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US 2014/0349831 A1Published application
Alumina-rich glasses and methods for making the same
AssigneeColorado School of Mines
InventorsIvan A. Cornejo, Ivar E. Reimanis
Life of this patent
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Abstract
The invention relates to new glass formulations with alumina contents greater than 35 mol % and methods for making these glasses. The glass may be a porous glass or a dense glass.
Claims20
A method for producing a porous high alumina content glass, comprising:
- mixing greater than about 20 mol % alumina and between about 30 mol % to about 80 mol % of an oxide to produce a mixture;
- heat treating the mixture to produce a phase separated material comprising an alumina-rich phase and an alumina-lean phase;
- cooling the phase separated material;
- and
- leaching the alumina-lean phase from the phase separated material to produce the porous high alumina content glass.
2 more elements
A porous high alumina content glass comprising:
- greater than about 20 mol % alumina;
- and
- an oxide.
A method to form a high content alumina glass, comprising:
- mixing an alumina powder and an oxide powder to form a mixture, wherein the alumina powder comprises at least about 20 mol % of the mixture and wherein the oxide comprises at least about 30 mol % of the mixture;
- calcining the mixture to form a calcined mixture;
- melting the calcined mixture to form a melt;
- quenching the melt to form a quenched material;
- annealing the quenched material to form an annealed material;
- nucleating the annealed material to form a material;
- phase separating the material to form a separated material comprising an alumina-rich phase and an alumina-lean phase;
- and
- leaching the separated material to leach the alumina-lean phase to produce a high content alumina glass.
6 more elements
Dependencies are inferred from the claim text.