Preparation of high thermal conductivity and high strength silicon nitride ceramics with YbH_2-MgO system as sintering aid
Using YbH_2-MgO system as a sintering aid, a two-step sintering method was used to prepare high thermal conductivity and high strength silicon nitride ceramics. The densification behavior, phase composition, microscopic morphology, and thermal conductivity of YbH_2-MgO on silicon nitride were studie...
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| Veröffentlicht in: | Wu ji cai liao xue bao 2021-01, Vol.36 (9), p.61 |
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| container_title | Wu ji cai liao xue bao |
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| creator | Wang, Weide Chen, Zuobei Li, Shishuai Yao, Dongxu Zuo, Kaihui Zeng, Yuping |
| description | Using YbH_2-MgO system as a sintering aid, a two-step sintering method was used to prepare high thermal conductivity and high strength silicon nitride ceramics. The densification behavior, phase composition, microscopic morphology, and thermal conductivity of YbH_2-MgO on silicon nitride were studied. And the influence of flexural strength. In the pre-sintering stage, YbH_2 reduces SiO_2 and generates Yb_2O_3 in situ at the same time, and then forms the "anoxic-nitrogen-rich" liquid phase. This liquid phase is not only conducive to the growth of crystal grains, but also more conducive to hindering the generation of lattice oxygen. Compared with the Yb_2O_3-MgO additive system, the β-Si_3N_4 has larger grain size, fewer lattice defects, and low thermal conductivity. There are fewer phases, and the thermal conductivity can reach 131.15 W·m~(–1)·K~(... |
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The densification behavior, phase composition, microscopic morphology, and thermal conductivity of YbH_2-MgO on silicon nitride were studied. And the influence of flexural strength. In the pre-sintering stage, YbH_2 reduces SiO_2 and generates Yb_2O_3 in situ at the same time, and then forms the "anoxic-nitrogen-rich" liquid phase. This liquid phase is not only conducive to the growth of crystal grains, but also more conducive to hindering the generation of lattice oxygen. Compared with the Yb_2O_3-MgO additive system, the β-Si_3N_4 has larger grain size, fewer lattice defects, and low thermal conductivity. There are fewer phases, and the thermal conductivity can reach 131.15 W·m~(–1)·K~(...</description><identifier>ISSN: 1000-324X</identifier><language>chi</language><publisher>Beijing: Chinese Academy of Sciences</publisher><subject>Ceramics ; Crystal defects ; Crystal growth ; Crystal lattices ; Densification ; Flexural strength ; Grain size ; Heat conductivity ; Heat transfer ; High strength ; Liquid phases ; Magnesium oxide ; Morphology ; Phase composition ; Silicon nitride ; Sintering ; Sintering aids ; Thermal conductivity</subject><ispartof>Wu ji cai liao xue bao, 2021-01, Vol.36 (9), p.61</ispartof><rights>Copyright Chinese Academy of Sciences 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784</link.rule.ids></links><search><creatorcontrib>Wang, Weide</creatorcontrib><creatorcontrib>Chen, Zuobei</creatorcontrib><creatorcontrib>Li, Shishuai</creatorcontrib><creatorcontrib>Yao, Dongxu</creatorcontrib><creatorcontrib>Zuo, Kaihui</creatorcontrib><creatorcontrib>Zeng, Yuping</creatorcontrib><title>Preparation of high thermal conductivity and high strength silicon nitride ceramics with YbH_2-MgO system as sintering aid</title><title>Wu ji cai liao xue bao</title><description>Using YbH_2-MgO system as a sintering aid, a two-step sintering method was used to prepare high thermal conductivity and high strength silicon nitride ceramics. The densification behavior, phase composition, microscopic morphology, and thermal conductivity of YbH_2-MgO on silicon nitride were studied. And the influence of flexural strength. In the pre-sintering stage, YbH_2 reduces SiO_2 and generates Yb_2O_3 in situ at the same time, and then forms the "anoxic-nitrogen-rich" liquid phase. This liquid phase is not only conducive to the growth of crystal grains, but also more conducive to hindering the generation of lattice oxygen. Compared with the Yb_2O_3-MgO additive system, the β-Si_3N_4 has larger grain size, fewer lattice defects, and low thermal conductivity. There are fewer phases, and the thermal conductivity can reach 131.15 W·m~(–1)·K~(...