Voltage Ageing Of Zinc Oxide Ceramics
It is used as an additive in numerous materials and products including cosmetics food supplements rubbers plastics ceramics glass cement lubricants paints ointments adhesives sealants pigments foods batteries ferrites fire retardants and first aid tapes.
Voltage ageing of zinc oxide ceramics. Those which exhibit a degradation in air and still a more significant degradation in sf6 or oil and those which do not show any visible degradation. Zinc oxide zno varistor ceramics consisting of zno with small amounts of additives such as bi 2 o 3 sb 2 o 3 coo cr 2 o 3 and mn 2 o 3 exhibit excellent nonlinear current voltage i v characteristics and large surge absorption capability thus they are widely employed for overvoltage protection in power systems and electronic devices 1 2. Two classes of blocks are identified. The nonlinear electrical properties and stability against dc accelerated aging stress of various varistors which are composed of zno pr6o11 coo cr2o3 dy2o3 zpccd based ceramics was.
The study of a c. Voltage ageing in various fluids air sf6 transformer oil of zinc oxide based ceramics for hv and ehv surge arresters enabled the following points to be elucidated. Zinc oxide is an inorganic compound with the formula zn o zno is a white powder that is insoluble in water. Voltage ageing of zinc oxide ceramics ieee transactions on power delivery vol.