(1- x)K0.5Na0.5(Nb0.95Ta0.05)O3-x(Bi0.5Yb0.5)0.95Li0.05ZrO3 陶瓷的性能

doi:10.11901/1005.3093.2024.406

材料研究学报

2025, Vol. 39

Issue (7): 542-550 DOI: 10.11901/1005.3093.2024.406

研究论文

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(1- x)K_0.5Na_0.5(Nb_0.95Ta_0.05)O₃-x(Bi_0.5Yb_0.5)_0.95Li_0.05ZrO₃ 陶瓷的性能

尹奇异(

), 张梦军(

), 斯凡, 林飞

合肥大学能源材料与化工学院合肥 230601

Structure and Properties of a Novel Piezoelectric Zirconate-modified K_0.5Na_0.5(Nb_0.95Ta_0.05)O₃ Ceramics

YIN Qiyi(

), ZHANG Mengjun(

), SI Fan, LIN Fei

School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, China

引用本文:

尹奇异, 张梦军, 斯凡, 林飞. (1- x)K_0.5Na_0.5(Nb_0.95Ta_0.05)O₃-x(Bi_0.5Yb_0.5)_0.95Li_0.05ZrO₃ 陶瓷的性能[J]. 材料研究学报, 2025, 39(7): 542-550.
Qiyi YIN, Mengjun ZHANG, Fan SI, Fei LIN. Structure and Properties of a Novel Piezoelectric Zirconate-modified K_0.5Na_0.5(Nb_0.95Ta_0.05)O₃ Ceramics[J]. Chinese Journal of Materials Research, 2025, 39(7): 542-550.

全文: PDF(9425 KB) HTML

摘要:

用传统固相烧结法制备了陶瓷材料(1-x)K_0.5Na_0.5(Nb_0.95Ta_0.05)O₃-x(Bi_0.5Yb_0.5)_0.95Li_0.05ZrO₃，使用X射线衍射仪、扫描电子显微镜、能谱仪等手段对其表征，研究了这种陶瓷材料的结构和性能。结果表明，锆酸铋镱锂(BYLZ)完全进入到KNNT晶格中生成了单一的钙钛矿结构： x = 0.0的陶瓷为O相，0.0 < x ≤ 0.02的陶瓷为O-T相，0.03 < x ≤ 0.04的陶瓷为R-O-T相，0.04 < x ≤ 0.05的陶瓷为T相。在x = 0.04多晶型相界区的陶瓷，其性能最佳(d₃₃ = 305 pC/N，k_p = 38.17%，ε_r = 1710，tanδ = 2.5%，P_r = 34.63 μC/cm²，E_C = 20.67 kV/cm，T_C = 340 ℃)。

关键词 ：无机陶瓷材料, 无铅压电陶瓷, 固相烧结法, 多相共存

Abstract：

A novel piezoelectric ceramics (1-x)K_0.5Na_0.5(Nb_0.95Ta_0.05)O₃-x(Bi_0.5Yb_0.5)_0.95Li_0.05ZrO₃was prepared by the conventional solid-phase sintering method, and then was characterized by means of XRD, SEM, EDS, etc. It can be determined that BYLZ incorporates completely into the KNNT lattice in an atomic substitution manner, thereby forming a single perovskite structure, namely, the ceramics is O phase for x = 0.0, O-T phase for x in the range 0.0 < x ≤ 0.02, R-O-T phase for x in the range 0.03 < x ≤ 0.04, and T phase for x in the range 0.04 < x ≤ 0.05. Performance tests show that ceramics achieve the best performance in the polymorphic phase boundary region of x = 0.04:i.e., d₃₃ = 305 pC/N, k_p= 38.17%, ε_r = 1710, tanδ = 2.5%, P_r = 34.63 μC/cm², E_C= 20.67 kV/cm, and T_C = 340 °C.

Key words： inorganic ceramic materials lead-free piezoelectric ceramics solid-phase sintering multiphase coexistence

收稿日期: 2024-10-03

ZTFLH:

TN384

基金资助:安徽省教育厅自然科学基金(2022AH010096);2022年新时代教育素质工程(2022xscx146)

通讯作者: 尹奇异，教授，yinqyi@163.com，研究方向为压电/铁电材料、储能材料;
张梦军，3229880447@qq.com，研究方向为压电陶瓷

Corresponding author: YIN Qiyi, Tel: 19541820704, E-mail: yinqyi@163.com;
ZHANG Mengjun, Tel: 15156557941, E-mail: 3229880447@qq.com

作者简介: 尹奇异，男，1978年生，博士

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链接本文:

https://www.cjmr.org/CN/10.11901/1005.3093.2024.406 或 https://www.cjmr.org/CN/Y2025/V39/I7/542

图1 (1-x)KNNT-xBYLZ陶瓷的XRD谱

图2 陶瓷的低温介电常数εr

图3 XRD谱的Rietveld拟合曲线

表1 陶瓷(1-x)KNNT- xBYLZ的晶体结构参数

图4 (1-x)KNNT-xBYLZ陶瓷表面的微观形貌

图5 (1-x)KNNT-xBYLZ陶瓷的密度和相对密度与x的关系

图6 (1-x)KNNT-xBYLZ陶瓷的晶粒尺寸分布

图7 (1-x)KNNT-xBYLZ陶瓷的压电常数d33、平面机电耦合系数kp、介电常数εr和介电损耗tanδ与x的关系

图8 (1-x)KNNT-xBYLZ陶瓷的介电温谱和相图

图9 (1-x)KNNT-xBYLZ陶瓷的电滞回线、剩余极化强度Pr、矫顽场EC、介电常数与剩余极化强度之积εrPr和压电常数d33

表2 本文的实验数据与其他KNN基压电陶瓷各项电性能的对比

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