研究了B_2O_3助烧剂对(Zn_0.5Mg_0.5)Nb_2O_6陶瓷的烧结温度、微观结构、相结构及微波介电性能的影响.结果表明,助烧剂B_2O_3的添加有助于降低(Zn_0.5Mg_0.5)Nb_2O_6陶瓷的烧结温度,可以将(Zn_0.5Mg_0.5)Nb_2O_6陶瓷的烧结温度降低到950 ℃.其中掺杂2%B_2O_3(质量分数,下同)的(Zn_0.5Mg_0.5)Nb_2O_6陶瓷,在950 ℃烧结可获得结构致密的烧结体,并且具有较佳的介电性能:ε_r = 20.7,Q×f= 60156 GHz.
The effect of B_2O_3 additions on the sintering temperature, phase composition, microstructure and microwave dielectric properties of (Zn_0.5Mg_0.5)Nb_2O_6 ceramics was investigated. The results indicated that the B_2O_3 additive was effective for low-temperature sintering of (Zn_0.5Mg_0.5)Nb_2O_6 ceramics, and could lower the sintering temperature to 950 ℃. Compact (Zn_0.5Mg_0.5)Nb_2O_6 ceramics could be prepared at 950 ℃ by doping with 2 % B_2O_3, which exhibited excellent microwave dielectric properties of ε_r = 20.7, Q×f = 60156 GHz.
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