Calcined MnO2–ZrO2–SiO2 sintering aid for a non-reducible (Ca0.7Sr0.3O)1.03(Ti0.1Zr0.9)O2 dielectric material

Ceramics International41(2015)3910–3917

Chan-Sik Park, HyunhoShin, HyunSukJung,

 

Abstract

 

The performance of calcined MnO2–ZrO2–SiO2 (MZS) compositions as sintering aids for a non-reducible(Ca0.7Sr0.3O)1.03(Ti0.1Zr0.9)O2(CSTZ) dielectric material has been investigated at the sintering temperature of 1230–1250C in a reducingatmosphere. The sintered body yielded the (Ca0.7Sr0.3O)1.03(Ti0.1Zr0.9)O2 dielectric phase with traces of calcium zirconates. When 2.5wt% of MZS(0.55MnO2–0.05ZrO2-0.40 SiO2) was added and sintered at 1250C, the specimen demonstrated an apparent densityo f4.95g/cm3, a dielectric constant of 32.4,a dielectric loss of 0.0003, an insulation resistance of 2X10^11 Ω, and temperature coefficients of capacitance of -12 ppm at -55C and -9 ppm at 125C (with respect to the 25C standard). These dielectric properties satisfy the C0G characteristics, and thus the CSTZ dielectric material with the MZS sintering aid can be used for multilayer capacitors with high temperature reliability.