(Zn_(0.9)Mg_(0.1))TiO_3微波介质陶瓷低温烧结研究
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摘要
采用传统固相法对使用Mg取代一部分Zn形成的六方钛铁矿型无限固溶体(Zn0.9Mg0.1)TiO3陶瓷进行了低温烧结研究。低熔点玻璃ZnO-B2O3-SiO2(ZBS)的加入提高了烧结致密度,使烧结温度降低到900℃以下,制得了不含Zn2TiO4的单一六方(Zn0.9Mg0.1)TiO3相陶瓷,其微波介电性能优异。加入质量分数为0.5%的ZBS玻璃时,在900℃成瓷良好,介电常数εr=20.53,品质因数与频率的乘积Q×f=61 630GHz(f=7.4GHz)。
The low temperature sintering of(Zn0.9Mg0.1)TiO3 was studied by conventional solid-state reaction methods,adopting Mg substitute a part of Zn to form an ilmenite type infinite solid solution(Zn0.9Mg0.1)TiO3.The low melting point glass ZnO-B2O3-SiO2(ZBS)significantly increased the density of(Zn0.9Mg0.1)TiO3ceramics,and the sintering temperature was lowered to 900 ℃.Single(Zn0.9Mg0.1)TiO3phase ceramics was obtained,which had excellent microwave dielectric properties.By adding 0.5% ZBS glass,the ceramics could be well sintered at 900℃,the microwave dielectric properties were described as follows:εr=20.53,Q×f=61 630GHz(f=7.4GHz).
The low temperature sintering of(Zn0.9Mg0.1)TiO3 was studied by conventional solid-state reaction methods,adopting Mg substitute a part of Zn to form an ilmenite type infinite solid solution(Zn0.9Mg0.1)TiO3.The low melting point glass ZnO-B2O3-SiO2(ZBS)significantly increased the density of(Zn0.9Mg0.1)TiO3ceramics,and the sintering temperature was lowered to 900 ℃.Single(Zn0.9Mg0.1)TiO3phase ceramics was obtained,which had excellent microwave dielectric properties.By adding 0.5% ZBS glass,the ceramics could be well sintered at 900℃,the microwave dielectric properties were described as follows:εr=20.53,Q×f=61 630GHz(f=7.4GHz).
引文
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[7]YANG J,SWISHER J H.The phase stability of Zn2Ti3O8[J].Materials Characterization,1996,37(2/3):153-159.
[8]KIM H T,NAHM S,BYUN J D.Low-fired(Zn,Mg)TiO3 microwave dielectrics[J].J Am Ceram Soc,1999,82(12):3476-3480.
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