1965•Journal of Research of the National Bureau of Standards Section C Engineering and InstrumentationOpen access
An adiabatic calorimeter for the range 10 to 360 °K
K. F. Sterrett, Douglas H. Blackburn, A. B. Bestul, Shu‐Sing Chang, J. Horman
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Abstract
A low te mperature adiabatic calorimeter and cryostat assembl y is d esc ribed for meas-Ul'ing heat capacit ies in t he te mperature range 10 to 360 oK.A combination of D ewar a nd tank system is used as refrigerant co ntainers.Th e te mperature of t he adia batic shi eld is a utomatically co ntrolled to within a millidegree of t hat of the c" lorimeter vessel.This a ppa rat us offe rs hLCiliti es for rapid cooling to a bout 50 oK and long term a diabatic control for conditionin g of a sa mple and, t hus, is esp ecially sui table for m eas urements on glass, where long eq uilibration t ime is so meti mes involved.D ata on t he empty calorimeter vessel a nd on the Ca,lorimetr y Conference standard sample of sy nt hetic sapp hire a rc presented as a m eas ure of t he precision a nd t he acc uracy of t he a ppa rat us.
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