YF_3掺杂对Ba_(0.6)Sr_(0.4)TiO_3介电可调性的影响  

Influence of Doped YF_3 on the Dielectric Properties of Barium Strontium Titanate Ceramics

作　　者：刘珊珊[1] 赵玉珍[1] 王希林[1] 周和平[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2009年第A02期298-300,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50572050)

摘　　要：采用传统工艺制备了YF3掺杂的Ba0.6Sr0.4TiO3陶瓷材料,研究了YF3掺杂比例对钛酸锶钡材料结构及介电性能的影响。结果表明:烧结后得到的BSTO材料具有典型的钙钛矿结构;YF3掺杂具有降低Ba0.6Sr0.4TiO3材料的介电常数、细化陶瓷晶粒和提高介电常数温度稳定性的作用。在氟化钇掺杂比例1%时介电常数降至1887(100kHz),介电可调性达到30%(1.5kV/mm)以上,各掺杂比例的钛酸锶钡材料的介电损耗均在1%以下。Barium strontium titanate ceramics （Ba06Sr0.4TiO3, BST） ceramics with doped YF3 were prepared using the traditional ceramic process. The phase structure, microstructure and dielectric properties of BST ceramics were studied. The XRD patterns show the BSTO ceramics with doped YF3 belongs to perovskite phase. The results showed that YF3 additive can decrease the dielectric constant, decrease the crystallite size for BST ceramic and reduce the dielectric constant temperature changing rate. The dielectric constant of 1wt% YF3 doped BST was 1187（100 kHz）, while the tunability remains more than 30% （1.5 kV/mm）. Dielectric losses of all the samples were below 1%.

关 键 词：钛酸锶钡 氟化钇 介电可调性 

分 类 号：TQ174.1[化学工程—陶瓷工业]