摘要
采用丝网印刷工艺并通过有效掺杂B2O3-Li2O制备出了一致性和可重复性良好的Ba0.6Sr0.4TiO3(BST)厚膜。系统研究了B2O3-Li2O掺杂对BST厚膜的低温烧结特性、微观结构、相构成及介电性能的影响。结果表明:随着B2O3-Li2CO3含量的增加,BST厚膜的烧结温度逐渐降低,晶粒尺寸和介电常数显著变小。当B2O3-Li2CO3的掺杂量为4.5%时,BST厚膜可在900℃下低温烧结成瓷,所得样品在20℃和10 kHz频率下的介电常数及介电损耗分别为312和0.003 96,在3×103 V/mm偏场下的可调率达16.2%。
B2O3-Li2O doped Ba0.6Sr0.4TiO3 （BST） thick films with good consistency and repeatability were fabricated by a screen printing technique. The effects of B2O3-Li2O doping on the sintering behavior, microstructure, phase composition and dielectric properties of the BST thick films were investigated systematically. The results indicate that the sintering temperature of BST thick films decreases gradually with increasing B2O3-Li2CO3 content, while their grain size and relative permittivity decrease significantly. When 4.5% （mass fraction） B2O3-Li2CO3 is doped, the sintering temperature of BST thick film reduces to 900 ℃; And, the relative permittivity and dielectric loss of the obtained thick film at 20 ℃ and 10 kHz are 312 and 0.003 96, respectively, while its dielectric tenability at 3×10^3V/mm reaches 16.2%.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2011年第9期17-20,共4页
Electronic Components And Materials
基金
广东省教育部产学研结合项目资助(No.2010B090400447)
华中科技大学研究生科技创新基金资助项目(No.HF-07-04-2010-185)
关键词
BST厚膜
丝网印刷
介电性能
可调率
BST thick films
screen printing
dielectric properties
tunability
