Ditmars D A, Ishihara S, Chang S S, Bernstein G, West E D
National Bureau of Standards, Washington, DC 20234.
Calorimetrics, Inc., P.O. Box 4146, Boulder, CO 80302.
J Res Natl Bur Stand (1977). 1982 Mar-Apr;87(2):159-163. doi: 10.6028/jres.087.012.
Heretofore unpublished enthalpy data which were used in the derivation of smooth enthalpy and heat-capacity data for NBS SRM 720 (α-AlO, heal eapacily and enthalpy standard) are presented along with some details of the high-temperature experiments. Recent NBS low-temperature measurements on SRM 720 are smoothed by a least-squares spline technique and a revised table of certified values for enthalpy and heal capacity of α-AlO from 10 K to near the melting point (2250 K) is presented.
本文给出了此前未发表的焓数据，这些数据用于推导NBS SRM 720（α - AlO，热容和焓标准物质）的平滑焓和热容数据，并介绍了高温实验的一些细节。近期NBS对SRM 720进行的低温测量通过最小二乘样条技术进行了平滑处理，并给出了α - AlO从10 K到接近熔点（2250 K）的焓和热容认证值的修订表。
