Process for producing fine particles of bismuth titanate

Details Process for producing fine particles of bismuth titanate Process for producing fine particles of bismuth titanate

2007-11-27

2007-11-27

Estrada, Michelle (Department: 2823)

Semiconductor device manufacturing: process

Having magnetic or ferroelectric component

C438S584000, C977S775000, C977S776000, C977S900000

Reexamination Certificate

active

11223984

ABSTRACT:
It is an object to provide fine particles of bismuth titanate having excellent dielectric characteristics, high crystallinity and a small particle diameter, and a process for their production. The object is accomplished by a process which comprises a step of obtaining a melt comprising, as represented by mol % based on oxides, from 23 to 72% of Bi2O3, from 4 to 64% of TiO2and from 6 to 50% of B2O3, a step of quickly quenching this melt to obtain an amorphous material, a step of crystallization of bismuth titanate crystals from the above amorphous material, and a step of separating the bismuth titanate crystals from the obtained crystallized material, in this order.

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