Alloying and coating process

Details Alloying and coating process Alloying and coating process

1990-09-04

1992-01-28

Pianalto, Bernard

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

75340, 420579, 420580, 427250, 4272557, 427294, 427404, B05D 506

Patent

active

050843010

ABSTRACT:
Disclosed is an alloying process which comprises, in the order stated (1) heating in a reaction vessel a mixture of selenium and tellurium from ambient temperature to form about 270.degree. C. to about 330.degree. C. while maintaining the mixture in a quiescent state; (2) maintaining the mixture at from about 270.degree. C. to about 330.degree. C. until the entire mixture has reached substantial equilibrium with respect to temperature while maintaining the mixture in a quiescent state; (3) subsequently heating the mixture from the range of from about 270.degree. C. to about 330.degree. C. to the range of from about 500.degree. C. to about 580.degree. C. while maintaining the mixture in a quiescent state; (4) maintaining the mixture at from about 500.degree. C. to about 580.degree. C. until the entire mixture has reached substantial equilibrium with respect to temperature while maintaining the mixture in a quiescent state; (5) thereafter maintaining the mixture at from about 500.degree. C. to about 580.degree. C. for from about 0.75 hour to about 1.5 hours while vigorously agitating the mixture; (6) subsequent to agitation, reducing the temperature of the mixture from the range of from about 500.degree. C. to about 580.degree. C. to the range of from about 425.degree. C. to about 450.degree. C. while maintaining the mixture in a quiescent state; (7) subsequently maintaining the temperature of the mixture at from about 425.degree. C. to about 450.degree. C. for from about 4 hours to about 7 hours while maintaining the mixture in a quiescent state; (8) reducing the temperature of the mixture from the range of from about 425.degree. C. to about 450.degree. C. to the range of from about 290.degree. C. to about 350.degree. C. while maintaining the mixture in a quiescent state; and (9) removing the mixture from the reaction vessel. Also disclosed is a process for preparing an imaging member which comprises preparing a selenium-tellurium alloy by the above process and vacuum evaporating the alloy onto a substrate.

REFERENCES:
patent: 3723105 (1973-03-01), Kitajima et al.
patent: 3785806 (1974-01-01), Henriksson
patent: 4414179 (1983-09-01), Robinette
patent: 4484945 (1984-11-01), Badesta et al.
patent: 4583608 (1986-04-01), Field et al.
patent: 4822712 (1989-04-01), Foley et al.

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