以BaCO3和TiO2粉末为原料,采用传统固相反应法制备Ba2Ti9O20陶瓷.以BiCl3、Zn(NO3)2 、H3BO3溶液为前驱液,通过液相法引入Bi2O3-ZnO-B2O3(BZB)助烧剂以降低Ba2Ti9O20陶瓷的烧结温度代替直接混合Ba2Ti9O20和BZB粉末.结果表明,液相法引入0.3 mol/L BZB溶液,1150 ℃烧结3 h所得Ba2Ti9O20陶瓷介电性能最佳(εr=37,Qf=23485 GHz),优越于固相混合法所得最佳介电性能(εr=34, Qf=16985 GHz).
Ba2Ti9O20 ceramics were synthesized by the traditional solid-state reaction method, using BaCO3 and TiO2 as raw materials.In order to reduce the sintering temperature of Ba2Ti9O20 ceramics, liquid-phase method was used to dope Bi2O3-ZnO-B2O3(BZB) by precursor solution (BiCl3,Zn(NO3)2 and H3BO3) instead of mixing BZB powder directly with Ba2Ti9O20 ceramics.The optimal concentration of BZB was found to be 0.3 mol/L, and the derived Ba2Ti9O20 ceramic sintered at 1150 ℃ for 3 h presented good microwave dielectric properties of εr=37 and Qf=23485 GHz, which is much better than those of mixing BZB powder directly with Ba2Ti9O20 ceramics(εr=34 and Qf=16985 GHz).
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