Reducing the sintering temperature of (In0.5Nb0.5)0.05Ti0.95O2 ceramics by adding B2O3 sintering aid. (September 2021)

• Record Type: Journal Article
• Authors: Xu, Panpan; Wang, Yupeng; Hao, Wentao; Sun, Li; Cao, Ensi; Zhang, Yongjia
• Is Part Of: Journal of physics and chemistry of solids. Volume 156(2021)
• Publication Date: 2021-09
• Subjects: (In0.5Nb0.5)1-xTixO12 ceramics -- Sintering temperature -- Sintering aid -- B2O3; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2021.110155
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: TiO2 ceramics co-doped with In and Nb exhibit unusual large dielectric-permittivity phenomena, but their sintering temperature is essentially higher than 1400 °C and the holding time is usually longer than 5 h, which is very uneconomical for industrial production and practical applications. Therefore, to maintain the relatively good dielectric properties of In and Nb co-doped TiO2 ceramics and reduce the sintering temperature to about 1300 °C, B2 O3, was added as a sintering aid to prepare B2 O3 /(In0.5 Nb0.5 )0.05 Ti0.95 O2 ceramics in this paper. The crystalline structures, microstructures, and electrical properties were investigated and discussed. The results showed that the sintering temperature of B2 O3 /(In0.5 Nb0.5 )0.05 Ti0.95 O2 ceramics indeed prominently decreased, but their dielectric loss was relatively large, possibly caused by the pores left following B2 O3 volatilization. Highlights: B2 O3 added to In and Nb co-doped TiO2 (INTO) ceramics to reduce sintering temperature. The sintering temperature of INTO-based ceramics was reduced to about 1300 °C. Effects on microstructure and dielectric properties of INTO ceramics were discussed.