Processing and Application of Ceramics最新文献_第10页

Doping effects in (Ba0.85Ca0.15)(Hf0.1Ti0.9)O3 lead-free piezoelectric ceramics prepared via powder injection moulding using simple binder 简单粘结剂粉末注射法制备(Ba0.85Ca0.15)(Hf0.1Ti0.9)O3无铅压电陶瓷的掺杂效应

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/PAC2101047W

Can Wang, B. Fang, Shuai Zhang, Xiaolong Lu, Jianning Ding

{"title":"Doping effects in (Ba0.85Ca0.15)(Hf0.1Ti0.9)O3 lead-free piezoelectric ceramics prepared via powder injection moulding using simple binder","authors":"Can Wang, B. Fang, Shuai Zhang, Xiaolong Lu, Jianning Ding","doi":"10.2298/PAC2101047W","DOIUrl":"https://doi.org/10.2298/PAC2101047W","url":null,"abstract":"To improve densification of the (Ba0.85Ca0.15)(Hf0.1Ti0.9)O3 (BCHT) ceramics prepared via powder injection moulding, MnO2 and Li2CO3 were used as sintering aids. The BCHT ceramics doped with different Mn- and Li-amount prepared by powder injection moulding in which paraffin was used as injection binder, have rather pure perovskite structure with complicated polymorphic ferroelectric phase coexistence. Polyhedral grains combined with nearly round shape grains with increased relative density and larger gains size were obtained at appropriate doping amount, related to the formation of liquid phase during sintering and increased mobility of ions due to the generation of point defects caused by heterovalent cations doping. TheMn- and Li-doped BCHT ceramics are displacement driven ferroelectrics with apparent diffused transition characteristic at different extent, relating to the morphotropic phase boundary composition and the variation of point defects induced by doping. Comparable or surpassing electrical performance was acquired, especially the dielectric breakdown strength was increased due to the improved sinterability. With appropriate doping amount, piezoelectricity larger than 300 pC/N can be obtained in the Mn- and Li-doped BCHT ceramics poled under low electric field.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"15 1","pages":"47-57"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68578406","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: 3

Nb2O5 nanoparticles obtained by microwave assisted combustion synthesis under different conditions 不同条件下微波辅助燃烧合成Nb2O5纳米颗粒

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/pac2102128l

Thaís Luiz Marcial, F. Nakagomi, Reny Renzetti Angela, Guilherme Siqueira Oliveira

{"title":"Nb2O5 nanoparticles obtained by microwave assisted combustion synthesis under different conditions","authors":"Thaís Luiz Marcial, F. Nakagomi, Reny Renzetti Angela, Guilherme Siqueira Oliveira","doi":"10.2298/pac2102128l","DOIUrl":"https://doi.org/10.2298/pac2102128l","url":null,"abstract":"The microwave assisted combustion synthesis (MACS) as a new, quick and low cost synthesis method was used for preparation of niobium pentoxide (Nb2O5) powders. The present paper investigated the effect of reactant concentrations (ammonium niobium oxalate, urea and ammonium nitrate) on the characteristics of Nb2O5 nanoparticles. Three samples were synthesized with stoichiometric ratio between the fuel and oxidant (C1), excess of oxidant (C2) and excess of fuel (C3). In all samples, Nb2O5 crystalline nanoparticles with irregular morphology were detected. The synthesis of nanoparticles with smaller diameter in the C2 and C3 samples was confirmed by greater values of band gap energy measured through UV-Visible diffuse reflectance spectroscopy (indicating quantum confinement) and by the Rietveld refinement of X-ray diffraction patterns. The results showed that the amounts of oxidant and fuel can change synthesis temperature, influencing the final characteristics of the particles, such as size and existent phases. In these cases the excess of oxidant and fuel in the C2 and C3 samples, respectively, decreases the average synthesis temperature and decelerates the particle growth and the formation of the monoclinic phase.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68578765","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

Mechanical properties of phase-pure bulk Ta4AlC3 prepared by spark plasma sintering and subsequent heat treatment 火花等离子烧结及热处理制备的相纯体Ta4AlC3的力学性能

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/pac2103211y

G. Ying, Cong Hu, Lu Liu, Cheng Sun, Dong Wen, Jianfeng Zhang, Yongting Zheng, Minghui Wang, Chen Zhang, Xiang Wang, Cheng Wang

