DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Method for the generation of variable density metal vapors which bypasses the liquidus phase

Abstract

The present invention provides a method for producing a metal vapor that includes the steps of combining a metal and graphite in a vessel to form a mixture; heating the mixture to a first temperature in an argon gas atmosphere to form a metal carbide; maintaining the first temperature for a period of time; heating the metal carbide to a second temperature to form a metal vapor; withdrawing the metal vapor and the argon gas from the vessel; and separating the metal vapor from the argon gas. Metal vapors made using this method can be used to produce uniform powders of the metal oxide that have narrow size distribution and high purity.

Inventors:
 [1];  [2]
  1. Stony Brook, NY
  2. Rocky Point, NY
Issue Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
OSTI Identifier:
873519
Patent Number(s):
6179897
Assignee:
Brookhaven Science Associates (Upton, NY)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; generation; variable; density; metal; vapors; bypasses; liquidus; phase; provides; producing; vapor; steps; combining; graphite; vessel; form; mixture; heating; temperature; argon; gas; atmosphere; carbide; maintaining; period; time; withdrawing; separating; produce; uniform; powders; oxide; narrow; size; distribution; purity; narrow size; metal carbide; size distribution; metal vapor; metal oxide; gas atmosphere; variable density; uniform powder; density metal; /75/

Citation Formats

Kunnmann, Walter, and Larese, John Z. Method for the generation of variable density metal vapors which bypasses the liquidus phase. United States: N. p., 2001. Web.
Kunnmann, Walter, & Larese, John Z. Method for the generation of variable density metal vapors which bypasses the liquidus phase. United States.
Kunnmann, Walter, and Larese, John Z. Mon . "Method for the generation of variable density metal vapors which bypasses the liquidus phase". United States. https://www.osti.gov/servlets/purl/873519.
@article{osti_873519,
title = {Method for the generation of variable density metal vapors which bypasses the liquidus phase},
author = {Kunnmann, Walter and Larese, John Z},
abstractNote = {The present invention provides a method for producing a metal vapor that includes the steps of combining a metal and graphite in a vessel to form a mixture; heating the mixture to a first temperature in an argon gas atmosphere to form a metal carbide; maintaining the first temperature for a period of time; heating the metal carbide to a second temperature to form a metal vapor; withdrawing the metal vapor and the argon gas from the vessel; and separating the metal vapor from the argon gas. Metal vapors made using this method can be used to produce uniform powders of the metal oxide that have narrow size distribution and high purity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}