期刊论文

Zhang, Z.-Y.

中文

液晶与显示

1007-2780

2023

38

2

139-148

10.37188/CJLCD.2022-0325

Supported by National Equipment Development Department Pre-research Fund（No. 61409230701）；Key-Area Research and Development Program of Guangdong Province（No. 2019B010158001）.

本校为第一机构

液晶微波通信器件所用的液晶材料都是高双折射率(Δn)液晶化合物组合而成,这些化合物的熔点大多较高,使得液晶组合物的低温共熔点较高,不利于微波通信器件的发展。本文合成了8种侧乙基三苯二炔类液晶化合物,将其按照一定的比例配置成低温共熔点在-46 ℃的液晶组合物MA,并以此为液晶母体,将其与另外几种液晶混合,采用矩形谐振腔微扰法测试液晶组合物在微波频段(11~35 GHz)的介电性能,得到了在18 GHz时的介电常数值(Δεr)为0.954,最大介电损耗(tanδεr max)为0.008 6,可满足微波用低熔点液晶材料的性能要求。

The liquid crystal materials used for liquid crystal microwave communication devices are composed of high birefringence liquid crystal compounds，most of which have higher melting points，making the liquid crystal compositions have higher low temperature eutectic points， unfavorable for the development of microwave communication devices. In this paper，eight kinds of fluorinated ethyl triphenyldialkyne liquid crystal compounds were designed and synthesized，and configured them in a certain ratio to form a liquid crystal composition MA with a l...