(Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3介质陶瓷的微波烧结研究

人工晶体学报, 2017, 46(3): 526-535.

(Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3介质陶瓷的微波烧结研究

赵莉 ^1, , 胡玉叶 ^2, , 李丹 ^3, , 刘秋燕 ^4, , 沈春英 ^5,

1.安徽新华学院土木与环境工程学院,合肥,230088

2.安徽新华学院土木与环境工程学院,合肥,230088

3.安徽新华学院土木与环境工程学院,合肥,230088

4.安徽新华学院土木与环境工程学院,合肥,230088

5.南京工业大学材料科学与工程学院,南京,210009

基金项目: 安徽新华学院校级自然基金重点项目(2015zr006,2015zr012) 安徽省高校自然基金重点项目(KJ2016A316)

关键词： (Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3 , 微波烧结 , 介质陶瓷 , 介电性能

Microwave Sintering of (Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3 Dielectric Ceramics

Keywords： (Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3 , microwave sintering , dielectric ceramics , dielectric property

微波烧结法制备0.85(Mg0.7Zn0.3)TiO3-0.15(Ca0.61La0.26)TiO3 ((Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3)系介质陶瓷,研究微波烧结工艺对(Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3陶瓷烧结性能、微观结构、相组成和微波介电性能的影响.结果表明:(Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3陶瓷的主晶相为(Mg0.7Zn0.3)TiO3、Ca0.61La0.26TiO3,第二相为(Mg0.7Zn0.3)Ti2O5;升温速率15 ℃/min,烧结温度1275 ℃,保温时间20 min时,陶瓷微波介电性能优良:εr=27.01,Q·f=103500 GHz,τf=+2 ppm/℃.

0.85(Mg0.7Zn0.3)TiO3-0.15(Ca0.61La0.26)TiO3 ((Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3) system ceramics were prepared by microwave sintering.The effects of microwave sintering process on the sintering behaviour, microstructure, phase composition and microwave dielectric properties of ceramics were investigated.The results show that (Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3 ceramics exhibited mixed phases of (Mg0.7Zn0.3)TiO3 and Ca0.61La0.26TiO3 as the main phase associated with minor phases of (Mg0.7Zn0.3)Ti2O5.When heating rate is 15 ℃/min, the (Mg0.7Zn0.3)TiO3-Ca0.61La0.26TiO3 ceramics exhibit excellent microwave dielectric properties:εr=27.01,Q·f=103500 GHz,τf=+2 ppm/℃ sintered at 1275 ℃ for 20 min.

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