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小學(xué)生用鉛筆首要經(jīng)濟(jì)成分（<span style="font-weight: bold;">石墨粉</span>）涂抹到衣服自己今后我們特別難洗。<br> 用洗滌劑清洗，或用牙膏清洗，由于石墨粉首要是油性的。在孤立氧條件下，其熔點(diǎn)在3000℃以上，是耐溫礦藏之一。石墨粉在室溫下的化學(xué)性質(zhì)比較安穩(wěn)，不溶于水，稀酸，稀堿和有機(jī)溶劑；該資料具有耐高溫和導(dǎo)電性，可耐火資料，導(dǎo)電資料，耐磨光滑資料。<br> <span style="font-weight: bold;"> 石墨粉</span>柔軟，黑灰色，油膩感，會(huì)污染紙衣。硬度為1-2，跟著雜質(zhì)含量的添加，沿垂直方向的硬度添加到3-5。比重是1.9-2.3。其熔點(diǎn)在3000°c 以上，是隔氧條件下的耐熱礦藏之一。<br> <span style="font-weight: bold;">石墨粉</span>末在室溫下相對(duì)安穩(wěn)，不溶于水、稀酸、稀堿和有機(jī)溶劑，在不同溫度下與氧氣反應(yīng)生成二氧化碳或一氧化碳，只要氟能直接與鹵素中的一氧化碳反應(yīng)，在加熱條件下，石墨粉末易被酸氧化，在高溫下也能與多種金屬反應(yīng)生成金屬碳化物，可在高溫下熔煉。 <br><br></p>  </div> <div id="by64r9nm" class="navs clearfix"> <div id="by64r9nm" class="pre"> <span>上一篇：</span> <a href="gsdt0378.html" class="pre_link" target="_blank">石墨粉的材料特性是什么？</a>  </div> <div id="by64r9nm" class="next"> <span>下一篇：</span> <a href="gsdt0376.html" class="next_link" target="_blank">石墨粉的粒度數(shù)據(jù)分布的測(cè)定不同供應(yīng)商是什么？</a>  </div> </div> </main> <div id="by64r9nm" class="footer"> 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