Space Charge Distribution for Various Glass Materials under DC Stress

Abstract

Space charge accumulation for various glass materials under DC stress was studied by using a pulse electro-acoustic (PEA) method. We should make an acoustic matching between the sample and electrode of high voltage side when the hetero-space charge distribution in glass materials is measured. Because the acoustic pressure waves generated from the induced charge at high voltage side is cancelled by the reflected one generated from hetero-charge in accumulated in sample. The big hetero-charge are observed in the glass materials contained MgO and CaO compound to compare to the quartz glass contained no-compound.