Effects of sintering parameters and Nd doping on the microwave dielectric properties of Y2O3 ceramics. Issue 7 (15th May 2016)

• Record Type: Journal Article
• Authors: Zhang, Xiaorong; Fan, Guifen; Wang, Xiaohong; Lei, Wen; Fei, Liang; Lu, Wenzhong
• Is Part Of: Ceramics international. Volume 42:Issue 7(2016)
• Page Start: 7962
• Page End: 7967
• Publication Date: 2016-05-15
• Subjects: Y2O3 ceramics -- Sintering temperature -- Microstructure -- Microwave dielectric properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.01.192
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Y2 O3 ceramics with good dielectric properties were prepared via co-precipitation reaction and subsequent sintering in a muffle furnace. The effects of Nd doping and sintering temperature on microwave dielectric properties were studied. With the increase in sintering temperature, the density, quality factor ( Q × f ), and dielectric constant ( ε r ) values of pure Y2 O3 ceramics increased to the maximum and then gradually decreased. The Y2 O3 ceramics sintered at 1500 °C for 4 h showed optimal dielectric properties: ε r =10.76, Q × f =82, 188 GHz, and τ f =−54.4 ppm/°C. With the addition of Nd dopant, the Q × f values, ε r, and τ f of the Nd: Y2 O3 ceramics apparently increased, but excessive amount degraded the quality factor. The Y2 O3 ceramics with 2 at% Nd2 O3 sintered at 1460 °C displayed good microwave dielectric properties: ε r =10.4, Q × f =94, 149 GHz and τ f =−46.2 ppm/°C.