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Synthetic Mica Investigations: IV, Dielectric Properties of Hot‐Pressed Synthetic Mica and Other Ceramics at Temperatures up to 400°C.
Author(s) -
COMEFORO J. E.,
HATCH R. A.
Publication year - 1954
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.1151-2916.1954.tb14045.x
Subject(s) - mica , dielectric , materials science , ceramic , composite material , electrical resistivity and conductivity , insulator (electricity) , mineralogy , electrical engineering , optoelectronics , chemistry , engineering
The dielectric properties of hot‐pressed synthetic mica were studied in comparison with those of other ceramic insulating materials with special attention to the variation of these properties with temperatures up to 400° C. Power‐factor and dielectric‐constant measurements were made at 1 mc., and the volume resistivity was determined on a d.‐c. resistance bridge with a voltage of 22.5. The comparison revealed the importance of evaluating the electrical properties of a dielectric material at the temperature at which the insulator is expected to operate. A plot of the power‐factor data against the reciprocal of the absolute temperature did not permit the results to be represonted by two intersecting straight lines, as has been previously reported.