TY - JOUR
T1 - Synthesis Ba0.6Sr0.4TiO3-ZnNb 2O6 composite ceramics using chemical coating method
AU - Wang, Tong
AU - Gao, Feng
AU - Hu, Guoxin
AU - Tian, Changsheng
PY - 2010/8/20
Y1 - 2010/8/20
N2 - A coating approach for preparing 0.8Ba0.6Sr 0.4TiO3-0.2ZnNb2O6 (hereafter BSTZ) composite ceramics was investigated. The Al2O3-coated Ba0.6Sr0.4TiO3 particles were prepared successfully by chemical coating method and used as raw materials to fabricate BSTZ composite ceramics. After BSTZ ceramic sintered at 1280 °C, the BaNb3.6O10 phase was suppressed, which should attributed to the separation of Ba0.6Sr0.4TiO3 and ZnNb2O6 by the Al2O3 coating. The sintered BSTZ ceramics exhibited excellent dielectric temperature stability, with a moderate dielectric constant (εr = 640.8) and a low dielectric loss (tan δ = 0.0078) at 10 kHz. The dielectric constant change with temperature for BSTZ ceramics was less than ±5% over the temperature range of -55 °C to 125 °C, meeting the requirement of the X7R type capacitor specification. The tunability of the sample is 7.2% under a dc electric field of 3 kV/mm, which made it a promising candidate material used for the tunable ceramic capacitors and the phase shifters. Crown
AB - A coating approach for preparing 0.8Ba0.6Sr 0.4TiO3-0.2ZnNb2O6 (hereafter BSTZ) composite ceramics was investigated. The Al2O3-coated Ba0.6Sr0.4TiO3 particles were prepared successfully by chemical coating method and used as raw materials to fabricate BSTZ composite ceramics. After BSTZ ceramic sintered at 1280 °C, the BaNb3.6O10 phase was suppressed, which should attributed to the separation of Ba0.6Sr0.4TiO3 and ZnNb2O6 by the Al2O3 coating. The sintered BSTZ ceramics exhibited excellent dielectric temperature stability, with a moderate dielectric constant (εr = 640.8) and a low dielectric loss (tan δ = 0.0078) at 10 kHz. The dielectric constant change with temperature for BSTZ ceramics was less than ±5% over the temperature range of -55 °C to 125 °C, meeting the requirement of the X7R type capacitor specification. The tunability of the sample is 7.2% under a dc electric field of 3 kV/mm, which made it a promising candidate material used for the tunable ceramic capacitors and the phase shifters. Crown
KW - Barium strontium titanate
KW - Chemical coating method
KW - Composite ceramics
KW - Zinc niobium oxide
UR - http://www.scopus.com/inward/record.url?scp=77955422508&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2010.05.116
DO - 10.1016/j.jallcom.2010.05.116
M3 - 文章
AN - SCOPUS:77955422508
SN - 0925-8388
VL - 504
SP - 362
EP - 366
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 2
ER -