Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (8): 812-818.doi: 10.15541/jim20150632

• Orginal Article • Previous Articles     Next Articles

Effects of MgO, SrO and La2O3 Co-doping on Structure and Properties of (Zr0.8Sn0.2)TiO4 Ceramics

Qing-Lei SUN1, Hong-Qing ZHOU1(), QIAN-Lei1, Ya-Zhou WANG1, Hai-Kui ZHU1, Zhen-Xing YUE2   

  1. 1. School of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
    2. State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
  • Received:2015-12-15 Revised:2016-02-14 Online:2016-08-20 Published:2016-07-20
  • About author:SUN Qing-Lei. E-mail: lijia20162017@163.com

Abstract:

(Zr0.8Sn0.2)TiO4 (ZST) ceramics were fabricated via conventional solid-state reaction method which was promoted by liquid phase. The effects of MgO, SrO and La2O3 co-doping ZST ceramics on phase composition, microstructures, sintering behavior, and high frequency dielectric properties were investigated systematically. The results showed that the main crystalline phase of the ceramics was ZST. The appropriate amount of MgO, SrO and La2O3 additions effectively decreased the sintering temperature of ZST ceramics and improved the microwave dielectric properties. The increment of MgO addition influenced comprehensive properties of ZST ceramics slightly. The decrement in bulk densities, dielectric constants and Q×f values with excessive SrO addition was due to incomplete growth of grains, incompact structures and increasing porosities. Additionally, the additives did not affect obviously the temperature coefficient of resonant frequency (τf) of the ceramics. When added 0.2wt% MgO, 0.6wt% SrO and 1.0wt% La2O3 and sintered at 1300℃ for 5 h, ZST ceramics displayed the optimum comprehensive properties: ρ = 5.14 g/cm3, εr = 40.11, Q×f = 51000 GHz (f = 5.61 GHz), τf = -2.85×10-6-1.

Key words: (Zr0.8Sn0.2)TiO4, MgO, SrO co-doping, microstructures, sintering behavior, dielectric properties

CLC Number: 

  • TB34