Low-Fire Processing of Voltage-Tunable Ba0.6Sr0.4TiO3 Dielectric
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概要
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By adding a low-softening-point Li2O–B2O3–SiO2–CaO–Al2O3 (LBSCA) glass, the voltage-tunable Ba0.6Sr0.4TiO3 (BST64) ceramics can be densified at 900 °C, which is 400–500 °C lower than the temperature for producing the pure BST64. This is caused by liquid-phase sintering and an interfacial reaction taking place at the interface of LBSCA/Ba0.6Sr0.4TiO3. For the samples with 10–35 vol % LBSCA glass, a high relative sintered density of ${>}95$% is obtained at 900 °C and the resulting dielectric composites have a dielectric constant and loss at 1 MHz in the ranges of 1040–145 and 0.4–1.0%, respectively. The voltage tunability of the resulting LBSCA+BST64 dielectric at 1 MHz and 1 kV/mm is in the range of 0.8–8%, which exhibits a decreasing trend with increasing LBSCA content.
- 2007-06-15
著者
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Jean Jau-ho
Department Of Materials Science And Engineering National Tsing Hua University
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Lu Yu
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.
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Lu Yu
Department of Electronic Engineering, Cheng Shiu University, Niaosong, Kaohsiung 833, Taiwan, R.O.C.
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