DEVELOPMENT OF A HIGH TEMPERATURE LIQUID METAL SOLUTION CALORIMETER.
Abstract
The object of this project was to design and construct a liquid metal solution calorimeter capable of ooerating at temperatures up to 1300 C. A variety of solvents, including tin, uranium, lanthanum, glasses, and certain organic salts can be used, permitting thermodynamic analysis of nearly all alloys and many inorganic compounds, including such materials as steels, refractory metal alloys, carbides, borides, and silicides. Because of the high temperatures involved, interior parts are made of refractory metals and ceramics. A block of beryllia is employed as a heat sink, and high purity alumina is used for other parts. Heat is supplied through molybdenum wire resistance windings and controlled by a proportioning controller. Temperatures are measured with W-3% Re vs. W-25% Re thermocouples. A 48-junction thermopile of the same material detects temperature changes in the solvent bath due to solution of a sample; resulting signal is amplified and recorded automatically. Insulation composed of alternate layers of nickel foil and Fibrefrax paper, which, like the remainder of the calorimeter, operates in vacuum, helps reduce the size of the apparatus. A semi-automatic system for insertion and removal of the bath permits such operations without breaking vacuum or reducing the calorimeter temperature. Samples can be dropped from temperatures ranging from -195 to 1200 C, in either vacuum or inert gas atmosphere. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1966
- Accession Number
- AD0803910
Entities
People
- J. Richard Guadagno
- Monte J. Pool
Organizations
- Denver Research Institute