Dielectric glass ceramics for antenna applications

微晶玻璃是通过控制玻璃的析晶来制备的。利用微晶玻璃的热性能和机械性能有很多应用，但近年来，微晶玻璃在从天线的毫米波介质基板到电力电子电容器的高击穿强度介质的一系列应用中引起了极大的兴趣。该项目将探索适用于各种应用的微晶玻璃的新配方，目的是探索它们复杂的析晶行为，以及它如何影响广泛频率范围内的性能。学生将使用X射线衍射和扫描和透射电子显微镜相结合的方法对材料的结构和微观结构进行表征，并使用产生的数据来解释作为组成和温度函数的介电行为。

Glass-ceramics are fabricated by the controlled devitrification of glass. There are many applications which make use of glass ceramics for their thermal and mechanical properties but recently there has been significant interest glass-ceramic for a range of applications varying from MW dielectric substrates for antennas to high breakdown strength dielectrics for capacitors in power electronics. This project will explore new formulations of glass ceramics for a range of applications with the aim to explore their complex crystallisation behaviour and how it influences properties over a wide range of frequencies. The student will structurally and microstructurally characterise the materials using a combination of X-ray diffraction and scanning and transmission electron microscopy and use the data generated to interpret dielectric behaviour as a function of composition and temperature.