Title :
The investigation and relationship between space charges and pre-breakdown of solid dielectrics
Author :
Liu, Richard ; Tu, Dan ; Liu, Zhe
Author_Institution :
Dept. of Electr. Eng., Xi´an Jiaotong Univ.
Abstract :
The electroacoustic pulse method is used to measure the space-charge distribution in solid dielectrics in which the stress waves of interfacial and volume charges overlap. To reduce measurement errors, a polyvinylidene fluoride piezoelectric transducer of wider frequency bandwidth (0.5-10 MHz) is used instead of a lead zirconate-titanate transducer. The processes of injection and accumulation of space charge in low-density polyethylene samples are observed, and the charge distribution and the electric field distribution under high DC electric fields are measured. Experimental results show that space charges play an important role in the breakdown of solid dielectrics
Keywords :
acoustoelectric devices; charge measurement; electric breakdown of solids; organic insulating materials; polymers; space charge; 0.5 to 10 MHz; breakdown; electric field distribution; electroacoustic pulse method; frequency bandwidth; high DC electric fields; interfacial charges; low-density polyethylene; polyvinylidene fluoride piezoelectric transducer; prebreakdown; solid dielectrics; space-charge distribution; stress waves; volume charges; Current measurement; Dielectric measurements; Measurement errors; Piezoelectric transducers; Pulse measurements; Pulsed electroacoustic methods; Solids; Space charge; Stress measurement; Volume measurement;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38412
