湖北電廠碳化硅結(jié)合氮化硅鄒平奧翔硅碳供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content=" 我們經(jīng)過(guò)對(duì)氮化硅結(jié)合碳化硅材料進(jìn)行的氮化反應(yīng)的熱力分析，得出SiO和N2的反應(yīng)是容易進(jìn)行的。由于是氣-氣反應(yīng)，反應(yīng)動(dòng)力學(xué)上也同樣容易進(jìn)行，所以SiO與N2反應(yīng)生成Si3N4的速度必然很快。反應(yīng)"><meta name="keywords" content="湖北電廠碳化硅結(jié)合氮化硅"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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href="http://www.cdcfah.com/cp/third-drsb_redianou/">熱電偶</a>?湖北電廠碳化硅結(jié)合氮化硅鄒平奧翔硅碳供應(yīng)</p><div id="thdp4mk" class="leftbox clearfix"><h1>湖北電廠碳化硅結(jié)合氮化硅鄒平奧翔硅碳供應(yīng)</h1><div id="revhalx" class="proBig"><div id="gu8c8j3" 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="btry4sr" 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="v7uhoul" 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>湖北電廠碳化硅結(jié)合氮化硅</p><p><span>***更新：</span>2020-06-18 15:20:53</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="znd34fg" 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="wahoxnj" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="sbn3gwx" class="box"><p><p> 我們經(jīng)過(guò)對(duì)氮化硅結(jié)合碳化硅材料進(jìn)行的氮化反應(yīng)的熱力分析，得出SiO和N2的反應(yīng)是容易進(jìn)行的。由于是氣-氣反應(yīng)，反應(yīng)動(dòng)力學(xué)上也同樣容易進(jìn)行，所以SiO與N2反應(yīng)生成Si3N4的速度必然很快。反應(yīng)生成Si3N4后放出O2再與Si反應(yīng)生成SiO，這一反應(yīng)過(guò)程反復(fù)進(jìn)行，促成大量Si3N4生成并以纖維狀存在于SiC顆粒間界。Si3N4-SiC復(fù)合材料中，存在間接反應(yīng)和直接反應(yīng)，間接反應(yīng)是Si先與氣氛中的殘余O2反應(yīng)生成氣態(tài)SiO，湖北電廠碳化硅結(jié)合氮化硅，再與N2生成Si3N4，產(chǎn)物為纖維狀，湖北電廠碳化硅結(jié)合氮化硅。間接反應(yīng)降低了氧分壓，湖北電廠碳化硅結(jié)合氮化硅，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(jié)構(gòu)體的基質(zhì)中。通過(guò)以上對(duì)氮化硅結(jié)合碳化硅反應(yīng)機(jī)理的表述，我們?cè)谏a(chǎn)此材料制品過(guò)程中得到一個(gè)提示：氮化硅結(jié)合碳化硅制品在氮化過(guò)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(guò)厚，即在制作氮化硅結(jié)合碳化硅脫硫噴嘴的過(guò)程中，在滿足制品強(qiáng)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(qiáng)度，就要對(duì)材料配方和漿料的調(diào)制及成形方式進(jìn)行選擇。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北電廠碳化硅結(jié)合氮化硅" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238605110019531/1898561.jpg"></div><p> 因此可采用較高的氮化溫度加速高溫氮化反應(yīng)。4.影響氮化燒結(jié)過(guò)程的主要因素是反應(yīng)的保溫時(shí)間，它是各級(jí)保溫時(shí)間的總和，該時(shí)間與坯體壁厚尺寸關(guān)系比較大。坯體壁較厚時(shí)，所需保溫時(shí)間長(zhǎng)，反之坯體壁較薄時(shí)，所需保溫時(shí)間短。氮化硅結(jié)合碳化硅在氮化爐中燒制時(shí)，我們對(duì)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(huì)發(fā)生“流硅”反應(yīng)而使氮化反應(yīng)受到影響，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(guò)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。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(duì)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="湖北電廠碳化硅結(jié)合氮化硅" src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998403242478978_zbwuzi_7595535.jpg"></div><p> 可制作大、薄型類棚板，這樣可有效的延長(zhǎng)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(shì)。比如咸陽(yáng)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,而市場(chǎng)上同面積的高鋁質(zhì)和硅酸鹽結(jié)合SiC棚板等厚度一般都在20-400mm左右，二者比校,氮化硅結(jié)合碳化硅棚板單位重址成倍的減少,單位價(jià)格相比較也便宜。因此，該材料的薄型棚板類，在市場(chǎng)上有很強(qiáng)的競(jìng)爭(zhēng)力。氮化硅結(jié)合碳化硅以其良好的材性可制作輕量化、組合化的支柱中空橫輛類的窯具，此種窯具結(jié)構(gòu)簡(jiǎn)單外觀尺寸小、承受彎曲應(yīng)力大，使用壽命長(zhǎng)從而使產(chǎn)品裝載系數(shù)加大，也大量節(jié)約了能耗是現(xiàn)代窯具的必然發(fā)展趨勢(shì)。氮化硅結(jié)合碳化硅在制作窯具成型工藝上一般有：半干成型、注漿成型和等靜壓成型三種，氮化燒成是制備氮化硅結(jié)合碳化硅材料的關(guān)鍵步驥，其結(jié)果是一定要氮化完全，使制品中的殘留游離硅降至比較低。這里主要是控制反應(yīng)速度，若反應(yīng)過(guò)于激烈、原料中的Si被放出的熱熔融而結(jié)塊，造成反應(yīng)不完全，破壞制品的結(jié)構(gòu)。另外在實(shí)際生產(chǎn)中產(chǎn)品規(guī)格多樣，厚薄各異，要預(yù)先確定每種產(chǎn)品所需的氮化時(shí)間及速度困難較大，氮化難以完全。因此。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/302956.html</p></div></div></div></div></div><div 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