Rareearth doped modified barium carbonate current rheological liquid and preparation process thereof


Application Number: 00113930
Application Date: 2000.09.25
Publication Number: 1345919
Publication Date: 2002.04.24
Priority Information:
International: C10M113/08
Applicant(s) Name: Xibei Polytechnical Univ.
Address:
Inventor(s) Name: Zhao Xiaopeng;Yin Jianbo
Patent Agency Code: 00000
Patent Agent:
Abstract The present invention provides a current transformed liquid material and its preparation method, in particular, it relates to a kind of doped rare earth modified barium titanate anhydrous current transformed liquid material. Said invention obtained disperse phase material rare earth modified barium titanate is prepared by using barium titanate as matrix substance, using rare earth elements of lanthanum, cerium and iridium as modifier and adopting sol-gel method. It is characterized by using eth8yl alcohol as solvent, using acetic acid as cosolvent and catalyst to implement sol-gel process at 45-55 deg.C. The raw materials are easily available, its matrix component and doped effect are easy to control, and the obtained material possesses stable structure and composition. The adulteration of rare earth can improve dielectric property of barium titanate material to a certain extent, and can make the current transformatino activity or current transformed liquid prepared with it and silicon oil obviously raised under the conditino of D.C. field as compared with pure barium titanate current transformed liquid.