Effect of Microstructure on Pulse Electrical Strength of MgO

Effect of Microstructure on Pulse Electrical Strength of MgO

Pulse electrical strengths of hot‐pressed MgO containing 0.3 wt% LiF were measured. Strengths as high as 5.9×108 V/in. were obtained on samples 99.8% of theoretical density with 1‐to 3‐μm grain size. An increase of either porosity or grain size resulted in a monotonic decrease in strength. Single‐cr...

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Veröffentlicht in:Journal of the American Ceramic Society 1971-10, Vol.54 (10), p.484-487
1. Verfasser: BEAUCHAMP, E. K.
Format: Artikel
Sprache:eng
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Zusammenfassung:Pulse electrical strengths of hot‐pressed MgO containing 0.3 wt% LiF were measured. Strengths as high as 5.9×108 V/in. were obtained on samples 99.8% of theoretical density with 1‐to 3‐μm grain size. An increase of either porosity or grain size resulted in a monotonic decrease in strength. Single‐crystal strengths of 4.0×106 V/in. were obtained by polishing samples chemically. A simple recessed‐electrode configuration eliminated corona effects.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1971.tb12184.x