SINTERED POLYCRYSTAL TRANSPARENT YTTRIUM-ALUMINUM GARNET AND ITS PRODUCTION
PURPOSE:To obtain a sintered polycrystal transparent yttrium-aluminum garnet with a simple process by using F ion as a sintering assistant, specifying the molar ratio of Y2O3 to Al2O3 in the material and sintering the material under specified conditions. CONSTITUTION:At least one kind of material se...
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| creator | YANAGIYA TAKAKIMI |
| description | PURPOSE:To obtain a sintered polycrystal transparent yttrium-aluminum garnet with a simple process by using F ion as a sintering assistant, specifying the molar ratio of Y2O3 to Al2O3 in the material and sintering the material under specified conditions. CONSTITUTION:At least one kind of material selected from a group consisting of Y2O3 and the compds. which are thermally decomposed into Y2O3 by calcina tion and at least one kind of material selected from a group consisting of Al2O3 and the compd. which are thermally decomposed into Al2O3 by calcination are mixed so that the molar ratio of Y2O3 to Al2O3 after calcination is con trolled to 0.374:0.626 to 0.40:0.60, and the mixture is calcined at 500-1300 deg.C. In this case, |
| format | Patent |
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CONSTITUTION:At least one kind of material selected from a group consisting of Y2O3 and the compds. which are thermally decomposed into Y2O3 by calcina tion and at least one kind of material selected from a group consisting of Al2O3 and the compd. which are thermally decomposed into Al2O3 by calcination are mixed so that the molar ratio of Y2O3 to Al2O3 after calcination is con trolled to 0.374:0.626 to 0.40:0.60, and the mixture is calcined at 500-1300 deg.C. In this case, <=4000 weight ppm, based on the total amt. of the calcination product, of F<-> ion is incorporated into the product. The calcination product is primarily sintered at 1300-1550 deg.C in an oxygen-free atmosphere and then at 1650-1900oC in an oxygen-free atmosphere to obtain a polycrystal transparent yttrium-aluminum garnet contg. 3-1200 weight ppm F<-> ion.</description><language>eng</language><subject>AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE ; APPARATUS THEREFOR ; ARTIFICIAL STONE ; CEMENTS ; CERAMICS ; CHEMISTRY ; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS ; CONCRETE ; CRYSTAL GROWTH ; LIME, MAGNESIA ; METALLURGY ; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; PHYSICS ; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE ; REFINING BY ZONE-MELTING OF MATERIAL ; REFRACTORIES ; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE ; SINGLE-CRYSTAL-GROWTH ; SLAG ; TREATMENT OF NATURAL STONE ; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL</subject><creationdate>1992</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19920224&DB=EPODOC&CC=JP&NR=H0455363A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19920224&DB=EPODOC&CC=JP&NR=H0455363A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YANAGIYA TAKAKIMI</creatorcontrib><title>SINTERED POLYCRYSTAL TRANSPARENT YTTRIUM-ALUMINUM GARNET AND ITS PRODUCTION</title><description>PURPOSE:To obtain a sintered polycrystal transparent yttrium-aluminum garnet with a simple process by using F<-> ion as a sintering assistant, specifying the molar ratio of Y2O3 to Al2O3 in the material and sintering the material under specified conditions. CONSTITUTION:At least one kind of material selected from a group consisting of Y2O3 and the compds. which are thermally decomposed into Y2O3 by calcina tion and at least one kind of material selected from a group consisting of Al2O3 and the compd. which are thermally decomposed into Al2O3 by calcination are mixed so that the molar ratio of Y2O3 to Al2O3 after calcination is con trolled to 0.374:0.626 to 0.40:0.60, and the mixture is calcined at 500-1300 deg.C. In this case, <=4000 weight ppm, based on the total amt. of the calcination product, of F<-> ion is incorporated into the product. The calcination product is primarily sintered at 1300-1550 deg.C in an oxygen-free atmosphere and then at 1650-1900oC in an oxygen-free atmosphere to obtain a polycrystal transparent yttrium-aluminum garnet contg. 