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In this study, softwood pulps with Schopper Riegler (SR) freeness of 10 °SR, 17 °SR, 31 °SR, 40 °SR, 48 °SR were used to prepare presspaper samples. Morphological properties of fibers and presspaper were characterized by optical microscope (OM) and scanning electron microscope (SEM). Mechanical and electrical performances of obtained samples were evaluated. Results show that cellulose fibers become...
Space charge has received much attention recently because an understanding of space charge in oil-paper insulation is useful for the design of converter transformers. This paper presents a study of space charge dynamics at the physical interface using the pulsed electroacoustic (PEA) method. After sample inversion, space charge in the vicinity of semiconductor electrode could be clearly observed when...
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