Effects of Cr2O3 Addition on Microstructure and Vacuum Flashover Performance of Glass-ceramics

被引：6

作者：

Zhang, Hao ^{[1
]}

Xu, Yan ^{[1
]}

Qiao, Guanjun ^{[1
]}

Ma, Dongdong ^{[2
]}

Jin, Haiyun ^{[2
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Sch Mat Sci & Engn, Xian 710049, Shaanxi, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China

来源：

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2014年 / 21卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Flashover; glass-ceramic; chromium oxide; vacuum insulation; SURFACE-PROPERTIES;

D O I：

10.1109/TDEI.2014.004296

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：

K2O-MgO-SiO2-Al2O3-B2O3-F/Cr2O3 glass-ceramics with higher flashover voltage were fabricated by sintering method. The electrical properties were measured, it was found that the flashover voltage was improved obviously with addition of small amount of Cr2O3. The crystalline phases were identified by XRD and the microstructures were observed by SEM and BSE, the results showed that, there were Cr2O3 "islands" existed on the surface of ceramics. These "islands" could absorb the secondary electron and form the secondary electron "black hole". The electric field distribution on surface was also simulated based on BSE and SEM results by ANSYS, it was showed that the Cr2O3 "islands" also distorted the surface electrical field. Therefore, the flashover voltage was increased. When adding with 3wt% Cr2O3, the hold-off voltage of glass-ceramics reached to 57 kV cm(-1) (improved by 45%).

引用

页码：1882 / 1886

页数：5

共 17 条

[1] Effects of manganese and chromium doping on the surface properties of alumina insulators
Lei, Y. J.
Xiao, D. Q.
[J]. JOURNAL OF ELECTROCERAMICS, 2008, 21 (1-4) : 214 - 217
[2] Influence of Cr2O3 and MnO additives on the surface properties of alumina insulators
Lei, YJ
Xiao, DQ
[J]. IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2006, 13 (01) : 93 - 97
[3] Defects and dc electrical degradation in CaCu3Ti4O12 ceramics: Role of oxygen vacancy migration
Li, Jianying
Zhao, Xuetong
Gu, Fang
Li, Shengtao
[J]. APPLIED PHYSICS LETTERS, 2012, 100 (20)
[4] Li S., 2010, 10 IEEE INT C SOL DI, P1
[5] Li ST, 2009, ICPADM 2009: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE ON PROPERTIES AND APPLICATIONS OF DIELECTRIC MATERIALS, VOLS 1-3, P659, DOI 10.1109/ICPADM.2009.5252345
[6] Melt-casting of Si-Al-Y-O glasses and glass-ceramics by combustion synthesis under high gravity
Liu, Guanghua
Li, Jiangtao
He, Bin
[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 2011, 357 (07) : 1764 - 1767
[7] Liu GQ, 2008, INT SYM DISCH ELECTR, P595
[8] Lyu J.Z., 2003, THESIS N CHINA ELECT
[9] Influence of B2O3 on Crystallization Behavior and Microstructure of Mica Glass-Ceramics in the System BaO•4MgO•Al2O3•6SiO2•2MgF2
Mallik, Amit
Maiti, Prabir Kumar
Kundu, Paritosh
Basumajumdar, Arunabha
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2012, 95 (11) : 3505 - 3508
[10] SURFACE FLASHOVER OF INSULATORS
MILLER, HC
[J]. IEEE TRANSACTIONS ON ELECTRICAL INSULATION, 1989, 24 (05): : 765 - 786

← 1 2 →