Inventors:
Alexander G. Anshits - Krasnoyarsk, RU
Olga M. Sharonova - Krasnoyarsk, RU
Tatiana A. Vereshchagina - Krasnoyarsk, RU
Irina D. Zykova - Krasnoyarsk, RU
Yurii A. Revenko - Krasnoyarsk Region, RU
Alexander A. Tretyakov - Krasnoyarsk Region, RU
Albert S. Aloy - Saint-Petersburg, RU
Rem I. Lubtsev - Saint-Petersburg, RU
Dieter A. Knecht - Idaho Falls ID
Troy J. Tranter - Idaho Falls ID
Yevgeny Macheret - Idaho Falls ID
Assignee:
The United States of America as represented by the United States Department of Energy - Washington DC
International Classification:
C04B 3808
US Classification:
501 80, 501155, 264 43, 264628, 264669, 264125
Abstract:
An open-cell glass crystalline porous material made from hollow microspheres which are cenospheres obtained from fly ash, having an open-cell porosity of up to 90 vol. % is produced. The cenospheres are separated into fractions based on one or more of grain size, density, magnetic or non-magnetic, and perforated or non-perforated. Selected fractions are molded and agglomerated by sintering with a binder at a temperature below the softening temperature, or without a binder at a temperature about, or above, the softening temperature but below the temperature of liquidity. The porous material produced has an apparent density of 0. 3-0. 6 g/cm , a compressive strength in the range of 1. 2-3. 5 MPa, and two types of openings: through-flow wall pores in the cenospheres of 0. 1-30 micrometers, and interglobular voids between the cenospheres of 20-100 micrometers. The porous material of the invention has properties useful as porous matrices for immobilization of liquid radioactive waste, heat-resistant traps and filters, supports for catalysts, adsorbents and ion-exchangers.