Improving surface flashover performance in vacuum through co-firing Mo/Al2O3 cermets and Al2O3 ceramics

被引：0

作者：

Li, Shengtao ^{[1
]}

Zhang, Tuo ^{[1
]}

Sun, Jian ^{[1
]}

Huang, Qifeng ^{[1
]}

机构：

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

来源：

PROCEEDINGS OF THE 2010 IEEE INTERNATIONAL CONFERENCE ON SOLID DIELECTRICS (ICSD 2010) | 2010年

关键词：

surface flashover in vacuum; Mo/Al2O3; cermet; triple junction; electric field; co-fire; ALUMINA INSULATORS; VOLTAGE;

D O I：

暂无

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：

Some insulating structures of Mo/Al2O3 cermet - Al2O3 ceramic - Mo/Al2O3 cermet were prepared to improve surface flashover performance in vacuum through co-firing, where the volume amount of Mo was managed from 2 to 50 vol% and there could exist one or two layers with different Mo amount in Mo/Al2O3 cermet. The influences of Mo amount of Mo/Al2O3 cermet on the surface flashover voltage in vacuum of samples were experimentally investigated, indicating that the surface flashover voltage of three and five-layer structures were improved by 77% and 117%, respectively. Through the electrostatic field simulation, it was found that the improvement is caused by the weakening of the electric field at vacuum-insulator-cathode triple junction.

引用

页数：4

共 10 条

[1] INFLUENCE OF MECHANICAL GRINDING AND POLISHING OPERATIONS OF BRITTLE POLYCRYSTALLINE ALUMINA ON THE PULSED SURFACE FLASHOVER PERFORMANCE [J].

BOMMAKANTI, RG ;

SUDARSHAN, TS .

JOURNAL OF APPLIED PHYSICS, 1990, 67 (11) :6991-6997

[2] Influence of sintering temperature on the flashover performance of alumina insulators in vacuum [J].

Ding, LJ ;

Li, CR ;

Wang, JC ;

Wang, W .

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2002, 9 (02) :182-186

[3] Electrical conductivity of an insulator matrix (alumina) and conductor particle (molybdenum) composites [J].

Hussain, S ;

Barbariol, I ;

Roitti, S ;

Sbaizero, O .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2003, 23 (02) :315-321

[4] Influence of Cr2O3 and MnO additives on the surface properties of alumina insulators [J].

Lei, YJ ;

Xiao, DQ .

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2006, 13 (01) :93-97

[5] DIELECTRIC SURFACE PREFLASHOVER PROCESSES IN VACUUM [J].

LI, CR ;

SUDARSHAN, TS .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (06) :3313-3320

[6] IMPROVING THE VOLTAGE HOLDOFF PERFORMANCE OF ALUMINA INSULATORS IN VACUUM THROUGH QUASI-METALLIZING [J].

MILLER, HC .

IEEE TRANSACTIONS ON ELECTRICAL INSULATION, 1980, 15 (05) :419-428

[7] FLASHOVER OF INSULATORS IN VACUUM - REVIEW OF THE PHENOMENA AND TECHNIQUES TO IMPROVE HOLDOFF VOLTAGE [J].

MILLER, HC .

IEEE TRANSACTIONS ON ELECTRICAL INSULATION, 1993, 28 (04) :512-527

[8] PREBREAKDOWN PROCESSES ASSOCIATED WITH SURFACE FLASHOVER OF SOLID INSULATORS IN VACUUM [J].

SUDARSHAN, TS ;

CROSS, JD ;

SRIVASTAVA, KD .

IEEE TRANSACTIONS ON ELECTRICAL INSULATION, 1977, 12 (03) :200-208

[9] EFFECT OF CHROMIUM OXIDE COATINGS ON SURFACE FLASHOVER OF ALUMINA SPACERS IN VACUUM [J].

SUDARSHAN, TS ;

CROSS, JD .

IEEE TRANSACTIONS ON ELECTRICAL INSULATION, 1976, 11 (01) :32-35

[10] Improving withstand voltage by roughening the surface of an insulating spacer used in vacuum [J].

Yamamoto, O ;

Takuma, T ;

Fukuda, M ;

Nagata, S ;

Sonoda, T .

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2003, 10 (04) :550-556

← 1 →