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<div class="para_BTDPO summary_SV8jo MARK_MODULE" data-tag="paragraph" data-uuid="gnteb216z8" data-idx="" style="box-sizing: content-box; margin: 0px 0px 15px; padding: 0px; overflow-wrap: break-word; zoom: 1; clear: both; color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; text-indent: 28px; font-family: &quot;Helvetica Neue&quot;, Helvetica, Arial, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei&quot;, &quot;WenQuanYi Micro Hei&quot;, sans-serif;"><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">氧化铝(aluminum oxide)是一种无机物，化学式Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">，是一种高硬度的化合物，熔点为2054℃，沸点为2980℃，在高温下可电离的</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;"><a class="innerLink_KIDWK" href="https://baike.baidu.com/item/%E7%A6%BB%E5%AD%90%E6%99%B6%E4%BD%93/1838475?fromModule=lemma_inlink" target="_blank" data-from-module="summary" style="box-sizing: content-box; margin: 0px; padding: 0px; color: rgb(19, 110, 194);">离子晶体</a></span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">，常用于制造耐火材料。</span></div><div class="para_BTDPO summary_SV8jo MARK_MODULE" data-tag="paragraph" data-uuid="gnteb2170w" data-idx="" style="box-sizing: content-box; margin: 0px 0px 15px; padding: 0px; overflow-wrap: break-word; zoom: 1; clear: both; color: rgb(51, 51, 51); font-size: 14px; line-height: 24px; text-indent: 28px; font-family: &quot;Helvetica Neue&quot;, Helvetica, Arial, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei&quot;, &quot;WenQuanYi Micro Hei&quot;, sans-serif;"><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;"><a class="innerLink_KIDWK" href="https://baike.baidu.com/item/%E5%B7%A5%E4%B8%9A%E6%B0%A7%E5%8C%96%E9%93%9D/9078796?fromModule=lemma_inlink" target="_blank" data-from-module="summary" style="box-sizing: content-box; margin: 0px; padding: 0px; color: rgb(19, 110, 194);">工业氧化铝</a></span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">是由</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;"><a class="innerLink_KIDWK" href="https://baike.baidu.com/item/%E9%93%9D%E7%9F%BE%E5%9C%9F/10449936?fromModule=lemma_inlink" target="_blank" data-from-module="summary" style="box-sizing: content-box; margin: 0px; padding: 0px; color: rgb(19, 110, 194);">铝矾土</a></span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">（Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">·3H</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O）和</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;"><a class="innerLink_KIDWK" href="https://baike.baidu.com/item/%E7%A1%AC%E6%B0%B4%E9%93%9D%E7%9F%B3/10849489?fromModule=lemma_inlink" target="_blank" data-from-module="summary" style="box-sizing: content-box; margin: 0px; padding: 0px; color: rgb(19, 110, 194);">硬水铝石</a></span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">制备的，对于</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;"><a class="innerLink_KIDWK" href="https://baike.baidu.com/item/%E7%BA%AF%E5%BA%A6/533912?fromModule=lemma_inlink" target="_blank" data-from-module="summary" style="box-sizing: content-box; margin: 0px; padding: 0px; color: rgb(19, 110, 194);">纯度</a></span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">要求高的Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">，一般用化学方法</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;"><a class="innerLink_KIDWK" href="https://baike.baidu.com/item/%E5%88%B6%E5%A4%87/9490029?fromModule=lemma_inlink" target="_blank" data-from-module="summary" style="box-sizing: content-box; margin: 0px; padding: 0px; color: rgb(19, 110, 194);">制备</a></span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">。Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">有许多同质异晶体，已知的有10多种，主要有3种晶型，即α-Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">、β-Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">、γ-Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">。其中结构不同性质也不同，在1300℃以上的高温时几乎完全转化为α-Al</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">2</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">O</span><span class="text_G9Iim sub_ig4Ai" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; bottom: -0.25em;">3</span><span class="text_G9Iim" data-text="true" style="box-sizing: content-box; margin: 0px; padding: 0px; position: relative;">。</span></div>