铁电单晶三维定向的X射线衍射方法

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (9): 1576-1581.

铁电单晶三维定向的X射线衍射方法

唐海跃^1,2,3, 张文杰², 杨晓明², 苏榕冰², 王祖建², 龙西法^2,3, 何超^2,3

1.福州大学化学学院,福州 350108;
2.中国科学院福建物质结构研究所,福州 350002;
3.中国科学院大学福建学院,福州 350002

收稿日期:2023-03-04 出版日期:2023-09-15 发布日期:2023-09-19
通信作者: 何超,博士,研究员。E-mail:hechao@fjirsm.ac.cn
作者简介:唐海跃(1999—),男,江苏省人,硕士研究生。E-mail:tanghaiyue@fjirsm.ac.cn
基金资助:
国家自然科学基金(52172009,12275274);福建省工业引导项目(2020H0038,2021H0043);中国科学院青年培育项目(JCPYJJ-22032)

Three-Dimensional Orientation of Ferroelectric Single Crystals Using X-Ray Diffraction Method

TANG Haiyue^1,2,3, ZHANG Wenjie², YANG Xiaoming², SU Rongbing², WANGH Zujian², LONG Xifa^2,3, HE Chao^2,3

1. College of Chemistry, Fuzhou University, Fuzhou 350108, China;
2. Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou 350002, China;
3. Fujian College, University of Chinese Academy of Sciences, Fuzhou 350002, China

Received:2023-03-04 Online:2023-09-15 Published:2023-09-19

摘要/Abstract

摘要： 目前采用坩埚下降法生长的弛豫铁电单晶为圆柱状晶体,无自然结晶面,晶体在切割加工前必须进行三维定向。本文提出了一种利用粉末X射线衍射仪和X射线定向仪确定铁电单晶三维方向的简便方法。通过粉末X射线衍射仪确定任意切割晶面的最强衍射峰,然后利用X射线定向仪确定最强衍射峰准确的切割面,再通过X射线定向仪确定两个晶面的交线方向,从而获取晶体的三维方向,进而指导晶体切割加工。使用该方法对Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃铁电单晶进行三维定向,结果证明该定向方法具有准确度高、效率高、操作方便、晶体损耗少的特点。该方法也适用于其他晶体材料的定向。

关键词: 晶体定向, XRD, 铁电单晶, 三维定向, 定向仪

Abstract: The relaxor-based ferroelectric single crystals grown by vertical Bridgman method are cylindrical ingots with no natural crystallization face. The crystallographic orientations are required before cutting and processing. In this work, we proposed a simple method for determining crystallographic orientations of ferroelectric single crystal using powder X-ray diffractometer and X-ray orientation instrument. Firstly, the Miller indices of the strongest diffraction peak of arbitrarily cut plane are determined by a powder X-ray diffractometer. Secondly, the cut plane of crystal ingots is determined according to the Miller indices of the strongest diffraction peak by an X-ray orientation instrument. Thirdly, the intersection direction of the two crystallographic planes is obtained by X-ray orientation instrument. The three-dimensional orientations of ferroelectric single crystal are obtained based on the intersection direction and the crystallographic planes of the strongest diffraction peak. The application of this method to Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ single crystals demonstrates that it is a high accurate, high efficient, convenient, and waste-free method for crystallographic orientation. In addition, this method is also suitable for other crystals.

Key words: crystal orientation, XRD, ferroelectric single crystal, three-dimensional orientation, orientation instrument

中图分类号:

唐海跃, 张文杰, 杨晓明, 苏榕冰, 王祖建, 龙西法, 何超. 铁电单晶三维定向的X射线衍射方法[J]. 人工晶体学报, 2023, 52(9): 1576-1581.

TANG Haiyue, ZHANG Wenjie, YANG Xiaoming, SU Rongbing, WANGH Zujian, LONG Xifa, HE Chao. Three-Dimensional Orientation of Ferroelectric Single Crystals Using X-Ray Diffraction Method[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(9): 1576-1581.

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