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Title: Preparation of tungsten oxide

Abstract

Tungsten trioxide hydrate (WO.sub.3.H.sub.2O) was prepared from a precursor solution of ammonium paratungstate in concentrated aqueous hydrochloric acid. The precursor solution was rapidly added to water, resulting in the crash precipitation of a yellow white powder identified as WO.sub.3.H.sub.2O nanosized platelets by x-ray diffraction and scanning electron microscopy. Annealing of the powder at 200.degree. C. provided cubic phase WO.sub.3 nanopowder, and at 400.degree. C. provided WO.sub.3 nanopowder as a mixture of monoclinic and orthorhombic phases.

Inventors:
 [1];  [2];  [2];  [3];  [3]
  1. Yankton, SD
  2. Los Alamos, NM
  3. Jemez Springs, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
988694
Patent Number(s):
7591984
Application Number:
10/629,489
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Bulian, Christopher J, Dye, Robert C, Son, Steven F, Jorgensen, Betty S, and Perry, W Lee. Preparation of tungsten oxide. United States: N. p., 2009. Web.
Bulian, Christopher J, Dye, Robert C, Son, Steven F, Jorgensen, Betty S, & Perry, W Lee. Preparation of tungsten oxide. United States.
Bulian, Christopher J, Dye, Robert C, Son, Steven F, Jorgensen, Betty S, and Perry, W Lee. Tue . "Preparation of tungsten oxide". United States. https://www.osti.gov/servlets/purl/988694.
@article{osti_988694,
title = {Preparation of tungsten oxide},
author = {Bulian, Christopher J and Dye, Robert C and Son, Steven F and Jorgensen, Betty S and Perry, W Lee},
abstractNote = {Tungsten trioxide hydrate (WO.sub.3.H.sub.2O) was prepared from a precursor solution of ammonium paratungstate in concentrated aqueous hydrochloric acid. The precursor solution was rapidly added to water, resulting in the crash precipitation of a yellow white powder identified as WO.sub.3.H.sub.2O nanosized platelets by x-ray diffraction and scanning electron microscopy. Annealing of the powder at 200.degree. C. provided cubic phase WO.sub.3 nanopowder, and at 400.degree. C. provided WO.sub.3 nanopowder as a mixture of monoclinic and orthorhombic phases.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {9}
}

Works referenced in this record:

The observation of cubic tungsten trioxide at high-temperature dehydration of tungstic acid hydrate
journal, May 2001


H2S response of WO3 thin-film sensors manufactured by silicon processing technology
journal, April 1994


Study of WO3-based sensing materials for NH3 and NO detection
journal, July 2000


Aqueous precursors for electrochromic tungsten oxide hydrates
journal, April 1996


Tungsten Oxide-Based Semiconductor Sensor Highly Sensitive to NO and NO 2
journal, September 1991


Preparation and characterization of pyrolytic spray deposited electrochromic tungsten trioxide films
journal, January 2000


Microstructure and properties of sol-gel deposited WO3 coatings for large area electrochromic windows
journal, May 1993


Synthesis of tungsten trioxide hydrates and their structural properties
journal, August 2000