Phase transition at low temperature in NaNbO3 ceramic

被引：76

作者：

Lanfredi, S

Lente, MH

Eiras, JA

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 15期

关键词：

Dielectric permittivities - Electric permittivities - Low temperatures - Relaxor ferroelectric materials - Sodium niobate - Temperature range;

D O I：

10.1063/1.1470260

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electric permittivity of the sodium niobate ceramic was investigated in the temperature range from 15 up to 900 K, at frequencies from 100 Hz to 1 MHz. Three anomalies were found in the permittivity curve. A phase transition for NaNbO3 was assigned to anomaly at around 280 K, while other two ones have previously been reported. In addition, the dielectric permittivity dependence with the temperature and frequency, at temperatures lower than 400 K, showed two regions with typical characteristics of a relaxor ferroelectric materials. (C) 2002 American Institute of Physics.

引用

页码：2731 / 2733

页数：3

共 14 条

[1]

CROSS LE, 1987, FERROELECTRICS, V76, P241, DOI 10.2109/jcersj.99.829

[2]

JONA F, 1962, FERROELECTRIC CRYSTA, V1, P227

[3] Dense ceramics of NaNbO3 produced from powders prepared by a new chemical route [J].