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

Title: Method for the preparation of photochromic insulating crystals

Abstract

A method for preparing reversible-photochromic magnesium oxide (MgO) crystals. Single crystals of MgO doped with both lithium (Li) and nickel (Ni) are grown by a conventional arc fusion method. The as-grown crystals are characterized by an amber coloration. The crystals lose the amber coloration and become photochromic when they are thermochemically reduced by heating at temperatures greater than 1000.degree. K. in a hydrogen atmosphere. Alternate irradiation with UV and visible light result in rejuvenation and bleaching of the amber coloration, respectively.

Inventors:
 [1];  [2];  [1];  [3]
+ Show Inventor Affiliations
  1. Oak Ridge, TN
  2. Mexico City, MX
  3. Zaragosa, ES
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
865774
Patent Number(s):
4572618
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C30 - CRYSTAL GROWTH C30B - SINGLE-CRYSTAL-GROWTH
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
Show more
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; preparation; photochromic; insulating; crystals; preparing; reversible-photochromic; magnesium; oxide; mgo; single; doped; lithium; nickel; grown; conventional; fusion; as-grown; characterized; amber; coloration; lose; thermochemically; reduced; heating; temperatures; 1000; degree; hydrogen; atmosphere; alternate; irradiation; visible; light; result; rejuvenation; bleaching; respectively; chemically reduce; visible light; single crystal; single crystals; magnesium oxide; hydrogen atmosphere; fusion method; chemically reduced; /359/117/423/501/

Citation Formats

Abraham, Marvin M, Boldu, Jose L, Chen, Yok, and Orera, Victor M. Method for the preparation of photochromic insulating crystals. United States: N. p., 1986. Web.
Copy to clipboard
Abraham, Marvin M, Boldu, Jose L, Chen, Yok, & Orera, Victor M. Method for the preparation of photochromic insulating crystals. United States.
Copy to clipboard
Abraham, Marvin M, Boldu, Jose L, Chen, Yok, and Orera, Victor M. Wed . "Method for the preparation of photochromic insulating crystals". United States. https://www.osti.gov/servlets/purl/865774.
Copy to clipboard
@article{osti_865774,
title = {Method for the preparation of photochromic insulating crystals},
author = {Abraham, Marvin M and Boldu, Jose L and Chen, Yok and Orera, Victor M},
abstractNote = {A method for preparing reversible-photochromic magnesium oxide (MgO) crystals. Single crystals of MgO doped with both lithium (Li) and nickel (Ni) are grown by a conventional arc fusion method. The as-grown crystals are characterized by an amber coloration. The crystals lose the amber coloration and become photochromic when they are thermochemically reduced by heating at temperatures greater than 1000.degree. K. in a hydrogen atmosphere. Alternate irradiation with UV and visible light result in rejuvenation and bleaching of the amber coloration, respectively.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}
Copy to clipboard
Patent:
View Patent
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Similar Records in DOE Patents and OSTI.GOV collections: