顶杆法膨胀仪的研制及不确定度分析  

Development and Uncertainty Analysis of Push-Rod Dilatometer

作　　者：杨阳[1] 徐辉[1] 邓建兵[1] 

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2014年第6期68-70,共3页Aerospace Materials & Technology

摘　　要：研制了一套顶杆法膨胀仪,用于测试室温～ 500℃固体材料的平均线胀系数.利用该套膨胀仪对SRM732进行测试,并与美国国家标准与技术研究院提供的标准数据比较,相对误差小于2％.以SRM732测试结果为基础,进行不确定度分析,该套膨胀仪的测试不确定度小于3.2％.Push-rod dilatometer has been developed for measuring linear thermal expansion coefficients of solid materials for thermal expansion from the room temperature to 500℃. The linear thermal expansion coefficients of sin- gle-crystal sapphire have been determined using the Push-rod dilatometer. The present data are compared with the＇da- ta recommended by the National Institute of Standards and Technology （NIST） , which are in good agreement, The relative uncertainty in the measurement was estimated to be less than 4% in the temperature range, based upon the data of single-crystal sapphire.

关 键 词：顶杆法膨胀仪 蓝宝石标样 不确定度 

分 类 号：TB302.1[一般工业技术—材料科学与工程]