RAPID SINTERING OF STOICHIOMETRIC ZINC-MODIFIED LEAD MAGNESIUM NIOBATE

被引:26
作者
LANDIN, SM
SCHULZE, WA
机构
[1] New York State College of Ceramics, Alfred University, Alfred, New York
关键词
electrical ceramics; lead; magnesium; niobates; sintering;
D O I
10.1111/j.1151-2916.1990.tb05135.x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A rapid thermal‐processing technique was used to densify zinc‐modified lead magnesium niobate (PMZN30) of the form Pb(Mg0.7Zn0.3)1/3Nb2/3O3. This dielectric composition showed relaxor behavior with a maximum permittivity near room temperature. Rapid densification was observed at temperature. Rapid densification was observed at temperatures of 1100°C and above, whereas lower temperatures showed a significant reduction of densification and electrical properties. A sintering schedule of 4 min at 1100°C with no prevention of PbO volatilization resulted in densification on the order of 90% of theoretical density and a weak field dielectric constant in excess of 14 000. Perovskite grain size was consistently in the range of 1 μm or less. The formation of pyrochlore on sample surfaces showed a direct relation to time and temperature. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码:913 / 918
页数:6
相关论文
共 16 条
[1]  
Brook R.J., 1982, P BR CERAM SOC, V32, P7
[2]  
CROSS LE, 1987, FERROELECTRICS, V76, P241, DOI 10.2109/jcersj.99.829
[3]  
FOX BH, 1985, AM CERAM SOC BULL, V64, P1141
[4]  
HARMER MP, 1981, J BR CERAM SOC, V80, P147
[5]  
HSU WD, 1987, THESIS ALFRED U ALFR
[6]  
MOSTAGHACI H, 1983, BRIT CERAM TRANS J, V82, P167
[7]  
NEWNHAM RE, 1983, J MATER EDUC, V5, P947
[8]   DIELECTRIC-PROPERTIES OF PYROCHLORE LEAD MAGNESIUM NIOBATE [J].
SHROUT, TR ;
SWARTZ, SL .
MATERIALS RESEARCH BULLETIN, 1983, 18 (06) :663-667
[9]  
SHROUT TR, 1987, AM CERAM SOC BULL, V66, P704
[10]  
SHROUT TR, 1987, JUL C PROC EL CER AL