Characteristics of High-Q Microwave Dielectric Ceramics Nd(Co1/2Ti1/2)O3 With CuO Addition |
| |
Authors: | Cheng-Liang Huang Ching-Fang Tseng |
| |
Affiliation: | Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, Republic of China |
| |
Abstract: | We report the microwave dielectric properties and the microstructures of Nd(Co1/2Ti1/2)O3 ceramics prepared by the conventional solid-state route. The prepared Nd(Co1/2Ti1/2)O3 exhibits a mixture of Co and Ti showing a 1:1 order in the B site. Lowering the sintering temperature (as low as 1260°C) and promoting the densification of Nd(Co1/2Ti1/2)O3 ceramics could be effectively achieved by adding CuO (up to 0.75 wt%). At 1350°C, Nd(Co1/2Ti1/2)O3 ceramics with 0.5 wt% CuO addition possess a dielectric constant (ɛr) of 27.6, a Q × f value of 165 000 GHz (at 9 GHz), and a temperature coefficient of resonant frequency (τf) of −20 ppm/°C. By comparing with pure Nd(Co1/2Ti1/2)O3 ceramics, incorporating additional CuO helps to render a dielectric material with a higher dielectric constant, a smaller τf value, and a 20% dielectric loss reduction, which makes it a very promising candidate for applications requiring low microwave dielectric loss. |
| |
Keywords: | |
|
|