Method for preparing PLZT, PZT and PLT sol-gels and fabricating

Details Method for preparing PLZT, PZT and PLT sol-gels and fabricating Method for preparing PLZT, PZT and PLT sol-gels and fabricating

1990-12-19

1992-05-26

Bell, Janyce

Coating processes

Electrical product produced

Metallic compound coating

252 629, 427 79, 427 96, 427100, 427108, 427162, 427163, 427165, 427226, 427240, 427294, 4273762, 427231, 427234, B05D 512

Patent

active

051166437

ABSTRACT:
A method to produce thin films suitable for fabricating ferroelectric thin films. The method provides for selection of the predetermined amounts of lead, lanthanum, zirconium, and titanium precursors which are soluble in different solvents. Dissolving predetermined amounts of the precursors in their respective solvents in proportions such that hydrolyze reaction rate for each metal precursor will be approximately equal. Preferably, the reaction is performed under an inert atmosphere at from about 350 mmHg to 650 mmHg pressure. The precursors and solvents are mixed, and water is added to begin a hydrolysis reaction. After the hydrolysis the solution is heated to drive off the excess water and solvent to promote the formation of a sol-gel. The sol-gel is then applied to a thin substrate and sintered to produce the ferroelectric film.

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