【摘 要】
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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 diff
【机 构】
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School of Electronic Information Engineering
论文部分内容阅读
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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