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class="container clearfix tcPro"><section class="home-main container clearfix"><div id="zw8dfu8" class="twoCol"><div id="hoo37z8" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/first-_jxjxysb/">機(jī)械及行業(yè)設(shè)備</a>?<a href="http://m.cdcfah.com/cp/second-jxjxysb_drsb/">電熱設(shè)備</a>?<a href="http://m.cdcfah.com/cp/third-drsb_redianou/">熱電偶</a>?遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商鄒平奧翔硅碳供應(yīng)</p><div id="33mqaci" class="leftbox clearfix"><h1>遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商鄒平奧翔硅碳供應(yīng)</h1><div id="s8ophy3" class="proBig"><div id="8zql889" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238605110019531/1898561.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="swxu2jy" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238605110019531/1898561.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8qchgzt" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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(guān)鍵詞：</span>遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商</p><p><span>***更新：</span>2020-06-22 21:20:11</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="np3k2fm" 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(jī): </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(dāng)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="ivvct79" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ah7fkwl" class="box"><p><p> 氮化硅結(jié)合碳化硅在氮化爐中燒制時(shí)，我們對氮化硅材料氮化燒結(jié)環(huán)境下的研究認(rèn)為在燒成反應(yīng)中存在著間接反應(yīng)和直接反應(yīng)。在反應(yīng)中，作為反應(yīng)的參與者，N2的分壓起著極為重要的作用，但不論氮分壓的大小如何，只要生產(chǎn)Si3N4，那么在坯體內(nèi)就存在著N2的濃度梯度和生成Si3N4的濃度梯度，而且這種濃度梯度的方向是相同的，越是接近坯體表面其兩個(gè)組分的濃度越高。要想反應(yīng)不斷向坯體內(nèi)部推進(jìn)就必須確保合適的氮分壓和反應(yīng)溫度。在純Si3N4的氮化燒結(jié)中，通常會發(fā)生“流硅”反應(yīng)而使氮化反應(yīng)受到影響，遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商，這是因?yàn)榈磻?yīng)是一個(gè)放熱反應(yīng)，為使反應(yīng)完全又將Si粉的粒徑控制在很小范圍內(nèi)，這樣在氮化過程中若控制不當(dāng)時(shí)，供給熱量和生成熱量疊加而使溫度達(dá)到了硅的熔點(diǎn)使Si粉熔化而產(chǎn)生所謂的“流硅”現(xiàn)象，遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商，遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商。在氮化硅結(jié)合碳化硅的氮化燒結(jié)中，Si粉的濃度含量相對較低，而濃度較高的SiC又有著較大的導(dǎo)熱率從而了“流硅”現(xiàn)象的發(fā)生。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238605110019531/1898561.jpg"></div><p> 但還是有簡單普及一下的必要的，氮化硅結(jié)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(jié)成為氮化硅結(jié)合碳化硅材料。的研究表明經(jīng)過對試樣的顯微結(jié)構(gòu)分析和反應(yīng)熱力學(xué)分析，該材料中的Si3N4是以纖維狀和柱狀兩種形態(tài)存在，認(rèn)為Si的氮化是由于N2達(dá)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(jìn)行，然后再抽真空并注入N2置換，爐內(nèi)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(dāng)氧分壓足夠低時(shí)，Si與N2直接形成柱狀Si3N4，氣態(tài)SiO亦可與N2反應(yīng)生成Si3N4，這是一個(gè)氣-氣反應(yīng)，故生成的Si3N4為纖維狀。氮化反應(yīng)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(dǎo)致了氮化硅結(jié)合碳化硅材料制品從表面到內(nèi)部的結(jié)構(gòu)不均勻。氮化硅結(jié)合碳化硅材料強(qiáng)度大,抗熱震、導(dǎo)熱性好。因此，可制作大、薄型類棚板，這樣可有效的延長窯具使用壽命，減少耐火材料與制品的比例，節(jié)約能耗。另外,和同面積的其他材料窯具相比，其單位價(jià)格也占有優(yōu)勢。比如咸陽陶瓷研究設(shè)計(jì)院生產(chǎn)的520mm×500mm的氮化硅結(jié)合碳化硅棚板厚度10-12mm。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="遼寧鋼廠碳化硅結(jié)合氮化硅經(jīng)銷商" src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998403242635286_zbwuzi_7922021.jpg"></div><p> 氮化硅結(jié)合碳化硅制品涉及到的主要生產(chǎn)原料有：碳化硅、硅粉、氮?dú)獾忍砑觿２煌谄胀ǖ牡璨牧现破?，氮化硅結(jié)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(yīng)達(dá)到，硅粉的純度應(yīng)達(dá)到99%以上，氮?dú)獾募兌葢?yīng)達(dá)到。除了原料的純度需要進(jìn)行嚴(yán)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(jìn)行嚴(yán)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(zhì)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?dú)獾姆磻?yīng)效率，但是一味降低硅粉的粒度也會存在一定的負(fù)面影響，即硅粉與氮?dú)夥磻?yīng)速率過快，劇烈的反應(yīng)造成反應(yīng)裝置中熱量集聚上升，一旦溫度超過1400℃時(shí)，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(zhì)量控制。另外，在氮化硅結(jié)合碳化硅制品的原料中加入ZrSiO4可以起到改善產(chǎn)品抗氧化性的作用。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/354669.html</p></div></div></div></div></div><div id="ahxegsp" class="page-right twoColRt"><div id="pe7fhub" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="mbyam8t" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img 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