Phyllosilicate treatment
AssigneeCorning Glass Works
InventorHermann L. Rittler
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Abstract
There is disclosed a natural phyllosilicate and, in solid solution therewith, at least one additional silicate or spinel phase such as beta-quartz, beta-spodumene, biotite, donathite, magnetite and Ca.sub.2 MgFe.sub.2 O.sub.6. There is also disclosed a method of producing such solid solution by introducing a phyllosilicate into a salt bath to effect an ion exchange between the salt of the bath and the phyllosilicate and subjecting the ion-exchanged phyllosilicate to a thermal treatment to develop a new phase which forms a solid solution.
Claims8
A ceramic material consisting essentially of at least one solid solution, said one solid solution being composed of at least two crystal phases, one being a phyllosilicate crystal phase and a second being a crystal phase selected from the group consisting of a silicate and a spinel.
A method of chemically altering a phyllosilicate to produce a ceramic material consisting essentially of at least one solid solution, said one solid solution being composed of at least two crystal phases, one being a phyllosilicate crystal phase and a second being a crystal phase selected from the group consisting of a silicate and a spinel which comprises introducing the phyllosilicate into a source of cations exchangeable with the interlayer cations present in the phyllosilicate, said source of exchangeable cations being selected from the group consisting of an aqueous solution and a molten salt bath operating at a temperature of 100.degree.-900.degree. C., to effect an ion exchange between the source of exchangeable cations and the interlayer cations of the phyllosilicate, and either simultaneously or subsequently subjecting the ion-exchanged phyllosilicate to a thermal treatment at a temperature above 200.degree. C. to produce said one solid solution.
Dependencies are inferred from the claim text.