Production of ceramic, glass ceramic and other mineral materials and composite materials

Abstract

An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of <100 nm and at least one solvent. The inorganic compounds are preferably compounds selected from the group consisting of the chalcogenides, the carbides and/or the nitrides. Further preference is given to the mean particle size being <50 nm, in particular <25 nm. The solvent is, in particular, a polar solvent, especially water.

1 - 22 . (canceled) 
     
     
         23 . Method for the production of inorganic shaped bodies and coatings, wherein
 a composition is prepared by mixing a binder comprising at least one inorganic compound having a mean particle size <100 nm and at least one suspension medium with coarser particles or fibers having a size larger than the particles in the binder,   the composition is applied onto a substrate or transferred into a form to obtain a green (unsintered) layer or body,   the green layer or the green body is sintered.   
     
     
         24 . Method according to  claim 23 , wherein the binder is present in the composition in an amount, based on the total weight of the composition, of from 1% by weight to 40% by weight. 
     
     
         25 . Method according to  claim 23 , wherein the binder is present in the composition in an amount, based on the total weight of the composition, of from 5% by weight to 20% by weight. 
     
     
         26 . Method according to  claim 23 , wherein the at least one suspension medium is present in the binder in an amount, based on the total weight of the binder, of from 40% by weight to 95% by weight. 
     
     
         27 . Method according to  claim 23 , wherein the at least one suspension medium is present in the binder in an amount, based on the total weight of the binder, of from 50% by weight to 80% by weight. 
     
     
         28 . Method according to  claim 23 , wherein the at least one inorganic compound having a mean particle size <100 nm is present in the composition in an amount, based on the total weight of the composition, of from 1,5% by weight to 15% by weight. 
     
     
         29 . Method according to  claim 23 , wherein the at least one inorganic compound having a mean particle size <100 nm is present in the composition in an amount, based on the total weight of the composition, of from 5% by weight to 10% by weight. 
     
     
         30 . Method according to  claim 23 , wherein the green layer or the green body is sintered at a temperature lower than the sintering-temperature of the coarser particles or fibers. 
     
     
         31 . Method according to  claim 23 , wherein the green layer or the green body is sintered at a temperature at which essentially no shrinkage occurs. 
     
     
         32 . Method according to  claim 23 , wherein inorganic shaped bodies and coatings with an open-pored structure are obtained after sintering. 
     
     
         33 . Method according to  claim 23 , wherein the at least one inorganic compound has a mean particle size <50 nm. 
     
     
         34 . Method according to  claim 23 , wherein the coarser particles or fibers in the composition are micron scaled particles or fibres. 
     
     
         35 . Method according to  claim 23 , wherein the coarser particles or fibers in the composition have sizes in the range from 500 nm and 500 μm. 
     
     
         36 . Method according to  claim 23 , wherein the at least one inorganic compound is chemically neutral with respect to the coarser particles. 
     
     
         37 . Method according to  claim 23 , wherein the at least one inorganic compound is chemically neutral with respect to water. 
     
     
         38 . Method according to  claim 23 , wherein the at least one inorganic compound contained in the binder is selected from the group consisting of chalcogenides, carbides and/or nitrides. 
     
     
         39 . Method according to  claim 23 , wherein the coarser particles or fibers are chalcogenide particles or fibres, carbide particles or fibres, nitride particles or fibres or mixtures thereof. 
     
     
         40 . Method according to  claim 23 , wherein the at least one suspension medium is a polar suspension medium. 
     
     
         41 . Method according to  claim 23 , wherein the at least one suspension medium is water. 
     
     
         42 . Method according to  claim 23 , wherein the coarser particles comprise at least one zeolite. 
     
     
         43 . Inorganic shaped body or coating, obtained by a method according to  claim 23 . 
     
     
         44 . Body or coating according to  claim 42 , wherein it has an open-pored structure.