添加PbO對La4Ti9O24微波陶瓷性質之影響

Abstract

本研究利用PbO覆蓋於La4Ti9O24陶瓷基材上，分別改變不同的持溫溫度以及時間，觀察Pb2+在La4Ti9O24中的擴散行為以及反應層的變化。 另一方面，利用添加PbO在La4Ti9O24微波陶瓷中，製作出La2/3TiO3微波陶瓷，藉由改變不同的PbO添加量(x=0.3~3)以及燒結溫度(1250℃、1300℃、1350℃)，觀察微波性質的變化。在x=3、1300℃下燒結4hr可以得到介電常數92，Q值約1129的微波陶瓷體。

There are two part of discussions were included in this study. The first part we cover the PbO on the La4Ti9O24 substract , by changing the holding temperature and time, discussing the diffusion mechanism and the thickness change of reaction layer. The second part is adding PbO on La4Ti9O24 to synthesize (Pbx,La1-x)2/3TiO2.993. By controling the composition of PbO-La4Ti9O24 and the sintering temperature(1250℃, 1300℃, 1350℃), analyze the difference in microwave properties. In the following conditions: x=3, 1300℃/4 hours, the microwave ceramics have permittivity=92 and dielectric loss=112