{"title":"Mechanical properties of phase-pure bulk Ta4AlC3 prepared by spark plasma sintering and subsequent heat treatment","authors":"G. Ying, Cong Hu, Lu Liu, Cheng Sun, Dong Wen, Jianfeng Zhang, Yongting Zheng, Minghui Wang, Chen Zhang, Xiang Wang, Cheng Wang","doi":"10.2298/pac2103211y","DOIUrl":"https://doi.org/10.2298/pac2103211y","url":null,"abstract":"High-purity and bulk Ta4AlC3 ceramics were successfully fabricated by spark plasma sintering (SPS) and subsequent heat treatment, using the raw materials including TaC and Ta2AlC powders. These raw materials were first synthesized by self-propagation high temperature synthesis from elements tantalum, aluminium and carbon black powders, followed by pressure-less sintering. The as-fabricated bulk Ta4AlC3 was relatively stable when subjected to heat treatment at elevated temperature of 1500?C. Moreover, prolonging the heat treatment time resulted in bigger grain sizes and higher densities of the Ta4AlC3. The flexural strength and the fracture toughness of the Ta4AlC3 fabricated by SPS were found to be 411MPa and 7.11MPa?m1/2, respectively. After the heat treatment at 1500?C for 8 h, the flexural strength and the fracture toughness of the Ta4AlC3 could reach 709MPa and 9.23MPa?m1/2, respectively. The special structural characteristics of the ternary ceramics and the increase of density after the heat treatment are the main reasons for the variation in mechanical properties of ternary ceramics.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68579058","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: 5

Effect of particle size of Y2O3-Al2O3 additives on microstructure and mechanical properties of Si3N4 ceramic balls for bearing applications Y2O3-Al2O3添加剂粒径对轴承用Si3N4陶瓷球组织和力学性能的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/pac2103297z

Jing Zhang, Wenxue Wang, F. Sun, Weiru Zhang, Boheng Li, Ming-shuai Zhang

引用次数: 1

Microstructure evolution, grain growth kinetics and mechanical properties of Ca2MgSi2O7 bioceramics sintered at various temperatures 不同温度下烧结Ca2MgSi2O7生物陶瓷的显微组织演变、晶粒生长动力学和力学性能

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/pac2104357m

H. Mohammadi, Y. B. Baba Ismail, K. Shariff, A. M. Mohd Noor

引用次数: 0

Effects of sintering temperature on structure and electrical properties of (Na0.48k0.473Li0.04Sr0.007)(Nb0.883Ta0.05Sb0.06Ti0.007)O3 piezoelectric ceramics 烧结温度对(Na0.48k0.473Li0.04Sr0.007)(Nb0.883Ta0.05Sb0.06Ti0.007)O3压电陶瓷结构和电性能的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/PAC2101079H

Cheng‐Shong Hong, Yingfang Hong

引用次数: 1

Colossal magnetoresistance of Nd-doped LaCaMnO3 polycrystalline ceramics nd掺杂LaCaMnO3多晶陶瓷的巨磁阻

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/PAC2101095R

Sam Rajan, K. V. A. Kumar, Jayakumari Isac

引用次数: 1

Low velocity drop weight impact behaviour of Al2O3-Ni-ZrO2 and Al2O3-Ni-Cr2O3 ceramic composites Al2O3-Ni-ZrO2和Al2O3-Ni-Cr2O3陶瓷复合材料的低速降重冲击性能

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/pac2102154k

Yildiz Betül Kafkaslioğlu, Murat Buyuk, Y. Tür

{"title":"Low velocity drop weight impact behaviour of Al2O3-Ni-ZrO2 and Al2O3-Ni-Cr2O3 ceramic composites","authors":"Yildiz Betül Kafkaslioğlu, Murat Buyuk, Y. Tür","doi":"10.2298/pac2102154k","DOIUrl":"https://doi.org/10.2298/pac2102154k","url":null,"abstract":"Particulate Al2O3 matrix nanocomposites containing 1 vol.%Ni were prepared by the heterogeneous precipitation method and the addition of 5 vol.% ZrO2 (ANZ) or 1 vol.% Cr2O3 (ANC). The prepared samples were subjected to the low energy drop weight impact tests to compare the behaviour of the composites under low energy impact and to investigate the damage mechanisms. The pure Al2O3, Al2O3/Ni, Al2O3/ZrO2 and Al2O3/Cr2O3 compositions with the same additive ratios were also produced to make the comparison systematically. Also, the Vickers hardness measurements were carried out and a significant increase in hardness was attained for both ANZ and ANC composites. The average hardness value around 24.8?1.0GPa was measured for the ANZ and ANC composites which means ~15% improvement compared to the pure Al2O3. Between all the compositions, the maximum force (Fmax) value was obtained for the ANZ (for 12 J impact energy level Fmax = 26617N) according to the low energy drop weight impact test results. Tensile radial crack network formation, cone formation, fracture and crushing of the cone structure were observed as damage mechanisms for all compositions. The volume of conical frustum structure was evaluated for each composition and the effect of microstructure on possible ballistic performance was also discussed.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68578869","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

Enhanced low electric-field energy-storage performance in Ba0.9Sr0.1TiO3-Bi(Mg1/2Ti1/2)O3 ceramics 增强Ba0.9Sr0.1TiO3-Bi(Mg1/2Ti1/2)O3陶瓷的低电场储能性能

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/pac2104410w

Shihao Wang, B. Fang, Shuai Zhang, Xiaolong Lu, Jianning Ding

{"title":"Enhanced low electric-field energy-storage performance in Ba0.9Sr0.1TiO3-Bi(Mg1/2Ti1/2)O3 ceramics","authors":"Shihao Wang, B. Fang, Shuai Zhang, Xiaolong Lu, Jianning Ding","doi":"10.2298/pac2104410w","DOIUrl":"https://doi.org/10.2298/pac2104410w","url":null,"abstract":"Perovskite (1-x)Ba0.9Sr0.1TiO3-xBi(Mg1/2Ti1/2)O3 (BST-BiMT-x) ceramics were prepared by sintering the corresponding powders synthesized by combining of solid state reaction method with citrate sol-gel and selfcombustion techniques. Submicron grains morphology, high density and large resistivity were obtained in the BST-BiMT-x ceramics. In addition, the BST-BiMT-0.1 and BST-BiMT-0.075 ceramics exhibit ferroelectric hysteresis loops with slim shape which lead to enhanced energy-storage properties. The energy-storage density of these two ceramics increases almost linearly with increasing the applied electric filed. The energy-storage density and efficiency at 25 kV/cm of the BST-BiMT-0.1 and BST-BiMT-0.075 ceramics sintered at 1200?C are 141.2mJ/cm3 and 79.3%, and 158.1mJ/cm3 and 76.7%, respectively, surpassing many recently reported values for ferroelectric/antiferroelectric ceramics. The enhanced energy-storage density and efficiency under low electric field can be attributed to the slim polarization-electric field hysteresis loops, high density accompanied by submicron grains morphology and pure perovskite structure.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68579862","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

Effects of oxidation of SiC aggregates on the sintering behaviour and microstructures of SiC-CaAl12O19 composite refractories SiC集料氧化对SiC- caal12o19复合耐火材料烧结性能和显微组织的影响

IF 1.1 4区材料科学

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI: 10.2298/PAC2101011S

Si Yaochen, X. Miao, Hongxia Li, Sun Honggang, A. Guo, Du Yihao, Zhao Shixian, Shang Xinlian, Yongqiang Chen

{"title":"Effects of oxidation of SiC aggregates on the sintering behaviour and microstructures of SiC-CaAl12O19 composite refractories","authors":"Si Yaochen, X. Miao, Hongxia Li, Sun Honggang, A. Guo, Du Yihao, Zhao Shixian, Shang Xinlian, Yongqiang Chen","doi":"10.2298/PAC2101011S","DOIUrl":"https://doi.org/10.2298/PAC2101011S","url":null,"abstract":"In order to develop chrome-free refractory materials applicable in coal slurry gasification, SiC-CaAl12O19 (SiC-CA6) composite refractories were developed and prepared by using SiC aggregates and CA6 powders as main raw materials. The sintering behaviour of the composites was investigated. After firing at different temperatures under CO atmosphere, the effects of oxidation of SiC aggregates on the sintering behaviour and microstructures of SiC-CA6 composite refractorieswere investigated. SiC-CA6 composites could not be sintered when firing temperature was lower than 1500?C. SiC had a passive oxidation and the oxidation components were able to react with CA6 to form CaAl2Si2O8. The CaAl2Si2O8 melted into liquid when sintering temperature was in the range of 1500-1600?C, which promoted the sintering process of the SiC-CA6 composites. At temperatures above 1600 ?C, an active oxidation of SiC occurred. Simultaneously, SiC could also reacted with the SiO2(s,l) to form SiO, leading to the precipitation of Al2O3 and CaO in the liquid to generate plate-like CA6. Above this temperature, the sintering of the SiC-CA6 composite refractories was affected by the growth of CA6 and oxidation of SiC. This work demonstrates that the optimal sintering temperature for the SiC-CA6 composite refractories was 1600?C.","PeriodicalId":20596,"journal":{"name":"Processing and Application of Ceramics","volume":"15 1","pages":"11-18"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68578173","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: 5