Low temperature densification and dielectric characterization of CeO2 ceramics

Dönmez M., ERDOĞAN M., DURAN C.

Journal of the European Ceramic Society, vol.44, no.3, pp.1610-1616, 2024 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 3
  • Publication Date: 2024
  • Doi Number: 10.1016/j.jeurceramsoc.2023.10.062
  • Journal Name: Journal of the European Ceramic Society
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Page Numbers: pp.1610-1616
  • Keywords: CeO2, Densification, Dielectric properties, Sintering
  • Ankara Yıldırım Beyazıt University Affiliated: Yes

Abstract

A near full densification is essential to obtain high dielectric constant and quality factor together with minimum dielectric loss for microwave dielectrics. Limited densification of CeO2 ceramics was improved by using 5 wt% anorthite-based glass and a high densification between 1050 °C and 1150 °C range (e.g., relative density 97.5–99%) was successfully obtained. Phase analysis revealed a cubic CeO2 phase without any crystalline secondary phases formed. Dielectric properties followed the densification path such that maximum dielectric constant (minimum dielectric loss) was obtained at 1150 °C as 21.36 (0.0040) at 5 MHz. The unloaded quality factor (Q), resonance-frequency dependent quality factor (Qxf), and dielectric constant (loss) for a TEM mode dielectric resonator were calculated as 445, 1288 GHz, and 21 (0.0022), respectively. The CeO2-(anorthite-based) glass ceramic was studied for the first time in literature and the results are promising from the low temperature densification and microwave properties points of views.