The rutile Ti O2 is often used as dielectric constant regulator in the preparation of high frequency and microwave substrate materials for its high dielectric constant. The direct use of micron grade Ti O2 will lead to the waste of titanium resources. In this thesis, the Ba SO4/rutile Ti O2 composite particles were synthesized by thermal hydrolysis method under low calcination temperature using Ti C l4 as raw material and Ba SO4 as core, which maximized the utilization of resources. This method has the adva...