DOI: 10.1063/1.1742952. Mass Spectrometric Study of Gaseous Species in the B

Mass Spectrometric Study of Gaseous Species in the B–B2O3 System

10.1063/1.1742952

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

A combination of Knudsen effusion and mass spectrometric techniques have been employed in studying the species existing in the vapor in thermodynamic equilibrium with a condensed mixture of boron and boric oxide in the temperature range 1300°K to 1500°K. Positive ions were produced by electron bombardment of vapor effusing from the Knudsen cell and were analyzed mass spectrometrically. Ion currents of B+, BO+, B2O2+, and B2O3+ were observed. The mixture, B+B2O3, was shown to vaporize mainly as the gaseous molecule, B2O2. The heat of vaporization of B2O2(g) from the condensed phase is ΔH14000=94±8 kcal/mole. The ΔH00 for the reaction ⅔B(s)+⅔B2O3(g)→B2O2(g) is found to be 35.7±3.5 kcal. The BO+ and B+ ions observed were found to be formed mainly in processes of dissociative ionization. The concentration of BO(g) in the vapor is at least an order of magnitude lower than that of B2O2(g) showing the dimerization energy is greater than 99.6 kcal. Results obtained with pure B2O3 liquid in the Knudsen cell agree with earlier published work.

Bibliography

Inghram, M. G., Porter, R. F., & Chupka, W. A. (1956). Mass Spectrometric Study of Gaseous Species in the BâB2O3 System. The Journal of Chemical Physics, 25(3), 498â501.

Authors 3

Mark G. Inghram (first)
Richard F. Porter (additional)
William A. Chupka (additional)

References 13 Referenced 86

10.1021/j150524a009 / J. Phys. Chem. (1955)
10.1021/ja01162a065 / J. Am. Chem. Soc. (1950)
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{'key': '2024020816502905600_r4', 'first-page': '52', 'volume': '52', 'year': '1953', 'journal-title': 'Chem. Revs.'} / Chem. Revs. (1953)
{'key': '2024020816502905600_r5'}
10.1021/j150524a002 / J. Phys. Chem. (1955)
10.1063/1.1741963 / J. Chem. Phys. (1955)
10.1063/1.1740686 / J. Chem. Phys. (1955)
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Dates

Type	When
Created	20 years, 8 months ago (Jan. 5, 2005, 8:24 p.m.)
Deposited	1 year, 6 months ago (Feb. 8, 2024, 12:51 p.m.)
Indexed	1 week, 2 days ago (Aug. 29, 2025, 6:47 a.m.)
Issued	69 years ago (Sept. 1, 1956)
Published	69 years ago (Sept. 1, 1956)
Published Print	69 years ago (Sept. 1, 1956)

Funders 0

None

BibTeX

@article{Inghram_1956, title={Mass Spectrometric Study of Gaseous Species in the B–B2O3 System}, volume={25}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1742952}, DOI={10.1063/1.1742952}, number={3}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Inghram, Mark G. and Porter, Richard F. and Chupka, William A.}, year={1956}, month=sep, pages={498–501} }

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