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在结晶工艺中常见的主要有质量密度计和差压密度计两种密度测量方法。
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以上两种仪表在测量过程中都存在着一些问题，江苏1分快三计划科技股份有限公司研发的XC-CA超声波密度计因其不仅可直接测量晶浆密度，而且测量精度、产品寿命、管路结构克服了以上两款仪表存在的一些缺点，获得不少结晶工艺技术人员的认可。
以往工况都是通过密度指标控制工艺，其虽与固含量有一定对应关系，但并不完全一致，而密度值并不是影响工艺质量的直接指标，直接指标是晶浆固含量，XC-CA超声波密度计可直接测出晶浆固含量，并可切换质量固含量、体积固含量和密度显示，有效控制工艺进程。
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