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A POWDER TREATMENT PROCESS TO CONTROL ALLOY FRACTIONATION

IP.com Disclosure Number: IPCOM000026623D
Original Publication Date: 1992-Dec-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 73K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed are processes for treating selenium alloys which: control the relative quantity of tellurium and/or arsenic formed in the top surface layer of vacuum deposited selenium alloys containing tellurium and/or arsenic; reduce the tellurium and/or arsenic distribution variation through the thickness of a photoconductive layer of an alloy of selenium with tellurium and/or arsenic; limit the loss of selenium rich species early in the evaporation process; control the sensitivity of photoreceptors to light within narrower limits; produce evaporated films of selenium and its alloys with arsenic and/or tellurium which have superior photoconductive properties; control the electrical cycling characteristics within narrower limits; control the mechanical wear characteristics of the photoreceptor surface within narrower limits; produce photoconducting devices which provide improved image quality when used in electrophotographic applications; and provide improved processes for preparing photoreceptors comprising selenium alloys containing additives such as tellurium and/or arsenic.

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XEROX DISCLOSURE JOURNAL

A POWDER TREATMENT Proposed Classification PROCESS TO CONTROL ALLOY
FRACTIONATION Int. C1. G03g 05/00 Lawrence E. Kowalczyk
Barry A. Lees
Monroe J. Hordon
Paul F. Zukoski

US. C1.4301059

Disclosed are processes for treating selenium alloys which: control the relative quantity of tellurium and/or arsenic formed in the top surface layer of vacuum deposited selenium alloys containing tellurium and/or arsenic; reduce the tellurium and/or arsenic distribution variation through the thickness of a photoconductive layer of an alloy of selenium with tellurium and/or arsenic; limit the loss of selenium rich species early in the evaporation process; control the sensitivity of photoreceptors to light within narrower limits; produce evaporated films of selenium and its alloys with arsenic and/or tellurium which have superior photoconductive properties; control the electrical cycling characteristics within narrower limits; control the mechanical wear characteristics of the photoreceptor surface within narrower limits; produce photoconducting devices which provide improved image quality when used in electrophotographic applications; and provide improved processes for preparing photoreceptors comprising selenium alloys containing additives such as tellurium and/or arsenic.

The process comprises providing an alloy of selenium, preparing powdered particles of the alloy with an average particle diameter of less than 300 microns, placing the powdered particle...