Microwave Dielectric Properties of CdWO₄ Ceramics Prepared by Using High-energy Ball-milling Method

Abstract

The CdWO₄ compound was prepared from CdO and WO₃ mixtures by high energy ball milling method and its microwave dielectric properties have been investigated. After milling 30 h, pure and well-crystallized CdWO₄ powders with an average grain size of 230 nm were obtained at 125°C. The CdWO₄ ceramics sintered at 950–1100°C have monoclinic structure belong to the space group P2/c(13), and when sintered at 1025°C, the ceramics exhibited good dielectric constant (ϵ_r) of ∼ 12.81, Q×f of ∼27000 GHz and τ_f of ∼−19.3 ppm/°C.

Keywords:

• CdWO₄
• high energy ball milling
• ceramics
• microwave dielectric properties

Funding

The work was supported by the Natural Science Foundation of China (Grants Nos. 51272150, 51072110).