Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 43, Issue 3, Pages 755-760Publisher
SPRINGER
DOI: 10.1007/s11664-013-2952-x
Keywords
Lead-free piezoelectric ceramic; temperature stability; electrical properties; electroceramics
Categories
Funding
- National Nature Science Foundation of China [61361007, 61261012, 11364008]
- Guangxi Education Department Foundation [201012MS083]
- Guangxi Key Laboratory of Information Materials [1210908-206-Z, 1210908-222-Z]
- Guangxi Experiment Center of Information Science Foundation [20130316]
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B-site complex ion (Mg1/3Nb2/3)-modified high-temperature ceramics 0.71BiFeO(3)-0.29BaTi(1-x) (Mg1/3Nb2/3) (x) O-3 (BF-BTMNx) have been fabricated by the conventional solid-state reaction method. The compositional dependence of thea phase pound structure, electrical properties, and depolarization temperature of the ceramics was studied. The main phase structure of BF-BTMNx ceramics is perovskite phase with pseudocubic symmetry. The experimental results show that the dielectric and piezoelectric properties, and temperature stability strongly depend on the (Mg1/3Nb2/3)(4+) content. The optimum (Mg1/3Nb2/3) content enhances the piezoelectric properties, Curie temperature, and depolarization temperature. The ceramic with x = 1% exhibited enhanced electrical properties of d (33) = 158 pC/N and k (p) = 0.322, combined with high-temperature stability with Curie temperature of T (c) = 453A degrees C and depolarization temperature of T (d) = 400A degrees C. These results show that the ceramic with x = 1% is a promising lead-free high-temperature piezoelectric material.
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