Vessel for refractory use having multi-layered wall
The inventive vessel, e.g. crucible, made of a refractory inorganic material such as boron nitride has a multi-layered wall structure which is an integral alternate lamination of layers of higher density and layers of lower density. Such a multi-layered structure can be formed by the procedure of py...
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| creator | YANAGISAWA ISAO KUBOTA YOSHIHIRO IWAI RYOJI |
| description | The inventive vessel, e.g. crucible, made of a refractory inorganic material such as boron nitride has a multi-layered wall structure which is an integral alternate lamination of layers of higher density and layers of lower density. Such a multi-layered structure can be formed by the procedure of pyrolytic chemical vapor deposition in the course of which the concentration of the gaseous reactants, e.g. boron trichloride and ammonia, in the atmosphere is changed, i.e. increased or decreased, under control so that the resultant deposited boron nitride layer has different densities in the portions deposited before and after the concentration change. By virtue of the multi-layered wall structure, the vessel has outstandingly improved resistance against thermal shock and can withstand prolonged use or many times of repeated use at high temperatures without breaking or crack formation. |
| format | Patent |
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Such a multi-layered structure can be formed by the procedure of pyrolytic chemical vapor deposition in the course of which the concentration of the gaseous reactants, e.g. boron trichloride and ammonia, in the atmosphere is changed, i.e. increased or decreased, under control so that the resultant deposited boron nitride layer has different densities in the portions deposited before and after the concentration change. By virtue of the multi-layered wall structure, the vessel has outstandingly improved resistance against thermal shock and can withstand prolonged use or many times of repeated use at high temperatures without breaking or crack formation.</description><edition>4</edition><language>eng</language><subject>BLASTING ; FURNACES ; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL ; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC ; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS ; HEATING ; KILNS ; LAYERED PRODUCTS ; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ; LIGHTING ; MECHANICAL ENGINEERING ; OPEN SINTERING OR LIKE APPARATUS ; OVENS ; PERFORMING OPERATIONS ; RETORTS ; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER ; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ; TECHNICAL SUBJECTS COVERED BY FORMER USPC ; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ; TRANSPORTING ; WEAPONS ; WORKING CEMENT, CLAY, OR STONE</subject><creationdate>1988</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=19881004&DB=EPODOC&CC=US&NR=4775565A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19881004&DB=EPODOC&CC=US&NR=4775565A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YANAGISAWA; ISAO</creatorcontrib><creatorcontrib>KUBOTA; YOSHIHIRO</creatorcontrib><creatorcontrib>IWAI; RYOJI</creatorcontrib><title>Vessel for refractory use having multi-layered wall</title><description>The inventive vessel, e.g. crucible, made of a refractory inorganic material such as boron nitride has a multi-layered wall structure which is an integral alternate lamination of layers of higher density and layers of lower density. Such a multi-layered structure can be formed by the procedure of pyrolytic chemical vapor deposition in the course of which the concentration of the gaseous reactants, e.g. boron trichloride and ammonia, in the atmosphere is changed, i.e. increased or decreased, under control so that the resultant deposited boron nitride layer has different densities in the portions deposited before and after the concentration change. By virtue of the multi-layered wall structure, the vessel has outstandingly improved resistance against thermal shock and can withstand prolonged use or many times of repeated use at high temperatures without breaking or crack formation.</description><subject>BLASTING</subject><subject>FURNACES</subject><subject>FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL</subject><subject>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</subject><subject>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</subject><subject>HEATING</subject><subject>KILNS</subject><subject>LAYERED PRODUCTS</subject><subject>LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>OPEN SINTERING OR LIKE APPARATUS</subject><subject>OVENS</subject><subject>PERFORMING OPERATIONS</subject><subject>RETORTS</subject><subject>SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</subject><subject>TRANSPORTING</subject><subject>WEAPONS</subject><subject>WORKING CEMENT, CLAY, OR STONE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1988</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDAOSy0uTs1RSMsvUihKTStKTC7JL6pUKC1OVchILMvMS1fILc0pydTNSaxMLUpNUShPzMnhYWBNS8wpTuWF0twM8m6uIc4euqkF-fGpxQWJyal5qSXxocEm5uampmamjsaEVQAAaOssBA</recordid><startdate>19881004</startdate><enddate>19881004</enddate><creator>YANAGISAWA; ISAO</creator><creator>KUBOTA; YOSHIHIRO</creator><creator>IWAI; RYOJI</creator><scope>EVB</scope></search><sort><creationdate>19881004</creationdate><title>Vessel for refractory use having multi-layered wall</title><author>YANAGISAWA; ISAO ; KUBOTA; YOSHIHIRO ; IWAI; RYOJI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US4775565A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1988</creationdate><topic>BLASTING</topic><topic>FURNACES</topic><topic>FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL</topic><topic>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</topic><topic>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</topic><topic>HEATING</topic><topic>KILNS</topic><topic>LAYERED PRODUCTS</topic><topic>LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>OPEN SINTERING OR LIKE APPARATUS</topic><topic>OVENS</topic><topic>PERFORMING OPERATIONS</topic><topic>RETORTS</topic><topic>SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</topic><topic>TRANSPORTING</topic><topic>WEAPONS</topic><topic>WORKING CEMENT, CLAY, OR STONE</topic><toplevel>online_resources</toplevel><creatorcontrib>YANAGISAWA; ISAO</creatorcontrib><creatorcontrib>KUBOTA; YOSHIHIRO</creatorcontrib><creatorcontrib>IWAI; RYOJI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YANAGISAWA; ISAO</au><au>KUBOTA; YOSHIHIRO</au><au>IWAI; RYOJI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Vessel for refractory use having multi-layered wall</title><date>1988-10-04</date><risdate>1988</risdate><abstract>The inventive vessel, e.g. crucible, made of a refractory inorganic material such as boron nitride has a multi-layered wall structure which is an integral alternate lamination of layers of higher density and layers of lower density. Such a multi-layered structure can be formed by the procedure of pyrolytic chemical vapor deposition in the course of which the concentration of the gaseous reactants, e.g. boron trichloride and ammonia, in the atmosphere is changed, i.e. increased or decreased, under control so that the resultant deposited boron nitride layer has different densities in the portions deposited before and after the concentration change. By virtue of the multi-layered wall structure, the vessel has outstandingly improved resistance against thermal shock and can withstand prolonged use or many times of repeated use at high temperatures without breaking or crack formation.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING KILNS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIGHTING MECHANICAL ENGINEERING OPEN SINTERING OR LIKE APPARATUS OVENS PERFORMING OPERATIONS RETORTS SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WEAPONS WORKING CEMENT, CLAY, OR STONE |
| title | Vessel for refractory use having multi-layered wall |
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