Improvement in the piezoelectric temperature stability of(K_(0.5)Na_(0.5))NbO_3 ceramics

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（22）
• 页码范围: 2389-2393
• 页数: 5页
• 分类号: TM282
• 语种: 中文

摘要

Through an analysis of the temperature stability of(K0.5Na0.5)NbO3(KNN)based ceramics and KNN solid solutions,we propose a method to enhance the temperature stability of KNN materials.These materials are valuable for their piezoelectric properties.To verify the feasibility of this method,0.9(K1-xNax)NbO3-0.06LiNbO3-0.04CaTiO3(KNLN-CaTiO3)ceramics were designed,and their structure and properties were studied.The results show that KNLN-CaTiO3(x=0.54)ceramics have a good temperature stability over a wide temperature range(25-320°C).Also,they have good piezoelectric properties(d33=152 pC/N in x=0.54).This result confirms the feasibility of our proposed solution for improving the piezoelectric properties of KNN-based ceramics that have poor temperature stability.