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      瞬态平面热源法测定微晶玻璃陶瓷的导热系数
      2013-10-29 11:19:32

      实验器材

      DZDR-S型导热系数测定仪一台  微晶玻璃陶瓷两块 

           


      实验过程及分析

      瞬态平面热源法是研究热传导性能中精确、方便、快速的一种方法。它是一?#20013;?#25216;术,在研究材料时能够快速准确的测量热导率。该方法采用双螺旋结构的平面探头,用合金薄片刻蚀而成。测量时,平面探头要放置在两个样?#20998;?#38388;,探头既是热源,又是传感器。

       
                                                                                          
        
      测试时间4-160s左右可?#25105;?#35774;置,该实验选择40秒的测试时间。样品不需要特别的制备,对样品形状也无特殊要求,只需相对平滑的样品表面并且满足长宽至少为探?#20998;?#24452;的两倍即可,该探?#20998;?#24452;15mm。实验选择两个形状为长方体的样品。

      测试时把探头放置在两个样品平面之间,打开测试软件和主机,选择好通讯端口,按材料类型在主机上选择不同的测试条件,最后点击仪器屏幕上“开始测试?#20445;?#20202;器测试结束时,电脑上的测试软件导入数据,数据传输结束后,根据实验需要分析处理数据,得到实验结果(探头不能空烧,另外重复实验时,前后时间间隔不能少于30分钟)。经过软件分析处理最终实验结果为1.75w/m.k


       

           


         
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