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
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
收藏
页码:2731 / 2733
页数:3
相关论文
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].
Lanfredi, S ;
Dessemond, L ;
Rodrigues, ACM .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2000, 20 (07) :983-990
[4]   7 PHASES OF SODIUM NIOBATE [J].
MEGAW, HD .
FERROELECTRICS, 1974, 7 (1-4) :87-89
[5]   Impedance spectroscopy analysis of high-temperature phase transitions in sodium lithium niobate ceramics [J].
Nobre, MAL ;
Lanfredi, S .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (35) :7833-7841
[6]   New evidence of grain boundary phenomenon in Zn7Sb2O12 ceramic:: an analysis by impedance spectroscopy [J].
Nobre, MAL ;
Lanfredi, S .
MATERIALS LETTERS, 2001, 50 (5-6) :322-327
[7]   Dielectric properties of Bi3Zn2Sb3O14 ceramics at high temperature [J].
Nobre, MAL ;
Lanfredi, S .
MATERIALS LETTERS, 2001, 47 (06) :362-366
[8]   Phase transition in sodium lithium niobate polycrystal: an overview based on impedance spectroscopy [J].
Nobre, MAL ;
Lanfredi, S .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2001, 62 (11) :1999-2006
[9]   Temperature behaviour of structural, dielectric and piezoelectric properties of sol-gel processed ceramics of the system LiNbO3-NaNbO3 [J].
Pardo, L ;
DuranMartin, P ;
Mercurio, JP ;
Nibou, L ;
Jiminez, B .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1997, 58 (09) :1335-1339
[10]   Piezoelectricity in NaNbO3 ceramics [J].
Reznitchenko, LA ;
Turik, AV ;
Kuznetsova, EM ;
Sakhnenko, VP .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (17) :3875-3881