High stability transition metal NZP type phosphates
AssigneeThe Penn State Research Foundation
InventorsSridhar Komarneni, William W. Gould
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Abstract
Transition metal NZP type compounds are synthesized. Examples of these compounds include MnZr4(PO4)6, FeZr4(PO4)6, CoZr4(PO4)6, NiZr4(PO4)6, and CuZr4(PO4)6. These compounds are synthesized by the Xerogel process. These transition metal NZP type compounds can be used as colorants in applications such as ceramic glazes where high thermal stability of the colorant is important.
Claims24
A thermally stable, transition metal NZP type compound having an intrinsic color, the compound capable of imparting the intrinsic color to a ceramic composition comprising the compound, the compound having a formula MxZr4P6O24,
- where M is any of Mn, Fe, Co, or Cu, and
- x is about 0.1 to about 1.2.
A thermally stable, transition metal NZP type compound having an intrinsic color, the compound capable of imparting the intrinsic color to a ceramic composition comprising the compound, the compound having a formula (N1−x Mx)Zr4P6O24, where M and N are different and each is any of Mn, Fe, Co, or Cu, and x is about 0.1 to 1.0.
A modified glaze composition comprising a ceramic glaze composition and a transition metal NZP compound corresponding to any of MxZr4P6O24,
- where M is any of Mn, Fe, Co, Ni, or Cu, and x is about 0.1 to about 1.2, or
- (N1−x Mx)Zr4P6O24 where M and N are different and each is any of Mn, Fe, Co, Ni, or Cu, and x is about 0.1 to 1.0.
A method of manufacture of a transition metal NZP compound corresponding to any of MxZr4P6O24,
- where M is any of Mn, Fe, Co, or Cu, and x is about 0.1 to about 1.2, or
- (N1−x MxZr4P6O24 where M and N are different and each is any of Mn, Fe, Co, or Cu, and x is about 0.1 to 1.0 comprising,
- mixing a transition metal cation solution selected from the group consisting of aqueous metal chlorides, metal nitrates, or mixtures thereof with a zirconium cation solution selected from the group consisting of zirconium oxychloride, zirconium nitrate, and zirconium dioxide, to form a mixed transition metal cation solution,
- reacting the mixed transition metal cation solution with an aqueous phosphate selected from the group consisting of ammonium dihydrogen phosphate, phosphoric acid, and diammonium hydrogen phosphate to precipitate a gel,
- drying the gel to produce a powder,
- and firing the powder to produce a transition metal NZP compound corresponding to the formula MxZr4P6O24.
Dependencies are inferred from the claim text.