Kinetic and Experimental Basis of Flash Desorption

Journal of Applied Physics - Tập 32 Số 1 - Trang 4-15 - 1961
Gert Ehrlich1
1General Electric Research Laboratory, Schenectady, New York

Tóm tắt

Techniques are developed for deriving both qualitative and quantitative information on the kinetics of gas desorption from measurements at continuously changing temperature. First- and second-order processes can be distinguished immediately by the constancy of the end point of the former. Quantitative values for activation energy and frequency factors are deduced from the experimental time-temperature curve and the instantaneous slopes of the evolution curve, even for systems with concentration-dependent rate parameters. It is shown that for multiple desorption peaks, qualitative detection is simplified by slow heating, but may result in interconversion. The experimental basis of desorption measurements using the Bayard-Alpert gauge is also analyzed, together with artifacts arising from negative pressures, bistable gauge operation, formation of new species in the gauge, and the delay in sensing density pulses transmitted through tubes.

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Tài liệu tham khảo

1930, Sitzber. Akad. Wiss. Wien, Math.-Naturw. Kl. Abt. IIa, 139, 363

1955, J. Electrochem. Soc., 102, 490, 10.1149/1.2430129

1951, J. Appl. Phys., 22, 1012, 10.1063/1.1700093

1956, Australian J. Phys., 9, 425, 10.1071/PH560425

1956, J. Phys. Chem., 60, 1388, 10.1021/j150544a014

1958, J. Phys. Chem. Solids, 5, 47, 10.1016/0022-3697(58)90131-8

1958, J. Phys. Chem., 62, 684, 10.1021/j150564a011

1961, J. Chem. Phys., 34, 29, 10.1063/1.1731581

1958, Tech.-Wiss. Abhandl. Osram-Ges., 7, 175

1957, Nature, 179, 1362, 10.1038/1791362a0

1959, J. Phys. Chem., 63, 307

1957, J. Appl. Phys., 28, 1149, 10.1063/1.1722595

1951, J. Sci. Instr., 28, 278, 10.1088/0950-7671/28/9/306

1945, Phys. Rev., 68, 278

1953, J. Appl. Phys., 24, 860, 10.1063/1.1721395

1956, J. Chem. Phys., 24, 1263

1957, J. Appl. Phys., 28, 1027, 10.1063/1.1722901

1958, J. Appl. Phys., 29, 1162, 10.1063/1.1723394

1960, J. Appl. Phys., 31, 128, 10.1063/1.1735387

1957, Phys. Rev., 107, 994, 10.1103/PhysRev.107.994

1955, J. Chem. Phys., 23, 1543, 10.1063/1.1742349

1959, Brit. J. Appl. Phys., 10, 364, 10.1088/0508-3443/10/8/306

1959, Vakuum-Tech., 8, 171

1930, Phys. Rev., 35, 478, 10.1103/PhysRev.35.478

1921, Ann. Physik, 64, 401

1930, Ann. Physik, 7, 489

1932, Ann. Physik, 12, 961

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Thông tin xuất bản

Journal of Applied Physics

Tập 32 Số 1

4-15

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