Low-Fire Processing of BaTiO3 with BaCuO2–CuO
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概要
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The effects of a liquid-phase-sintering aid, BaCuO2–CuO (BCC), on the densification and dielectric properties of BaTiO3 ceramics have been investigated. The densification temperature of BaTiO3 is greatly reduced from 1300–1350°C down to 1050°C in the presence of BCC. This is attributed to a chemical reaction taking place at the interface of BCC/BaTiO3 during firing. The BaTiO3 dissolves into BCC, forming crystalline phases of BaCuO2, CuO, Cu2O and Ba6Ti17O40, and this enhances the densification kinetics of BaTiO3. For the samples with 2.0–2.5 wt% BCC, a high relative sintered density of ${>}95$% is obtained at 1050°C, and the resulting dielectric ceramics have a dielectric constant and dielectric loss in the range of 2200–2400 and ${<}3$% at 1 MHz, respectively.
- 2004-05-15
著者
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Lei Cheng-dao
Department Of Materials Science And Engineering National Tsing Hua University
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Jean Jau-ho
Department Of Materials Science And Engineering National Tsing Hua University
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Lei Cheng-Dao
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, ROC
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