研究建立300～67OK固体比热容国家基准——标准物质α-Al_2O_3的摩尔热容  

Establishment of Primary Heat Capacity Standard for the Range of 300 to 670 K——Molar Heat Capacity of α-Alumina

作　　者：贺锡蘅[1] 黄成礼[2] 高峰 黄新生 李少锋 于宝庆 迟绯 高佩珍 陈朝晖 何伟仁 

机构地区：[1]国家标准物质研究中心 [2]中国计量科学研究院工艺研究所

出　　处：《计量学报》1992年第1期6-12,共7页Acta Metrologica Sinica

摘　　要：本文报告300～670K比热容基准的建立和研制的高精度中温绝热热量计的结构、特点、性能及对标准物质α-Al_2O_3摩尔热容的测定结果。在300～670K温度范围内,空当量测定精度为0.02%。对α-Al_2O_3样品热容测定精度为0.05%,总不确定度为0.15%。本基准测定的标准物质α-Al_2O_3摩尔热容舒平值与美国国家标准局发布的数据比较,在300～670K温度范围其一致性在0.1%以内。A primary heat capacity standard for the temperature range of 300 to 670K has been established.The structure,features and performance of the high precision adiabatic calorimeter and the certification of heat capacity of reference material a-alumina are described in this paper.The precision of measurement of heat capacity for empty calorimeter and a-alumina sample is 0.02% and 0.05%,respectively.The total uncertainty of the molar heat capacity for a-alumina is evaluated to be 0.15%.The smoothed data of the certified reference material a-alumina are in agreement with those of the NIST within ±0.1%.

关 键 词：热量计 比热容 固体 Α-AL2O3 测量 

分 类 号：TH811.1[机械工程—仪器科学与技术]