线膨胀系数测量过程中的误差分析  

Error analysis of the linear expansion coefficient during the measurement process

作　　者：贺传兰[1] 王维新[1] HE Chuan-lan WANG Wei-xin(Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China)

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《物理测试》2017年第1期25-28,共4页Physics Examination and Testing

基　　金：国家自然科学基金(11372292);中国工程物理研究院发展基金(2013A0203006)

摘　　要：系统分析了卧式单顶杆线膨胀仪在测量过程中影响平均线膨胀系数测量值的因素,测试误差来源有以下几个方面:影响温度变化的因素,包括炉门密封不良、无温度补偿功能以及初始温度平衡时间不够等;影响热膨胀量准确测量的因素,包括顶杆倾斜、试样端面与试样轴线不垂直、恒温水循环系统不正常或循环时间不够、样品室不水平等;影响试样初始长度准确测量的因素,包括环境温、湿度及量具的精度等,并提出了减小测试误差的注意事项和方法。The factors affecting the measurement of the mean linear expansion coefficient using the horizontal singleline jack dilatometer were systematically analyzed.And the test error sources were in the following areas：the factors affecting the temperature changes,including the bad sealing condition of the furnace door,no temperature compensation function,and the lack of the initial temperature equilibrium time;the factors affecting the accurate measurement of the thermal expansion,including the ejector pins were inclined,the sample was not perpendicular to the axis,the constant temperature water circulation system was not normal or cycle time was not enough,the sample chamber was not level,etc.;the factors affecting the accurate measurement of the initial length,including the ambient temperature,humidity,and precision measuring tools and so on.And the notice and method which can reduce the measuring error were put forwards.

关 键 词：线膨胀系数 误差分析 石英 

分 类 号：O551.3[理学—热学与物质分子运动论]