sintered at 1300 ?C present a pyrochlore structure, while LSTTO and LBTNO pellets sintered at 1350 ?C present a perovskite structure. The LBTNO ceramics has a total conductivity of 1.25 ? 10?7 S?cm?1 at room temperature while the LSTTO sample exhibits the highest conductivity of 2.11 ? 10?7 S?cm?1 among all samples. Both LSTTO and LBTNO ceramics present negligible electronic conductivity. Relative densities of the LLTNO, LLTTO, LSTTO and LBTNO ceramics were 82, 88, 86 and 87%TD, respectively, which is the reason for low conductivity of these high entropy ceramics. The activation energies of the LSTTO and LBTNO samples were 0.39 and 0.38 eV, respectively, which is close to the traditional Li+-type conducting solid electrolytes.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"15 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":"135263539","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