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Industrial applications of space charge measurement using the pulsed electroacoustic (PEA) method were introduced. The materials are not only insulating materials affected by internal charges but also new functional polymers that effectively use internal charges. Users of the space charge measurement have had the method advanced to obtain suitable experimental conditions for a variety of materials. The space charge research field has been continuously expanding in Japan, and there are still many prospective materials for space charge measurement specimens.
Date of Publication: Sept.-Oct. 1999