Sintering Characteristics in the System MgO-Cr2O3 and Formation of (Mg8-xCrx)Cr16O32 (0≤x≤2.88)
MgO and Cr2O3 powders were mixed in various ratios and pressed to form compacts. They were heated in the carbon powder bed. Starting compacts containing 53 to 63mol% Cr2O3 were densely sintered, particularly the sintered compact with 55mol% Cr2O3 was about 93% in relative density, and composed of (M...
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| Veröffentlicht in: | Journal of the Ceramic Society of Japan 1996/12/01, Vol.104(1216), pp.1121-1124 |
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| container_issue | 1216 |
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| container_title | Journal of the Ceramic Society of Japan |
| container_volume | 104 |
| creator | HASHIMOTO, Shinobu TODA, Seiji YAMAGUCHI, Akira |
| description | MgO and Cr2O3 powders were mixed in various ratios and pressed to form compacts. They were heated in the carbon powder bed. Starting compacts containing 53 to 63mol% Cr2O3 were densely sintered, particularly the sintered compact with 55mol% Cr2O3 was about 93% in relative density, and composed of (Mg8-xCrx)Cr16O32 (0≤x≤2.88). Pores with globular shape in the compacts suggested the sintering in the presence of a liquid. Under reductive atmosphere coexisting with carbon, a liquid of the Cr-Cr2O3-MgO system is considered to form due to reduction of the Cr2O3 in the compact. During cooling, the (Mg8-xCrx)Cr16O32 may precipitate from the liquid. When the compound was exposed to air during heating, this phase was unstable and changed to MgCr2O4 and Cr2O3 at about 300°C. |
| doi_str_mv | 10.2109/jcersj.104.1121 |
| format | Article |
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They were heated in the carbon powder bed. Starting compacts containing 53 to 63mol% Cr2O3 were densely sintered, particularly the sintered compact with 55mol% Cr2O3 was about 93% in relative density, and composed of (Mg8-xCrx)Cr16O32 (0≤x≤2.88). Pores with globular shape in the compacts suggested the sintering in the presence of a liquid. Under reductive atmosphere coexisting with carbon, a liquid of the Cr-Cr2O3-MgO system is considered to form due to reduction of the Cr2O3 in the compact. During cooling, the (Mg8-xCrx)Cr16O32 may precipitate from the liquid. When the compound was exposed to air during heating, this phase was unstable and changed to MgCr2O4 and Cr2O3 at about 300°C.</description><identifier>ISSN: 0914-5400</identifier><identifier>EISSN: 1882-1022</identifier><identifier>DOI: 10.2109/jcersj.104.1121</identifier><language>eng ; jpn</language><publisher>The Ceramic Society of Japan</publisher><subject>(Mg8-xCrx)Cr16O32 ; Oxidation resistance ; Relative density ; Sintering behavior</subject><ispartof>Journal of the Ceramic Society of Japan, 1996/12/01, Vol.104(1216), pp.1121-1124</ispartof><rights>The Ceramic Society of Japan</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c341t-bf37a4e8b79ffe0bfa71a431beb24f1eb5df89d8677cd25de311c31cb12ffe053</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1883,27924,27925</link.rule.ids></links><search><creatorcontrib>HASHIMOTO, Shinobu</creatorcontrib><creatorcontrib>TODA, Seiji</creatorcontrib><creatorcontrib>YAMAGUCHI, Akira</creatorcontrib><title>Sintering Characteristics in the System MgO-Cr2O3 and Formation of (Mg8-xCrx)Cr16O32 (0≤x≤2.88)</title><title>Journal of the Ceramic Society of Japan</title><addtitle>J. Ceram. Soc. Japan</addtitle><description>MgO and Cr2O3 powders were mixed in various ratios and pressed to form compacts. They were heated in the carbon powder bed. Starting compacts containing 53 to 63mol% Cr2O3 were densely sintered, particularly the sintered compact with 55mol% Cr2O3 was about 93% in relative density, and composed of (Mg8-xCrx)Cr16O32 (0≤x≤2.88). Pores with globular shape in the compacts suggested the sintering in the presence of a liquid. Under reductive atmosphere coexisting with carbon, a liquid of the Cr-Cr2O3-MgO system is considered to form due to reduction of the Cr2O3 in the compact. During cooling, the (Mg8-xCrx)Cr16O32 may precipitate from the liquid. When the compound was exposed to air during heating, this phase was unstable and changed to MgCr2O4 and Cr2O3 at about 300°C.