CAJ | 학술논문

利用原位XRD技术研究未极化掺镧锆钛酸铅(PLZT)铁电陶瓷在不同直流电场加载过程中(002)和(200)衍射峰峰强与电场强度的关系，基于铁电畴取向分布的考虑，对(002)和(200)衍射峰峰强进行定量分析。通过对原位XRD谱进行四方相和单斜相的分峰拟合处理，初步探讨电场强度对铁电陶瓷电致畴变和电致相变的影响。结果表明：对于 PLZT 试样，在电场加载过程中除了发生电致90°畴变外，还可能发生从四方相到单斜相的电致相变。在不同电场强度作用下，电致畴变与电致相变是一个相互竞争的过程，电致畴变是主要的，而电致相变相对减少。
이용원위XRD기술연구미겁화참란고태산연(PLZT)철전도자재불동직류전장가재과정중(002)화(200)연사봉봉강여전장강도적관계，기우철전주취향분포적고필，대(002)화(200)연사봉봉강진행정량분석。통과대원위XRD보진행사방상화단사상적분봉의합처리，초보탐토전장강도대철전도자전치주변화전치상변적영향。결과표명：대우 PLZT 시양，재전장가재과정중제료발생전치90°주변외，환가능발생종사방상도단사상적전치상변。재불동전장강도작용하，전치주변여전치상변시일개상호경쟁적과정，전치주변시주요적，이전치상변상대감소。
Variations of the peak intensities of (002) and (200) diffraction peaks (I (002) , I (200) ) with the applied electric fields were studied by in-situ X-ray diffraction method during the applications of different electric fields on the unpoled lanthanum-doped lead zirconate titanate (PLZT) ceramics. Considering the distribution of domain orientation, the quantitative analyses of peak intensities of I(002) and I(200) were performed. Based on the multi-peak curve fitting to the in-situ XRD spectra, the effects of the applied electric fields on the electric-field-induced domain switching and phase transition were preliminarily discussed. The results show that the electric-field-induced 90° domain switching occurs in PLZT specimens under the applied electric fields, at the same time, the electric-field-induced phase transition from tetragonal to monoclinic could also happen. The electric-field-induced domain switching and phase transition occur competitively in different electric fields. The major process is domain switching, while the minor process is phase transition.