Bi4Ti3O12 FERROELECTRIC AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a Bi4Ti3O12 ferroelectric for a dense sintered compact by a simple process. ;SOLUTION: The designated amounts of TiO2 powder and Bi2O3 powder as raw materials are weighed, blended to obtain calcined powder, which is then compacted. The compacted body is filled in a carbon die together with reduction preventing powder, which is then sintered while plasma is discharged by a constant heating speed sintering method to sinter a sample by heating to 800-1,000°C at a constant speed under pressure and holding for a prescribed time or a constant electric current sintering method to sinter a sample while supplying a constant electric current under pressure until 800-900°C to produce the sintered compact having 95% relative density with good reproducibility.;COPYRIGHT: (C)2000,JPO