Microwave dielectric properties of BaO–Ta2O5–TiO2 system
Microwave dielectric properties of BaO–Ta2O5–TiO2 system
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DOI：
10.1016/j.jeurceramsoc.2005.09.061
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发表时间：
2006
影响因子：
5.7
通讯作者：
Atsushi Yokoi;H. Ogawa;A. Kan
中科院分区：
文献类型：
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作者：
Atsushi Yokoi;H. Ogawa;A. Kan
采用固相反应法研究了BaO-Ta 2 O 5-TiO 2体系的微波介电性能。发现Ba10Ta7.04（Ti1.2−xSnx）O30固溶体比Ba 8（Ta 4 −xNbx）Ti 3 O24固溶体具有更高的Q·f值。Ba10Ta7.04（Ti1.2−xSnx）O30固溶体的极限约为x=0.75;固溶体的晶格参数c与B（1）O 6八面体的变化有关，在0 ~ 0.75的组成范围内显著增加。Sn取代Ti后，Ba 10 Ta 7.04（Ti 1.2 −xSnx）O 30固溶体的Q·f值显著提高，在x=0.75时Q·f值最高，达到59，100 GHz。此外，在x=0.75时，Ba 10 Ta 7.04（Ti 1.2 −xSnx）O 30固溶体的兰德τ f值分别为25.6和30.3ppm/°C。
Microwave dielectric properties of the BaO–Ta2O5–TiO2system were investigated by the solid-state reaction method. It was recognized that the Ba10Ta7.04(Ti1.2−xSnx)O30solid solutions have the higher Q·f value in comparison with the Ba8(Ta4−xNbx)Ti3O24solid solutions. The limit of the Ba10Ta7.04(Ti1.2−xSnx)O30solid solutions was approximately x=0.75; the lattice parameter c of the solid solutions, which is related to the change in the B(1)O6octahedron, was significantly increased in the composition range from 0 to 0.75. The Q·f values of the Ba10Ta7.04(Ti1.2−xSnx)O30solid solutions are remarkably improved by the Sn substitution for Ti; the highest Q·f value of 59,100GHz is obtained at x=0.75. Moreover, the ɛrand τfvalues of the Ba10Ta7.04(Ti1.2−xSnx)O30solid solutions at x=0.75 were 25.6 and 30.3ppm/°C, respectively.