Enhanced electrical resistivity and mechanical properties in BCTZ-based composite ceramic

Journal of Advanced Dielectrics. 2019;9(5):1950036-1-1950036-7 DOI 10.1142/S2010135X1950036X

 

Journal Homepage

Journal Title: Journal of Advanced Dielectrics

ISSN: 2010-135X (Print); 2010-1368 (Online)

Publisher: World Scientific Publishing

LCC Subject Category: Science: Physics: Electricity and magnetism: Electricity

Country of publisher: Singapore

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS


Xiaodong Yan (Key Laboratory of Advanced Functional Materials, Education Ministry of China College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, P. R. China)

Mupeng Zheng (Key Laboratory of Advanced Functional Materials, Education Ministry of China College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, P. R. China)

Mankang Zhu (Key Laboratory of Advanced Functional Materials, Education Ministry of China College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, P. R. China)

Yudong Hou (Key Laboratory of Advanced Functional Materials, Education Ministry of China College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, P. R. China)

EDITORIAL INFORMATION

Peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 18 weeks

 

Abstract | Full Text

Environmental and human health concerns about lead toxicity have prompted the development of lead-free piezoceramics. Among them, (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCTZ) with excellent piezoelectric properties has the most potential and attracts extensive attention. However, lack of concern toward electrical resistivity and mechanical properties has greatly hindered its practical application. Here, we report the achievement of enhanced insulation characteristics (grain electrical resistivity increased by one order of magnitude) and superior mechanical properties (Vickers hardness value increased by 40%) in Al2O3-added BCTZ composite ceramics. Such improvement can be attributed to specific composite microstructure, where the nonferroelectric second phase dispersed in the grain interior and grain boundary of BCTZ matrix results in blocking effect on the electric current paths as well as propagation of microcracks. These findings will pave a new way for the practical application of BCTZ ceramics.