Dielectric properties and microstructures of non-reducible high-temperature stable dielectrics based on 0.9474BaTiO3-0.0526Ba2LiTa5O15. (August 2017)

• Record Type: Journal Article
• Authors: Li, Jian-Hua; Liu, Yi-Xin; Wang, Sea-Fue; Hung, Yen-Po
• Is Part Of: Ceramics international. Volume 43(2017)Supplement 1
• Page Start: S79
• Page End: S84
• Publication Date: 2017-08
• Subjects: Temperature-stable dielectric -- X9R -- MLCC -- Microstructure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.05.230
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, non-reducible high-temperature stable dielectrics based on 0.95BaTiO3 -0.05Ba2 LiTa5 O15 compound with various dopants including Li2 TiO3, MnCO3, CaCO3 and SiO2 were prepared through solid state reaction. The best composition obtained was 0.95BaTiO3 -0.05Ba2 LiTa5 O15 with the addition of 5 mol% Li2 TiO3, 1.5 mol% MnCO3, 2.0 mol% CaCO3 and 1.0 mol% SiO2 . After being sintered at 1070 °C for 2 h in 3% H2 -97%N2 -3%H2 and heat-treated at 950 °C for 6 h in an atmosphere containing 100 ppm O2, the dielectric properties including temperature coefficient of capacitance (TCC): −3.6% at −55 °C and −9.2% at 200 °C, tanδ: 1.4% (−55 °C) and 11.2% (200 °C), electrical resistance: 1.2 × 10 11 Ω-cm at 25 °C and 7.5 × 10 9 Ω-cm at 200 °C, and dielectric constant: 800 at 25 °C, were obtained, which meet the X9R requirements of EIA specifications.