Abstract
Abstract Tetrapod-shaped zinc oxide whisker has been prepared with high purity and good yield in a short reaction time using a new method, the gas expanding method, which is the oxidation of pellets or other shaped metallic zinc at 500–800°C and at atmospheric pressure. The results show that this is a practical and economical method for the manufacturing of ZnO whiskers with a peculiar shape of tetrapod. A suitable ratio for the volume of the furnace chamber and the quantity of the metallic zinc has been suggested. The structures of the products were studied by SEM and X-ray diffraction analysis. The microwave absorption of the composites of ZnO whisker/chlorobutadiene rubber has been investigated, and the result indicates that the composites are of excellence with respect to microwave absorption. The results of vibration tests of polyvinyl chloride show that material containing tetrapod-like ZnO whisker appears to have superior damping characteristics.
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