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Effect of Microstructure on Pulse Electrical Strength of MgO
Author(s) -
BEAUCHAMP E. K.
Publication year - 1971
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1971.tb12184.x
Subject(s) - microstructure , materials science , grain size , polishing , porosity , electrode , composite material , pulse (music) , crystal (programming language) , analytical chemistry (journal) , optics , chemistry , physics , detector , chromatography , computer science , programming language
Pulse electrical strengths of hot‐pressed MgO containing 0.3 wt% LiF were measured. Strengths as high as 5.9×10 8 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 4.0×10 6 V/in. were obtained by polishing samples chemically. A simple recessed‐electrode configuration eliminated corona effects.