在BZN系陶瓷中，立方焦绿石结构的α相与低对称结构的β相是二个重要的基本物相，α相是熔点为1190℃的同成分熔融化合物，对应负温度系数，β相是转熔温度为1100℃的异成分熔融化合物，对应正温度系数，α相与β相按一定比例组成(α+β)复相瓷料，得到CH组零温度系数.分别在α相、β相以及CH组复相瓷料中进行银掺杂，通过瓷料介电性能的研究，首次明确了银掺杂对α相、β相以及CH组复相瓷料介电性能的不同影响和影响程度，进一步研究银掺杂β相瓷料的熔融物性，结果表明银掺杂对瓷料熔融物性的影响是影响其介电性能的内因.
Cubic pyrochlore structureβphase and low symmetry structure phase are the basic phases of BZN-based ceramics.The βphase is a congruent compound,its congruent melting point is 1190℃,corresponding to negative temperature coefficient of dielectric constant.The phase is an incongruent compound,its incongruent melting point (peritectic temperature) is 1100℃,corresponding to positive temperature coefficient.The zero temperature coefficient of CH grade would be met with fixed α/β phase ratio.In this paper,dielectric properties of Ag-doped BZN-based αphase,β phase and CH grade diphasic ceramics were explored respectively.The results show the effects of Ag-dopant on the dielectric properties of BZN-based αphase,βphase and CH grade diphasic ceramics.The melting behaviors of Ag-doped BZN-based βphase were explored too.The change of incongruent melting point results in the change of the dielectric property of Ag-doped BZN-based ceramics.
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