Accession Number : AD0785136
Title : Vaporization Kinetics and Thermodynamics of Graphite Using the High Pressure Mass Spectrometer.
Descriptive Note : Final technical rept. 1 Jul 68-15 Oct 73,
Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO
Personal Author(s) : Milne,Thomas A. ; Beachey,Jacob E. ; Greene,Frank T.
Report Date : MAY 1974
Pagination or Media Count : 224
Abstract : An apparatus for producing and sampling graphite vapor was developed and studies of the vaporization of graphite were performed. An all-graphite Knudsen cell was heated to about 3300K in vacuum without significant heating of the beam system walls or occurrence of objectionable outgassing. A continuously operating vacuum viewport and automatic pyrometer system allowed temperature monitoring under rapid window darkening conditions produced during vaporization runs. An extensive experimental determination of the neutral time-of-flight behavior of both carbon and low temperature gaseous species was done. Various ionic carbon clusters are identified. Experimental design and equipment are discussed. (Modified author abstract)
Descriptors : *Graphite, *Vaporization, *Mass spectroscopy, Ions, Ionization, Vapors, Reaction kinetics, Chemical equilibrium, Laboratory equipment, Experimental design, Computer programs, Molecular beams, Mass spectra, Spectrum analysis, Ion sources, Pyrolytic graphite, Electric furnaces
Subject Categories : Ceramics, Refractories and Glass
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE