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- Title
Characteristics of High- Q Microwave Dielectric Ceramics Nd(Co<sub>1/2</sub>Ti<sub>1/2</sub>)O<sub>3</sub> With CuO Addition.
- Authors
Cheng-Liang Huang; Ching-Fang Tseng
- 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.
- Subjects
CERAMICS; CONSTRUCTION materials; INDUSTRIAL chemistry; MICROWAVES; DIELECTRICS; ELECTRICAL engineering materials
- Publication
Journal of the American Ceramic Society, 2007, Vol 90, Issue 8, p2409
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2007.01745.x