摘要
以具有中介电常数的新型Y2O3-2TiO2系微波介质陶瓷为基体,选用Sm2O3作为掺杂改性剂,通过传统固相法制备成陶瓷。重点研究了不同Sm2O3掺杂量对基体Y2O3-2TiO2微波介质陶瓷物相组成和介电性能的影响。采用X射线衍射和扫描电子显微镜分别对其物相组成和显微结构进行了分析,用阻抗分析仪和网络分析仪测试其介电性能。结果表明:掺杂Sm2O3未改变材料的主晶相,仍为A2B2O7烧绿石结构,Sm3+取代Y3+占据A位;掺杂有效降低了陶瓷的烧结温度,掺杂量为5%(质量分数)时,烧结温度为1330℃,材料的综合性能最佳,εr=23,tanδ=0.0046,Q×f=6713 GHz。
The Y2O3-2TiO2 based microwave dielectric ceramics doped with samarium oxide were prepared by the conventional solid-state method. The effects of.their dielectric properties and phase composition with additive of different contents of samarium oxide were studied. The X-ray diffraction radiation and scanning electron microscopy were used to examine the phase-composition and microstructure of the ceramics, respectively. The dielectric property at microwave frequency was measured by a network analyzer and an impedance analyzer. The results showed that the main phase still exhibited a pyrochlore structure. The Sm^3＋ was incorporated into Y^3 ＋ site on the A site of pyrochlore structure. The sintering temperature decreased effectively by doping samarium oxide. When the doping content of Sm2O3 was 5%, and the ceramics was sintered at 1330 Celsius degree, then the combination property was the best： εr = 23, tan δ = 0. 0046, Q ×f = 6713 GHz.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2010年第1期66-70,共5页
Journal of the Chinese Society of Rare Earths
基金
江苏省高校自然科学重点项目(08KJA430002)资助
关键词
微波介质陶瓷
SM2O3
烧绿石结构
掺杂
稀土
microwave dielectric ceramics
samarium oxide
pyrochlore structure
doping
rare earths
