期刊
CERAMICS INTERNATIONAL
卷 40, 期 2, 页码 3199-3207出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.09.122
关键词
Grain growth; Lead free piezoelectric; Alkali niobates; Single crystal growth; Raman scattering
资金
- National Research Foundation of Korea (Ministry of Education, Science and Technology) [2012R1A1A2000925]
- National Research Foundation of Korea [2012R1A1A2000925] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Lead zirconate titanate (PZT) piezoelectric ceramics are commonly used in various applications, e.g. gas igniters, high-voltage generators and microbalances. However, due to increasing health and environmental concerns over their high lead content, lead-free piezoelectric ceramics are being developed. Lead-free piezoelectric single crystals offer superior performance over their polycrystalline counterparts but are difficult to grow by conventional methods. In this paper, (K0.5Na0.5)NbO3-SrTiO3 (KNN-ST) single crystals are grown for the first time by the solid state crystal growth (SSCG) method. < 100 > KTaO3 single crystal seeds are buried in the center of pellets of pressed KNN-ST powder. The single crystal grows from the seed crystal during sintering at 1100 degrees C for 20 h. The grown single crystals contain porosity, which is incorporated from the matrix during growth. The effect of SrTiO3 addition on single crystal growth behavior, chemical composition and structure is evaluated. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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