Making Chemically Bonded Phosphate Ceramic

By henry colorado clem hiel h.

Making chemically bonded phosphate ceramic.

Chemically bonded phosphate ceramics are comprised of a mixture of phosphates water metal oxides and minerals. This invention relates to a novel method of decreasing porosity of ceramics produced by sol gel processing. Chemically bonded phosphate ceramics brings together the latest developments in chemically bonded phosphate ceramics cbpcs including several novel ceramics from us federal laboratories such as argonne oak ridge and brookhaven national laboratories as well as russian and ukrainian nuclear institutes. Coupled with further advances in their use as biomaterials these materials have found.

Cbpcs are synthesized by chemical reactions most of them at. Wagh in chemically bonded phosphate ceramics second edition 2016. Such combined sol gel chemical bonding process can be used to fabricate dense thick ceramics or. April 9th 2011 published.

October 19th 2010 reviewed. A chemically bonded phosphate ceramic is a type of coating that is used to protect certain types of metals from corrosion. Phase evolution on heating and mechanical properties cement and concrete. Crossref nora e hipedinger alberto n scian esteban f aglietti magnesia ammonium phosphate bonded cordierite refractory castables.

Wollastonite based chemically bonded phosphate ceramic composites. Chemically bonded phosphate ceramics cbpcs are abcs in which the acid component is orthophosphoric acid or a soluble orthophosphate and the resulting ceramic is an insoluble orthophosphate. Phosphate bonds are found in nature as one of the fundamental blocks of dna structure and in bones and their use in the production of cbpcs for various. Chemically bonded phosphate ceramics cbpcs are the most natural and hence appropriate materials for immobilization of radioactive and mixed waste streams.

Thomas hahn and jenn ming yang. The monovalent alkali metal phosphate or ammonium hydrogen phosphate and sparsely soluble oxide are both in powder form and combined in a stochiometric molar ratio. The process of preparing chemically bonded sol gel ceramics comprises phosphating a sol gel derived oxide or hydrated oxide and polymerizing the phosphated product with heat treatment. Making a chemically bonded phosphate ceramic like ceramicrete using.

An overview of chemically bonded phosphate ceramics cbpcs that fill the gap between cements and conventional ceramics is provided. A chemically bonded phospho silicate ceramic formed by chemically reacting a monovalent alkali metal phosphate or ammonium hydrogen phosphate and a sparsely soluble oxide with a sparsely soluble silicate in an aqueous solution.