METHOD FOR PRODUCING PARTICLES, PARTICLES, AND SINTERED BODY
PROBLEM TO BE SOLVED: To provide a particle production method whereby spherical fine particles of a crystalline calcium phosphate-based compound can be efficiently produced at low cost, fine particles (especially, spherical particles) with good flowability produced by the particle production method,...
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| creator | KOBAYASHI SHINTARO YUGAI KAZUHIRO |
| description | PROBLEM TO BE SOLVED: To provide a particle production method whereby spherical fine particles of a crystalline calcium phosphate-based compound can be efficiently produced at low cost, fine particles (especially, spherical particles) with good flowability produced by the particle production method, and a high-quality sintered body obtained by sintering a molded body of the particles. SOLUTION: The particle production method comprises a first step of mixing a first substance containing phosphorus and a second substance containing calcium so that the phosphorus and the calcium are present in a predetermined mole ratio and feeding, into a heated atmosphere, droplets of slurry containing an amorphous reaction product, obtained by the reaction between the first substance and the second substance, to bring the reaction product into a gaseous state; and a second step of crystallizing the reaction product in the gaseous state to obtain particles mainly composed of a calcium phosphate-based compound containing phosphorus and calcium in the predetermined mole ratio. The heated atmosphere preferably contains plasma produced by ionization of an ambient gas. COPYRIGHT: (C)2007,JPO&INPIT |
| format | Patent |
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SOLUTION: The particle production method comprises a first step of mixing a first substance containing phosphorus and a second substance containing calcium so that the phosphorus and the calcium are present in a predetermined mole ratio and feeding, into a heated atmosphere, droplets of slurry containing an amorphous reaction product, obtained by the reaction between the first substance and the second substance, to bring the reaction product into a gaseous state; and a second step of crystallizing the reaction product in the gaseous state to obtain particles mainly composed of a calcium phosphate-based compound containing phosphorus and calcium in the predetermined mole ratio. The heated atmosphere preferably contains plasma produced by ionization of an ambient gas. 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SOLUTION: The particle production method comprises a first step of mixing a first substance containing phosphorus and a second substance containing calcium so that the phosphorus and the calcium are present in a predetermined mole ratio and feeding, into a heated atmosphere, droplets of slurry containing an amorphous reaction product, obtained by the reaction between the first substance and the second substance, to bring the reaction product into a gaseous state; and a second step of crystallizing the reaction product in the gaseous state to obtain particles mainly composed of a calcium phosphate-based compound containing phosphorus and calcium in the predetermined mole ratio. The heated atmosphere preferably contains plasma produced by ionization of an ambient gas. COPYRIGHT: (C)2007,JPO&INPIT</description><subject>ARTIFICIAL STONE</subject><subject>CEMENTS</subject><subject>CERAMICS</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS</subject><subject>COMPOUNDS THEREOF</subject><subject>CONCRETE</subject><subject>HUMAN NECESSITIES</subject><subject>HYGIENE</subject><subject>INORGANIC CHEMISTRY</subject><subject>LIME, MAGNESIA</subject><subject>MEDICAL OR VETERINARY SCIENCE</subject><subject>METALLURGY</subject><subject>NON-METALLIC ELEMENTS</subject><subject>PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES</subject><subject>REFRACTORIES</subject><subject>SLAG</subject><subject>TREATMENT OF NATURAL STONE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2007</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLDxdQ3x8HdRcPMPUggI8ncJdfb0c1cIcAwK8XT2cQ3WQWY6-rkoBHv6hbgGubooOPm7RPIwsKYl5hSn8kJpbgYlN9cQZw_d1IL8-NTigsTk1LzUknivACMDA3MgNDI0dDQmShEAQXQptw</recordid><startdate>20070322</startdate><enddate>20070322</enddate><creator>KOBAYASHI SHINTARO</creator><creator>YUGAI KAZUHIRO</creator><scope>EVB</scope></search><sort><creationdate>20070322</creationdate><title>METHOD FOR PRODUCING PARTICLES, PARTICLES, AND SINTERED BODY</title><author>KOBAYASHI SHINTARO ; YUGAI KAZUHIRO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2007070211A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2007</creationdate><topic>ARTIFICIAL STONE</topic><topic>CEMENTS</topic><topic>CERAMICS</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS</topic><topic>COMPOUNDS THEREOF</topic><topic>CONCRETE</topic><topic>HUMAN NECESSITIES</topic><topic>HYGIENE</topic><topic>INORGANIC CHEMISTRY</topic><topic>LIME, MAGNESIA</topic><topic>MEDICAL OR VETERINARY SCIENCE</topic><topic>METALLURGY</topic><topic>NON-METALLIC ELEMENTS</topic><topic>PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES</topic><topic>REFRACTORIES</topic><topic>SLAG</topic><topic>TREATMENT OF NATURAL STONE</topic><toplevel>online_resources</toplevel><creatorcontrib>KOBAYASHI SHINTARO</creatorcontrib><creatorcontrib>YUGAI KAZUHIRO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KOBAYASHI SHINTARO</au><au>YUGAI KAZUHIRO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR PRODUCING PARTICLES, PARTICLES, AND SINTERED BODY</title><date>2007-03-22</date><risdate>2007</risdate><abstract>PROBLEM TO BE SOLVED: To provide a particle production method whereby spherical fine particles of a crystalline calcium phosphate-based compound can be efficiently produced at low cost, fine particles (especially, spherical particles) with good flowability produced by the particle production method, and a high-quality sintered body obtained by sintering a molded body of the particles. SOLUTION: The particle production method comprises a first step of mixing a first substance containing phosphorus and a second substance containing calcium so that the phosphorus and the calcium are present in a predetermined mole ratio and feeding, into a heated atmosphere, droplets of slurry containing an amorphous reaction product, obtained by the reaction between the first substance and the second substance, to bring the reaction product into a gaseous state; and a second step of crystallizing the reaction product in the gaseous state to obtain particles mainly composed of a calcium phosphate-based compound containing phosphorus and calcium in the predetermined mole ratio. The heated atmosphere preferably contains plasma produced by ionization of an ambient gas. COPYRIGHT: (C)2007,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS THEREOF CONCRETE HUMAN NECESSITIES HYGIENE INORGANIC CHEMISTRY LIME, MAGNESIA MEDICAL OR VETERINARY SCIENCE METALLURGY NON-METALLIC ELEMENTS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES REFRACTORIES SLAG TREATMENT OF NATURAL STONE |
| title | METHOD FOR PRODUCING PARTICLES, PARTICLES, AND SINTERED BODY |
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