WorldCat Identities

Zavitsanos, P. D.

Overview
Works: 12 works in 15 publications in 1 language and 102 library holdings
Publication Timeline
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Publications about  P. D Zavitsanos Publications about P. D Zavitsanos
Publications by  P. D Zavitsanos Publications by P. D Zavitsanos
Most widely held works by P. D Zavitsanos
Coal desulfurization using microwave energy by N.C.) Industrial Environmental Research Laboratory (Research Triangle Park ( Book )
3 editions published between 1978 and 1979 in English and held by 89 WorldCat member libraries worldwide
Coal desulfurization by a microwave process ( Book )
1 edition published in 1981 in English and held by 2 WorldCat member libraries worldwide
The Second European Symposium on the Time-of-Flight Mass Spectrometer, University of Salford, England, July 1969 by European Symposium on the Time of Flight Mass Spectrometer ( Book )
1 edition published in 1970 in English and held by 2 WorldCat member libraries worldwide
Investigation of Group IV-A Metal Vapor Generation and Flux Behavior ( )
2 editions published between 1977 and 1978 in English and held by 2 WorldCat member libraries worldwide
The results of this work constitute a portion of a study investigating the potential of several Group IV-A metal oxides, such as SnO* for producing an electronic transition (visible) chemical laser via the oxidation of metal atoms by N2O. The vapor composition of Sn, Ge and Si was investigated by high temperature mass spectrometry up to temperatures where the respective vapor pressures reached one torr or higher. In the case Sn and Si, 95% and 90%, respectively of the vapor exists in the atomic form; the rest exists in the form of dimers, trimers, and tetramers. The germanium vapor consists of 98% atomic species and traces of Ge2. The reaction between titanium and boron was utilized to demonstrate the generation high density tin vapor. Emission spectra of the Sn/N2O system (where Sn was generated by RF heating and/or via the Ti/B reaction) suggest that the intensity of the green system SnO is reduced with increasing density of tin vapor
Experimental study of the sublimation of graphite at high temperatures ( Book )
1 edition published in 1969 in English and held by 1 WorldCat member library worldwide
COAL DESULFURIZATION USING MICROWAVE ENERGY by U.S ( Book )
1 edition published in 1978 in English and held by 1 WorldCat member library worldwide
Nuclear effects simulation : thermal effects by P. D Zavitsanos ( Book )
1 edition published in 1986 in English and held by 1 WorldCat member library worldwide
THE VAPORIZATION OF PYROLYTIC GRAPHITE ( Book )
1 edition published in 1966 in English and held by 1 WorldCat member library worldwide
The vaporization of pyrolytic graphite was studied by the Knudsen effusion and Langmuir free vaporization techniques using a microbalance and a time-of-flight mass spectrometer. Vapor pressures were obtained in the temperature range 2417K - 2700K for C, C sub 2, and C sub 3; respective heats of vaporization were calculated by the third-law method. Langmuir vaporization measurements were carried out in the temperature range 2250K - 2760K. The ratios of vaporization coefficients obtained from mass spectroscopic measurements are: alpha sub 2/alpha sub 1 = 2.1, alpha sub 1/alpha sub 3 = 10.6. Use of vapor pressure data and vaporization rates was made to arrive at an overall vaporization coefficient equal to 0.095 and individual values of alpha sub 1 = 0.24, alpha sub 2 = 0.50 and alpha sub 3 = 0.023. (Author)
THE VAPOR PRESSURE OF BARIUM ( )
1 edition published in 1968 in English and held by 1 WorldCat member library worldwide
The vapor pressure and the heat of vaporization of barium were measured using the Knudsen target technique. A recording microbalance was used to measure both the effusion rate and the recoil force exerted by the beam onto the target. The measured vapor pressure may be presented by log P(atm) = 5.145 - 9597/T. Mass spectrometric investigation was conducted with the time-of-flight mass spectrometer which produced a second-law heat of vaporization
Redefinition and improvement of metal vapor release technology by P. D Zavitsanos ( Book )
1 edition published in 1977 in English and held by 1 WorldCat member library worldwide
Study of Laser Effects on Heat Shield Materials ( Book )
1 edition published in 1979 in English and held by 1 WorldCat member library worldwide
Materials of the type used for heat shields on re-entry vehicles undergo varying degrees of property and characteristic changes as a result of exposure to laser radiation in a space type environment at flux levels ranging from about 1 watt/sq cm up to flux levels in excess of 10,000 watts/sq cm. These changes are, in general: (a) outgassing and depolymerization of the resin binder at low heat fluxes with potential loss in strength and/or delamination of the shield; (b) surface charring and high rates of outgassing and material decomposition/vaporization at intermediate heat fluxes and; (c) excessive rates of outgassing and material vaporization and shield thickness reduction at high heat fluxes. Thus a re-entry vehicle heat shield exposed to laser radiation in a space environment may provide inadequate protection during entry for reasons of reduced structural capability or inadequate remaining shield thickness. Also the heat soak into the shield and structure resulting from exposure times of several minutes may result in unacceptably high levels of temperature for the vehicle substructure or payload prior to or during entry
High temperature vaporization studies using a recording microbalance and electron bombardment heating by P. D Zavitsanos ( Book )
1 edition published in 1963 in English and held by 0 WorldCat member libraries worldwide
 
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Languages
English (15)