Title: Barium titanate-based X8R ceramics with high dielectric constant by adding Zn-B-Si-O nanocomposites

Authors: Mei Li; Bin Cui; Zhen-Yu Hu; Yan Wang; Wen-Qing Yan

Addresses: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xian, Shaanxi, 710069, China ' Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xian, Shaanxi, 710069, China ' Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xian, Shaanxi, 710069, China ' Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xian, Shaanxi, 710069, China ' Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xian, Shaanxi, 710069, China

Abstract: BaTiO₃-based X8R dielectric materials were obtained by doping nano-size Zn-B-Si-O (ZBSO) during sintering, which was synthesised using a sol-gel method, and showed high activity and great dispersion properties. Moreover, the dielectric property of the ceramics was influenced by the ZBSO content and sintering temperature. When 3.0 wt% ZBSO nanocomposite was added, the ceramics sintered at as low as 1,150°C showed super dielectric properties that the dielectric constant was > 3,100 at 25°C and dielectric loss was lower than 2.0%. Of importance is that the temperature stability was improved with dielectric constant variation being less than ± 15% up to 150°C, meeting X8R standard.

Keywords: X8R ceramics; sintering temperature; dielectric constant; sintering aids; barium titanate; nanocomposites; nanotechnology; sol-gel; temperature stability; zinc; silicon.

DOI: 10.1504/IJNM.2014.059006

International Journal of Nanomanufacturing, 2014 Vol.10 No.1/2, pp.152 - 159

Received: 25 Jan 2013
Accepted: 24 Apr 2013
Published online: 17 May 2014 *

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