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Title: Microwave sintering of nanophase ceramics without concomitant grain growth

Abstract

A method of sintering nanocrystalline material is disclosed wherein the nanocrystalline material is microwaved to heat the material to a temperature less than about 70% of the melting point of the nanocrystalline material expressed in degrees K. This method produces sintered nanocrystalline material having a density greater than about 95% of theoretical and an average grain size not more than about 3 times the average grain size of the nanocrystalline material before sintering. Rutile TiO.sub.2 as well as various other ceramics have been prepared. Grain growth of as little as 1.67 times has resulted with densities of about 90% of theoretical.

Inventors:
 [1];  [2];  [3]
  1. (Woodbridge, IL)
  2. (Santa Cruz, NM)
  3. (Los Alamos, NM)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
868828
Patent Number(s):
5223186
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
microwave; sintering; nanophase; ceramics; concomitant; grain; growth; method; nanocrystalline; material; disclosed; microwaved; heat; temperature; 70; melting; expressed; degrees; produces; sintered; density; 95; theoretical; average; size; times; rutile; various; prepared; 67; resulted; densities; 90; nanocrystalline material; average grain; crystalline material; microwave sintering; grain size; grain growth; method produces; nanophase ceramics; phase ceramic; nanophase ceramic; method produce; /264/

Citation Formats

Eastman, Jeffrey A., Sickafus, Kurt E., and Katz, Joel D. Microwave sintering of nanophase ceramics without concomitant grain growth. United States: N. p., 1993. Web.
Eastman, Jeffrey A., Sickafus, Kurt E., & Katz, Joel D. Microwave sintering of nanophase ceramics without concomitant grain growth. United States.
Eastman, Jeffrey A., Sickafus, Kurt E., and Katz, Joel D. Fri . "Microwave sintering of nanophase ceramics without concomitant grain growth". United States. https://www.osti.gov/servlets/purl/868828.
@article{osti_868828,
title = {Microwave sintering of nanophase ceramics without concomitant grain growth},
author = {Eastman, Jeffrey A. and Sickafus, Kurt E. and Katz, Joel D.},
abstractNote = {A method of sintering nanocrystalline material is disclosed wherein the nanocrystalline material is microwaved to heat the material to a temperature less than about 70% of the melting point of the nanocrystalline material expressed in degrees K. This method produces sintered nanocrystalline material having a density greater than about 95% of theoretical and an average grain size not more than about 3 times the average grain size of the nanocrystalline material before sintering. Rutile TiO.sub.2 as well as various other ceramics have been prepared. Grain growth of as little as 1.67 times has resulted with densities of about 90% of theoretical.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

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