| Synthesis of Ag（Nb0.8Ta0.2）O3 Ceramics Under Different Ambient Conditions |
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| 引用本文： | 郭秀盈,肖谧,吴霞宛,张之圣.Synthesis of Ag（Nb0.8Ta0.2）O3 Ceramics Under Different Ambient Conditions[J].天津大学学报(英文版),2006,12(1):23-27. |
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| 作者姓名： | 郭秀盈 肖谧 吴霞宛 张之圣 |
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| 作者单位： | School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China |
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| 基金项目： | Supported by National Natural Science Foundation of China（ No. 50402011 ）. |
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| 摘 要： | Different ambient conditions for the synthesis of Ag（Nb0.8Ta0.2）O3 ceramics were investi- gated. The Ag（Nb0.8Ta0.2）O3 powder was synthesized at 950 ℃ under different ambient conditions, and then pressed into disks and sintered between 1060 ℃ and 1100 ℃ respectively. Samples were investigated by X-ray diffraction, scanning electron microscopy and dielectric measurement. The results show that perovskite Ag（Nb0.8Ta0.2）O3 powder was easier to be synthesized in air than in vacuum at 950℃. Grain size of ceramic samples sintered in air was uniform （about 1 μm） and its dielectric loss was small for its high density. However, the samples decomposed greatly and ceramics could hardly be densified when sintered in vacuum, Thus,. higher atmospheric pressure and oxygen atmosphere would benifit the synthesis of Ag （Nb0.8Ta0.2）O3, and suppress its decomposition at high temperature.
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| 关 键 词： | 氧化物陶瓷 Ag（Nb0.8Ta0.2）O3 钙钛矿 烧结环境 热分解 |
| 收稿时间： | 2005-05-25 |
Synthesis of Ag ( Nb0.8 Ta0.2 ) O3 Ceramics Under Different Ambient Conditions |
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| GUO Xiuying,XIAO Mi,WU Xiawan,ZHANG Zhisheng.Synthesis of Ag ( Nb0.8 Ta0.2 ) O3 Ceramics Under Different Ambient Conditions[J].Transactions of Tianjin University,2006,12(1):23-27. |
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| Authors: | GUO Xiuying XIAO Mi WU Xiawan ZHANG Zhisheng |
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| Abstract: | Different ambient conditions for the synthesis of Ag(Nb0.8Ta0.2)O3 ceramics were investigated. The Ag( Nb0.8Ta0.2)O3 powder was synthesized at 950 ℃ under different ambient conditions,and then pressed into disks and sintered between 1 060 ℃ and 1 100 ℃ respectively. Samples were investigated by X-ray diffraction, scanning electron microscopy and dielectric measurement. The resuits show that perovskite Ag( Nb0.8Ta0.2) O3 powder was easier to be synthesized in air than in vacuum at 950 ℃. Grain size of ceramic samples sintered in air was uniform (about 1 μm) and its dielectric loss was small for its high density. However, the samples decomposed greatly and ceramics could hardly be densified when sintered in vacuum. Thus, higher atmospheric pressure and oxygen atmosphere would benifit the synthesis of Ag (Nb0.8Ta0.2)O3, and suppress its decomposition at high temperature. |
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| Keywords: | Ag ( Nb0 8 Ta0 2 ) O3 perovskite decomposition |
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