کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1609804 1516269 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evolution of textured microstructure of Li-doped (K,Na)NbO3 ceramics prepared by reactive templated grain growth
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Evolution of textured microstructure of Li-doped (K,Na)NbO3 ceramics prepared by reactive templated grain growth
چکیده انگلیسی


• The texture development of KNLN ceramics in RTGG process is clarified.
• The templated grains showed cubic-like feature instead of plate-like in the textured ceramics.
• The piezoelectric properties of textured ceramics are improved greatly compared to nontextured ceramics.

(K0.45Na0.55)0.94Li0.06NbO3 (KNLN) ceramics with high texture degree (Lotgering factor f = 94%) were prepared by reactive templated grain growth (RTGG) using plate-like NaNbO3 (NN) templates. XRD patterns and SEM micrographs of the samples fabricated at different stages of RTGG were investigated. The XRD results revealed that NN templates reacted with KNLN matrix particles to form a solid solution at the first stage of RTGG. Then the significant template growth could only start when the sample’s relative density was higher than 90%. SEM observations revealed that the templated grains showed cubic-like feature instead of plate-like feature of NN template particles finally. The process of texture development and mechanism of template growth were discussed in detail. The piezoelectric coefficient d33 and electromechanical coupling factor kt of textured ceramics were 70% and 80% higher than that of nontextured ceramics with the same composition, respectively.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 624, 5 March 2015, Pages 158–164
نویسندگان
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