CAJ | 학술논문

用低频倒置扭摆对改性偏铌酸铅?铁电陶瓷的内耗进行了研究. 在新加工的样品中发现了六个内耗峰，分别位于70C(P1峰)、90C(P2峰)、200C(P3峰)、260C(P4峰)、430C(P5峰)和510C(P6峰)处. 对引起P3、P1、P2和P4峰的物理机制进行了详细探讨. 分析结果表明，P3峰的本质是一宽化的Debye弛豫内耗峰，相应的激活能和指前因子分别为1.01eV和2.410-14s. ?它源于氧空位与畴壁的相互作用. P1、P2和P4峰与试样的切割加工密切相关，可归结为点缺陷与位错的交互作用.
용저빈도치뉴파대개성편니산연?철전도자적내모진행료연구. 재신가공적양품중발현료륙개내모봉，분별위우70C(P1봉)、90C(P2봉)、200C(P3봉)、260C(P4봉)、430C(P5봉)화510C(P6봉)처. 대인기P3、P1、P2화P4봉적물리궤제진행료상세탐토. 분석결과표명，P3봉적본질시일관화적Debye이예내모봉，상응적격활능화지전인자분별위1.01eV화2.410-14s. ?타원우양공위여주벽적상호작용. P1、P2화P4봉여시양적절할가공밀절상관，가귀결위점결함여위착적교호작용.
The internal friction Q-1 of Lead Metaniobate ceramics was investigated by inverted torsion pendulum. Six internal friction peaks, with their location around 70C(P1), 90C(P2), 200C(P3), 260C(P4), 430C(P5) and 510C(P6), respectively, were observed in a freshly-worked PbNb2O6 ceramics. The mechanisms for P3, P1, P2 and P4 were analyzed in detail. P3 is a broadened Debye relaxation peak in nature, and its corresponding activation energy and pre-exponential factor are 1.01eV and 2.510-12s, respectively. This peak is attributed to the interaction between domain walls and oxygen vacancies. P1, P2, and P4 are clearly related to the working processes. They can be caused by the interaction between dislocations and point defects.