Anti-reductive characteristics and dielectric loss mechanisms of Ba2ZnSi2O7 microwave dielectric ceramic. Issue 15 (15th October 2019)

• Record Type: Journal Article
• Authors: Zou, Zheng-Yu; Du, Kang; Lan, Xue-Kai; Lu, Wen-Zhong; Wang, Xiao-Chuan; Wang, Xiao-Hong; Lei, Wen
• Is Part Of: Ceramics international. Volume 45:Issue 15(2019)
• Page Start: 19415
• Page End: 19419
• Publication Date: 2019-10-15
• Subjects: Silicates -- Electroceramics -- Impedance spectroscopy -- Anti-reductive characteristics; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.06.195
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Ba2 ZnSi2 O7 ceramic was prepared by conventional solid-state method and sintering under four different atmospheres (air, O2, N2, and N2 –1 vol% H2 ). The Ba2 ZnSi2 O7 ceramic exhibited a single phase under air, O2, and, N2, whereas two phases (including BaSiO3 impurity) were observed under the N2 –1 vol% H2 atmosphere due to Zn 2+ evaporation. Dielectric loss was proportional to oxygen partial pressure due to the conduction mechanism of dominant holes. The Ba2 ZnSi2 O7 ceramic exhibited good microwave dielectric properties ( ε r = 8.3, Q × f = 27200 GHz, τ f = −41.5 ppm/°C) under the N2 –1 vol% H2 atmosphere, making it a novel candidate with good anti-reductive characteristics for base metal electrode–multilayer ceramic capacitor applications.