The influence of sintering process and atmosphere on the non-ohmic properties of SnO2 based varistor

被引：104
作者：
Leite, ER
Nascimento, AM
Bueno, PR
Longo, E
Varela, JA
机构：
[1] Univ Fed Sao Carlos, Dept Quim, BR-13560 Sao Carlos, SP, Brazil
[2] Univ Estadual Paulista, Inst Quim, BR-14800 Araraquara, SP, Brazil
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 1999年 / 10卷 / 04期
基金：
巴西圣保罗研究基金会;
关键词：
D O I：
10.1023/A:1008933004042
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The non-ohmic properties of the 98.95% SnO2 + 1.0 CoO + 0.05 Nb2O5 (all in mole%) system, as well as the influence of sintering temperature and atmosphere on these properties, were characterized in this study. The maximum non-linear coefficient (alpha = 32) was obtained for a sintering temperature of 1300 degrees C in an oxygen atmosphere and this maximum is associated with the presence of O in SnO2 grain boundaries, as interface defects. Experimental results also indicate thermionic-type conduction mechanisms, which are associated with the potential barrier of Schottky or Poole-Frenkel types.
引用
收藏
页码：321 / 327
页数：7
相关论文
共 19 条
[1]  
Cerri JA, 1996, J AM CERAM SOC, V79, P799, DOI 10.1111/j.1151-2916.1996.tb07949.x
[2]   OXYGEN-CHEMISORPTION ON TIN OXIDE - CORRELATION BETWEEN ELECTRICAL-CONDUCTIVITY AND ELECTRON-PARAMAGNETIC-RES MEASUREMENTS [J].
CHANG, SC .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY, 1980, 17 (01) :366-369
[3]  
Eda K., 1989, IEEE Electrical Insulation Magazine, V5, P28, DOI 10.1109/57.44606
[4]  
FAGAN JG, 1993, AM CERAM SOC BULL, V72, P119
[5]   A GRAIN-BOUNDARY DEFECT MODEL FOR INSTABILITY STABILITY OF A ZNO VARISTOR [J].
GUPTA, TK ;
CARLSON, WG .
JOURNAL OF MATERIALS SCIENCE, 1985, 20 (10) :3487-3500
[6]  
HE SY, 1993, J MATER RES, V8, P3131
[7]  
HENNING D, 1983, Patent No. 4417227
[8]  
JARZEBSKI ZM, 1976, J ELECTROCHEM SOC, V123, pC199, DOI [10.1149/1.2132647, 10.1149/1.2133090]
[9]  
JOSS HD, 1975, THESIS U WASHINGTON
[10]   ISOTHERMAL CAPACITANCE TRANSIENT SPECTROSCOPY STUDY ON TRAP LEVELS IN POLYCRYSTALLINE SNO2 CERAMICS [J].
KIM, MC ;
SONG, KH ;
PARK, SJ .
JOURNAL OF MATERIALS RESEARCH, 1993, 8 (06) :1368-1372
12