Sol-gel processing of ZnO-coated TiB_2 composite powders

摘要

A sol-gel method for the preparation of ZnO-coated TiB_2 composite powders, using inexpensive zinc acetate, is described. It yields composite powders of TiB_2 particles coated with fine ZnO grains. The composite powders can be hot pressed at relatively low temperature and a 10 vol.%TiB_2-ZnO sample shows much better thermoelectric (TE) properties than pure ZnO ceramic.