钛酸锆-铌酸镁系高频介质陶瓷的制备及介电性能的研究

采用固相反应的方法制备粉料,合成了一种新型的(Zr1/2Ti1/2)1x(Nb2/3Mg1/3)xO2 (x=0.05～0.30)高频介质陶瓷。XRD分析确定粉料为单相,其晶相为ZrTiO4结构。瓷片在1 430～1 470℃之间烧结。讨论了收缩率与烧结温度的关系以及介电性能随烧结温度的变化,探讨了不同配比对材料电性能的影响,确定出最佳烧结温度为1 460℃。在1 MHz下测试了材料的介电常数及损耗。相对介电常数在26～34之间。配比为x=0.25的材料,品质因数可达到1×104。

Preparation and Dielectric Properties of (Zr1/2Ti1/2)1-x(Nb2/3Mg1/3)xO2 (x=0.05～0.30) Ceramics

The powder of (Zr1/2Ti1/2)1x(Nb2/3Mg1/3)xO2 (x=0.05～0.30), a new ceramic system , were prepared by solid state reaction. X-ray diffraction show that the powder is of single phase and the crystal structure of ZrTiO4, for x≤0.30. Disks were made from the powder by sintering 1 430～1 470℃. The relation between the shrinking rates and temperatures and the influence of composition and sintering temperature on dielectric properties were discussed. The optimum sintering temperature is 1 460℃. The dielectric constant and Q were measured at 1 MHz, and Q is as high as 10 000.