Structure and electrical properties of new Aurivillius oxides (K_0.16Na_0.84)_0.5Bi_4.5Ti₄O₁₅ with manganese modification

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• 作者：Pinyang Fang^a ; ^b ; ^{fpy_2000@163.com" class="auth_mail} ; Peng Liu^b ; Zengzhe Xi^a ; Wei Long^a ; Xiaojuan Li^a
• 关键词：Aurivillius oxide ; Piezoelectric properties ; Resistivity
• 刊名：Journal of Alloys and Compounds
• 出版年：15 May, 2014
• 年：2014
• 卷：595
• 期：Complete
• 页码：148-152
• 全文大小：1276 K

文摘

Aurivillius oxides, (K_0.16Na_0.84)_0.5Bi_4.5Ti₄O₁₅ (KNBT) with manganese doping, were synthesized by using the conventional solid state reaction method. Influence of manganese doping on structure and electric properties of the KNBT ceramics was investigated. Phase analysis was performed by X-ray diffraction analyses (XRD) and Raman spectroscopy. Microstructural morphology was assessed by the scanning electron microscopy (SEM). Piezoelectric performances of manganese modified KNBT ceramics were improved significantly compared with that of the KNBT ceramic. The maximum of piezoelectric coefficient (d₃₃) was found to be 28 pC/N for the KNBT-Mn50 ceramic, together with high Curie temperature (T_c 鈭?#xA0;657 掳C) and high resistivity (higher than 10⁶ 惟 cm). In addition, excellent temperature stability of piezoelectric performances was exhibited for manganese modified KNBT lead-free piezoelectric ceramics.