Process for preparing a barium titanate film

Details Process for preparing a barium titanate film Process for preparing a barium titanate film

1988-05-03

1990-09-25

Group, Karl

Glass manufacturing

Processes

Devitrifying glass or vitrifying crystalline glass

501 10, 501 21, 501 49, 501137, 501139, 4271262, 4271263, 4273762, C03C 1002

Patent

active

049590898

ABSTRACT:
A process for preparing a tetragonal barium titanate film with a thickness of from about 0.1 to about 1.5 millimeters is disclosed.
In the first step of this process, a mixture of a barium compound, a titanium compound, and a boron oxide glass former is provided in a specified ratio.
The reaction mixture is melted at a temperature of 1300-1400 degrees centigrade and then rapidly quenched in form glass. The glass is then place upon a polycrystalline isostructural substrate, and the glass/substrate assembly is then remelted and, thereafter, subjected to a temperature of from 950 to 1,050 degrees centigrade for from about 25 to about 60 minutes.

REFERENCES:
patent: 3000745 (1961-09-01), Cianchi
patent: 3195030 (1965-07-01), Herczog et al.
patent: 3615757 (1971-10-01), Herczog et al.
patent: 3649353 (1972-03-01), Ulrich
patent: 4610971 (1986-09-01), Wada et al.
"An Experimental Study of Barium-Titanate Glass-Ceramics in a Ternary Borate Glass System", Atit Bhargava, Doctoral Thesis submitted to Alfred University, published on or about Mar. 1988.
"Crystallization of Glasses in the System BaO-TiO.sub.2 -B.sub.2 O.sub.3 ", A. Bhargava et al., Journal of Non-Crystalline Solids, vol. 102, pp. 136-142 (Elsevier Science Publishers, N. Holland, Amsterdam, 1988).

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