Enhanced electrical properties and Vickers hardness of calcium bismuth niobate ceramics by W/Co substituted at B-site  

作　　者：Fei Wang Jia Yang Qing Yang Ning Chen Xinji Yang Mingyue Mo Jie Xing Zhi Tan Zhongqing Tian Fancheng Meng Yuheng Guo Huixing Lin Jianguo Zhu 

机构地区：[1]College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,P.R.China [2]College of Materials Science and Engineering,Sichuan University,Chengdu 610064,P.R.China [3]School of Electronic Engineering,Chengdu Technological University,Chengdu 611730,P.R.China [4]Key Laboratory of Inorganic Functional Material and Device,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,P.R.China

出　　处：《Journal of Advanced Dielectrics》2024年第4期92-103,共12页先进电介质学报（英文）

基　　金：supported by the National Natural Science Foundation of China[51932010,12004267];Natural Science Foundation Project of Chongqing Science&Technology Commission[CSTB2024NSCQ-MSX2081];Scientific and Technological Research Program of Chongqing Municipal Education Commission[KJQN202401132];Open Project Fund of Key Laboratory of Inorganic Functional Materials and Devices,ChineseAcademy of Sciences[KLIFMD202311];Sichuan Science and Technology Program[23ZDYF0173];the Cultivation Project of CQUT for Research and Innovation Group.

摘　　要：Calcium bismuth niobate(CBN)ceramic,as a core element of high-temperature piezoelectric sensors,has attracted widespread attention due to its high Curie temperature within the class of Aurivillius compounds.However,CBN usually faces two shortcomings.poor piezoelectric constant and low resistivity.In this work,CBN-based ceramics with donor–acceptor ions(W/Co)co-substituted at B-site were prepared by solid-state reaction method,and structure–property relationship of ceramics was studied in detail.Co-substitution of W/Co ions effectively improved the electrical property and hardness of CBN ceramics.CaBi_(2)Nb_(1.91)(W_(2/3)Co_(1/3)T_(0.09)O_(9))exhibits enhanced electrical and mechanical properties including high resistivity of-10^(7)Ω·cm at 500℃,piezoelectric constant of-15.3 pC/N and hardness value of-3.57 GPa.These values are two orders of magnitude,over two times,and 1.36 times higher than those of pure CBN ceramic,respectively.This work provides a reference for exploring other bismuth-layered structural ceramics.

关 键 词：Calcium bismuth niobate ceramics donor and acceptor ions B-site electrical properties Vickers hardness 

分 类 号：TM28[一般工业技术—材料科学与工程]