</description><subject>(Mg8-xCrx)Cr16O32</subject><subject>Oxidation resistance</subject><subject>Relative density</subject><subject>Sintering behavior</subject><issn>0914-5400</issn><issn>1882-1022</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNpNkL1uwjAURq2qlYooc1ePMCT42k7ijFVUSiVQBto5sh07BEFS2RngEfoefbI-SRMFoQ73TzrfHQ5Cz0BCCiRdHrRx_hAC4SEAhTs0ASFoAITSezQhKfAg4oQ8opn3tSKEcsFjwiZI7-qmM65uKpztpZN6OHxXa4_rBnd7g3cX35kT3lZ5kDmaMyybEq9ad5Jd3Ta4tXi-rURwztx5kTmIc0bxnPx-_5z7oqEQiyf0YOXRm9l1TtHn6vUjWweb_O09e9kEmnHoAmVZIrkRKkmtNURZmYDkDJRRlFswKiqtSEsRJ4kuaVQaBqAZaAV04CM2Rcvxr3at987Y4svVJ-kuBZBi0FSMmvqTF4OmPpGPiYPvZGVuvHS9gaO58pAKMWYoxP-Wvt9I3csrTMP-ACN-d7I</recordid><startdate>19961201</startdate><enddate>19961201</enddate><creator>HASHIMOTO, Shinobu</creator><creator>TODA, Seiji</creator><creator>YAMAGUCHI, Akira</creator><general>The Ceramic Society of Japan</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19961201</creationdate><title>Sintering Characteristics in the System MgO-Cr2O3 and Formation of (Mg8-xCrx)Cr16O32 (0≤x≤2.88)</title><author>HASHIMOTO, Shinobu ; TODA, Seiji ; YAMAGUCHI, Akira</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c341t-bf37a4e8b79ffe0bfa71a431beb24f1eb5df89d8677cd25de311c31cb12ffe053</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng ; jpn</language><creationdate>1996</creationdate><topic>(Mg8-xCrx)Cr16O32</topic><topic>Oxidation resistance</topic><topic>Relative density</topic><topic>Sintering behavior</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>HASHIMOTO, Shinobu</creatorcontrib><creatorcontrib>TODA, Seiji</creatorcontrib><creatorcontrib>YAMAGUCHI, Akira</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of the Ceramic Society of Japan</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>HASHIMOTO, Shinobu</au><au>TODA, Seiji</au><au>YAMAGUCHI, Akira</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sintering Characteristics in the System MgO-Cr2O3 and Formation of (Mg8-xCrx)Cr16O32 (0≤x≤2.88)</atitle><jtitle>Journal of the Ceramic Society of Japan</jtitle><addtitle>J. Ceram. Soc. Japan</addtitle><date>1996-12-01</date><risdate>1996</risdate><volume>104</volume><issue>1216</issue><spage>1121</spage><epage>1124</epage><pages>1121-1124</pages><issn>0914-5400</issn><eissn>1882-1022</eissn><abstract>MgO and Cr2O3 powders were mixed in various ratios and pressed to form compacts. They were heated in the carbon powder bed. Starting compacts containing 53 to 63mol% Cr2O3 were densely sintered, particularly the sintered compact with 55mol% Cr2O3 was about 93% in relative density, and composed of (Mg8-xCrx)Cr16O32 (0≤x≤2.88). Pores with globular shape in the compacts suggested the sintering in the presence of a liquid. Under reductive atmosphere coexisting with carbon, a liquid of the Cr-Cr2O3-MgO system is considered to form due to reduction of the Cr2O3 in the compact. During cooling, the (Mg8-xCrx)Cr16O32 may precipitate from the liquid. When the compound was exposed to air during heating, this phase was unstable and changed to MgCr2O4 and Cr2O3 at about 300°C.</abstract><pub>The Ceramic Society of Japan</pub><doi>10.2109/jcersj.104.1121</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of the Ceramic Society of Japan, 1996/12/01, Vol.104(1216), pp.1121-1124 |
| issn | 0914-5400 1882-1022 |
| language | eng ; jpn |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; J-STAGE (Japan Science & Technology Information Aggregator, Electronic) Freely Available Titles - Japanese |
| subjects | (Mg8-xCrx)Cr16O32 Oxidation resistance Relative density Sintering behavior |
| title | Sintering Characteristics in the System MgO-Cr2O3 and Formation of (Mg8-xCrx)Cr16O32 (0≤x≤2.88) |
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