(Mg_xZn_(1-x))_2SiO_4系列微波介质陶瓷材料

(Mg_xZn_(1-x))_2SiO_4 System Microwave Dielectric Ceramics

通过Mg2+,Zn2+相互取代,制备出(MgxZn1-x)2SiO4系列微波介质陶瓷材料。实验结果表明:在(MgxZn1-x)2SiO4体系中,Mg2+,Zn2+相互取代降低了体系的烧结温度,随着x的增加,主晶相由具有硅锌矿结构的Zn2SiO4单一相,经历Zn2SiO4和Mg2SiO4相共存,逐渐转变成具有橄榄石结构的Mg2SiO4单一相。其中(Mg0.7Zn0.3)2SiO4样品的综合性能最佳,其烧结温度低(1 400℃),介电常数εγ=6.75,介电损耗tanσ=1.86×10-3。

The Mg2SiO4-type microwave ceramics in（MgxZn（1-x））2SiO4 system were prepared.The experimental results indicate that the sintering temperature of（MgxZn（1-x））2SiO4 system was reduced with the replacement between Mg^2＋ and Zn^2＋.And with the increasing of x value,the major crystalline phases were transformed from single willemite to coexisting willemite and forsterite,and finally single forsterite.Among all samples,（Mg（0.7）Zn（0.3））2SiO4 exhibited the best properties of sintering temperature（1 400 ℃）,dielectric constant（εγ=6.75） and dielectric loss（tan σ=1.86×10^-3）.