</description><subject>Ceramics</subject><subject>Crystal defects</subject><subject>Crystal growth</subject><subject>Crystal lattices</subject><subject>Densification</subject><subject>Flexural strength</subject><subject>Grain size</subject><subject>Heat conductivity</subject><subject>Heat transfer</subject><subject>High strength</subject><subject>Liquid phases</subject><subject>Magnesium oxide</subject><subject>Morphology</subject><subject>Phase composition</subject><subject>Silicon nitride</subject><subject>Sintering</subject><subject>Sintering aids</subject><subject>Thermal conductivity</subject><issn>1000-324X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqNi7tuwkAQRbdIJFDCP4xEbWkxfpAaBdFEUKRIKmuxB3siexdmxkHk61kpfADVPdI598lMF9baZJlmXxMzE6GDtWW2yrKinJq_PePJsVMKHsIROmo70A55cD3UwTdjrfRLegXnm38ryuhbjUA9xQQ8KVODUCO7gWqBC0X7fdhWafLR7kCuojiAk_jwiky-BUfNq3k-ul5wdt8XM9-8f663yYnDeUTR6ieM7KOq0vwtL_IyXxTLx6obsidPKg</recordid><startdate>20210101</startdate><enddate>20210101</enddate><creator>Wang, Weide</creator><creator>Chen, Zuobei</creator><creator>Li, Shishuai</creator><creator>Yao, Dongxu</creator><creator>Zuo, Kaihui</creator><creator>Zeng, Yuping</creator><general>Chinese Academy of Sciences</general><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20210101</creationdate><title>Preparation of high thermal conductivity and high strength silicon nitride ceramics with YbH_2-MgO system as sintering aid</title><author>Wang, Weide ; Chen, Zuobei ; Li, Shishuai ; Yao, Dongxu ; Zuo, Kaihui ; Zeng, Yuping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_25956575163</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>chi</language><creationdate>2021</creationdate><topic>Ceramics</topic><topic>Crystal defects</topic><topic>Crystal growth</topic><topic>Crystal lattices</topic><topic>Densification</topic><topic>Flexural strength</topic><topic>Grain size</topic><topic>Heat conductivity</topic><topic>Heat transfer</topic><topic>High strength</topic><topic>Liquid phases</topic><topic>Magnesium oxide</topic><topic>Morphology</topic><topic>Phase composition</topic><topic>Silicon nitride</topic><topic>Sintering</topic><topic>Sintering aids</topic><topic>Thermal conductivity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Weide</creatorcontrib><creatorcontrib>Chen, Zuobei</creatorcontrib><creatorcontrib>Li, Shishuai</creatorcontrib><creatorcontrib>Yao, Dongxu</creatorcontrib><creatorcontrib>Zuo, Kaihui</creatorcontrib><creatorcontrib>Zeng, Yuping</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Wu ji cai liao xue bao</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Weide</au><au>Chen, Zuobei</au><au>Li, Shishuai</au><au>Yao, Dongxu</au><au>Zuo, Kaihui</au><au>Zeng, Yuping</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation of high thermal conductivity and high strength silicon nitride ceramics with YbH_2-MgO system as sintering aid</atitle><jtitle>Wu ji cai liao xue bao</jtitle><date>2021-01-01</date><risdate>2021</risdate><volume>36</volume><issue>9</issue><spage>61</spage><pages>61-</pages><issn>1000-324X</issn><abstract>Using YbH_2-MgO system as a sintering aid, a two-step sintering method was used to prepare high thermal conductivity and high strength silicon nitride ceramics. The densification behavior, phase composition, microscopic morphology, and thermal conductivity of YbH_2-MgO on silicon nitride were studied. And the influence of flexural strength. In the pre-sintering stage, YbH_2 reduces SiO_2 and generates Yb_2O_3 in situ at the same time, and then forms the "anoxic-nitrogen-rich" liquid phase. This liquid phase is not only conducive to the growth of crystal grains, but also more conducive to hindering the generation of lattice oxygen. Compared with the Yb_2O_3-MgO additive system, the β-Si_3N_4 has larger grain size, fewer lattice defects, and low thermal conductivity. There are fewer phases, and the thermal conductivity can reach 131.15 W·m~(–1)·K~(...</abstract><cop>Beijing</cop><pub>Chinese Academy of Sciences</pub></addata></record> |
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| language | chi |
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| source | EZB-FREE-00999 freely available EZB journals |
| subjects | Ceramics Crystal defects Crystal growth Crystal lattices Densification Flexural strength Grain size Heat conductivity Heat transfer High strength Liquid phases Magnesium oxide Morphology Phase composition Silicon nitride Sintering Sintering aids Thermal conductivity |
| title | Preparation of high thermal conductivity and high strength silicon nitride ceramics with YbH_2-MgO system as sintering aid |
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