3-1200 weight ppm F<-> ion.</description><subject>AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE</subject><subject>APPARATUS THEREFOR</subject><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>CONCRETE</subject><subject>CRYSTAL GROWTH</subject><subject>LIME, MAGNESIA</subject><subject>METALLURGY</subject><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>PHYSICS</subject><subject>PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</subject><subject>REFINING BY ZONE-MELTING OF MATERIAL</subject><subject>REFRACTORIES</subject><subject>SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</subject><subject>SINGLE-CRYSTAL-GROWTH</subject><subject>SLAG</subject><subject>TREATMENT OF NATURAL STONE</subject><subject>UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1992</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNyrEKwjAQANAsDqL-w_1AQYh1P5poo8klXC5Dp1JKnEQL9f9x8QOc3vK26p4diWVrIEU_dDxkQQ_CSDkhWxIYRNiV0KAvwVEJcEUmK4BkwEmGxNGUTlykvdo8pudaDz93Ci5Wur6py3us6zLN9VU_4y31x1Pb6rNG_Uf5Aq4RLlo</recordid><startdate>19920224</startdate><enddate>19920224</enddate><creator>YANAGIYA TAKAKIMI</creator><scope>EVB</scope></search><sort><creationdate>19920224</creationdate><title>SINTERED POLYCRYSTAL TRANSPARENT YTTRIUM-ALUMINUM GARNET AND ITS PRODUCTION</title><author>YANAGIYA TAKAKIMI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0455363A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1992</creationdate><topic>AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE</topic><topic>APPARATUS THEREFOR</topic><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>CONCRETE</topic><topic>CRYSTAL GROWTH</topic><topic>LIME, MAGNESIA</topic><topic>METALLURGY</topic><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><topic>PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</topic><topic>REFINING BY ZONE-MELTING OF MATERIAL</topic><topic>REFRACTORIES</topic><topic>SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</topic><topic>SINGLE-CRYSTAL-GROWTH</topic><topic>SLAG</topic><topic>TREATMENT OF NATURAL STONE</topic><topic>UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL</topic><toplevel>online_resources</toplevel><creatorcontrib>YANAGIYA TAKAKIMI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YANAGIYA TAKAKIMI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>SINTERED POLYCRYSTAL TRANSPARENT YTTRIUM-ALUMINUM GARNET AND ITS PRODUCTION</title><date>1992-02-24</date><risdate>1992</risdate><abstract>PURPOSE:To obtain a sintered polycrystal transparent yttrium-aluminum garnet with a simple process by using F<-> ion as a sintering assistant, specifying the molar ratio of Y2O3 to Al2O3 in the material and sintering the material under specified conditions. CONSTITUTION:At least one kind of material selected from a group consisting of Y2O3 and the compds. which are thermally decomposed into Y2O3 by calcina tion and at least one kind of material selected from a group consisting of Al2O3 and the compd. which are thermally decomposed into Al2O3 by calcination are mixed so that the molar ratio of Y2O3 to Al2O3 after calcination is con trolled to 0.374:0.626 to 0.40:0.60, and the mixture is calcined at 500-1300 deg.C. In this case, <=4000 weight ppm, based on the total amt. of the calcination product, of F<-> ion is incorporated into the product. The calcination product is primarily sintered at 1300-1550 deg.C in an oxygen-free atmosphere and then at 1650-1900oC in an oxygen-free atmosphere to obtain a polycrystal transparent yttrium-aluminum garnet contg. 3-1200 weight ppm F<-> ion.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE CRYSTAL GROWTH LIME, MAGNESIA METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL REFRACTORIES SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH SLAG TREATMENT OF NATURAL STONE UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL |
| title | SINTERED POLYCRYSTAL TRANSPARENT YTTRIUM-ALUMINUM GARNET AND ITS PRODUCTION |
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