Yang Shuwei, Liang Bingliang, Liu Changhong, Liu Jin, Fang Caisheng, Ai Yunlong
Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang 330063, China.
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China.
Materials (Basel). 2021 Jan 17;14(2):438. doi: 10.3390/ma14020438.
The (1-)CaLaTiO-Nd(MgTi)O [(1-)CLT-NMT, = 0.35~0.60] ceramics were prepared via microwave sintering. The effects of sintering temperature and composition on the phase formation, microstructure, and microwave dielectric properties were investigated. The results show that the microwave sintering process requires a lower sintering temperature and shorter sintering time of (1-)CLT-NMT ceramics than conventional heating methods. All of the (1-)CLT-NMT ceramics possess a single perovskite structure. With the increase of , the dielectric constant () shows a downward trend; the quality factor () drops first and then rises significantly; the resonance frequency temperature coefficient () keeps decreasing. With excellent microwave dielectric properties ( = 51.3, = 13,852 GHz, = -1.9 × 10/°C), the 0.65CLT-0.35NMT ceramic can be applied to the field of mobile communications.
通过微波烧结制备了(1 - )CaLaTiO - Nd(MgTi)O[(1 - )CLT - NMT， = 0.35~0.60]陶瓷。研究了烧结温度和组成对相形成、微观结构和微波介电性能的影响。结果表明，与传统加热方法相比，微波烧结过程所需的烧结温度更低，(1 - )CLT - NMT陶瓷的烧结时间更短。所有(1 - )CLT - NMT陶瓷均具有单一的钙钛矿结构。随着 的增加，介电常数( )呈下降趋势；品质因数( )先下降后显著上升；谐振频率温度系数( )持续下降。0.65CLT - 0.35NMT陶瓷具有优异的微波介电性能( = 51.3， = 13,852 GHz， = -1.9 × 10/°C)，可应用于移动通信领域。
