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src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998403242635286_zbwuzi_7922021.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="08km7zl" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>山東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>內蒙古鋼廠碳化硅結合氮化硅公司</p><p><span>***更新：</span>2020-06-28 11:04:19</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="w88vsjv" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">鄒平縣奧翔硅碳制品有限公司</a></p><p><span>聯(lián)系人：</span>張洪恩</p><p><span>郵箱: </span>13884861614@163.com</p><p><span>電話: </span>13884861614</p><p><span>傳真: </span>0543_4534117</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0543-4533667</p><p><span>地址: </span>山東省鄒平市臨池鎮(zhèn)望京村</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="6zdp3he" class="page-proshow02"><p class="title">詳細說明</p><div id="kz872yq" class="box"><p><p> 氮化硅結合碳化硅材料是一類新型耐火材料，該類材料中又包含更細的類別，如氮化硅結合碳化硅輻射管、氮化硅結合碳化硅磚等等。由于該類材料具備多種優(yōu)良性能，氮化硅結合碳化硅材料因具有的節(jié)能環(huán)保特點更是從眾多同性能產(chǎn)品中脫穎而出，未來的市場發(fā)展前景良好。1、原料性質的影響氮化硅結合碳化硅制品涉及到的主要生產(chǎn)原料有：碳化硅、硅粉、氮氣等添加劑。不同于普通的氮化硅材料制品，氮化硅結合碳化硅制品所需要的原料必須具有更高的純度。碳化硅的純度應達到，硅粉的純度應達到99%以上，內蒙古鋼廠碳化硅結合氮化硅公司，氮氣的純度應達到。除了原料的純度需要進行嚴格的控制之外，生產(chǎn)加工過程中還需要對原料的粒度和顆粒級配進行嚴格的控制。原料的粒度過高將會直接影響胚體成型的體積密度，造成胚體的致密性降低，影響**終的產(chǎn)品質量。在原料顆粒級配方面，要注意硅粉的粒度，硅粉的粒度控制可以確保硅粉與氮氣的反應效率，內蒙古鋼廠碳化硅結合氮化硅公司，但是一味降低硅粉的粒度也會存在一定的***影響，即硅粉與氮氣反應速率過快，劇烈的反應造成反應裝置中熱量集聚上升，一旦溫度超過1400℃時，內蒙古鋼廠碳化硅結合氮化硅公司，會誘發(fā)碳化硅表面出現(xiàn)流硅現(xiàn)象，反而不利于產(chǎn)品的質量控制。另外。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="內蒙古鋼廠碳化硅結合氮化硅公司" src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998403242635286_zbwuzi_7922021.jpg"></div><p> 首先小編還是為大家簡單普及一下我們將要講到的氮化硅結合碳化硅材料吧，雖然有些朋友對這個氮化硅結碳化硅比較熟悉了，但還是有簡單普及一下的必要的，氮化硅結合碳化硅材料是以SiC和Si為主要組分，并加入添加劑制成試樣，在氮化爐中輸入純度為，在合適的燒成制度下試樣氮化燒結成為氮化硅結合碳化硅材料。的研究表明經(jīng)過對試樣的顯微結構分析和反應熱力學分析，該材料中的Si3N4是以纖維狀和柱狀兩種形態(tài)存在，認為Si的氮化是由于N2達不到的純凈，其中有少量O2存在，裝窯過程是在日常環(huán)境下進行，然后再抽真空并注入N2置換，爐內呈微正壓狀態(tài)。由于窯爐難以做到完全的封閉，所以在窯爐升溫過程中Si首先被氧化成為SiO，降低了體系中的氧分壓，當氧分壓足夠低時，Si與N2直接形成柱狀Si3N4，氣態(tài)SiO亦可與N2反應生成Si3N4，這是一個氣-氣反應，故生成的Si3N4為纖維狀。氮化反應前SiO主要分布于材料孔隙和表面，因此生成的Si3N4分布不均勻，導致了氮化硅結合碳化硅材料制品從表面到內部的結構不均勻。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="內蒙古鋼廠碳化硅結合氮化硅公司" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238605112080078/2215672.jpg"></div><p> 我們經(jīng)過對氮化硅結合碳化硅材料進行的氮化反應的熱力分析，得出SiO和N2的反應是容易進行的。由于是氣-氣反應，反應動力學上也同樣容易進行，所以SiO與N2反應生成Si3N4的速度必然很快。反應生成Si3N4后放出O2再與Si反應生成SiO，這一反應過程反復進行，促成大量Si3N4生成并以纖維狀存在于SiC顆粒間界。Si3N4-SiC復合材料中，存在間接反應和直接反應，間接反應是Si先與氣氛中的殘余O2反應生成氣態(tài)SiO，再與N2生成Si3N4，產(chǎn)物為纖維狀。間接反應降低了氧分壓，提供了Si與N2直接生成Si3N4的條件，其產(chǎn)物為柱狀，混合存在于結構體的基質中。通過以上對氮化硅結合碳化硅反應機理的表述，我們在生產(chǎn)此材料制品過程中得到一個提示：氮化硅結合碳化硅制品在氮化過程中由于制品的表面與中心存在著氮化率梯度，所以制品的壁不能過厚，即在制作氮化硅結合碳化硅脫硫噴嘴的過程中，在滿足制品強度要求的情況下選擇合適的制品壁厚，為了減薄壁厚，以保證生坯的強度，就要對材料配方和漿料的調制及成形方式進行選擇。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/422222.html</p></div></div></div></div></div><div id="kjldsya" class="page-right twoColRt"><div id="ftq8hgs" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="3egdfbs" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" 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