✦ LIBER ✦

Preliminary experiments on the Simon desorption method between temperatures of 90° and 40°K

✍ Scribed by A. Van Itterbeek; W. Vereycken

Publisher: Elsevier Science
Year: 1936
Weight: 269 KB
Volume: 3
Category: Article
ISSN: 0031-8914
DOI: 10.1016/s0031-8914(36)80373-5

No coin nor oath required. For personal study only.

✦ Synopsis

The construction is described of a Simon-desorption apparatus for temperatures between 90°1( and 40°1(, in which use is made of a great quantity of charcoal (169,2 gr., volume 367 em'). Starting from 90°1( a lowering of temperature by desorption of about 23°1( is found. starting from 65°1(, a lowering of 20°1(. Besides, preliminary measurements are carried out on the influence of equilibrium pressure on desorption heat. These measurements indicate, that, in order to obtain an important lowering of temperature, it is advantageous to, work with high pressures.

📜 SIMILAR VOLUMES

Further experiments on the simon desorpt

Further experiments on the simon desorption method between temperatures of 90° and 40°K (influence of equilibrium pressure)

✍ A. Van Itterbeek; W. Vereycken 📂 Article 📅 1936 🏛 Elsevier Science ⚖ 261 KB

Determination of adsorption isotherms of

Determination of adsorption isotherms of hydrogen on charcoal between 90 °k and 50 °k, in connection with desorption experiments

✍ A. vanItterbeek; W. van Dingenen 📂 Article 📅 1937 🏛 Elsevier Science ⚖ 591 KB

Measurements on the viscosity of argon g

Measurements on the viscosity of argon gas at room temperature and between 90° and 55°K

✍ A. van Itterbeek; O. van Paemel 📂 Article 📅 1938 🏛 Elsevier Science ⚖ 143 KB

The viscosity of argon gas was determined at room temperature and at 11 temperatures obtained with liquid oxygen and solid nitrogen. In the low temperature region, the viscosity can be represented by means of the following formula: ~q = ~190(T/90) 0.a8a, with ~90 = 759-2.10 -7. It was not possible

Some experiments on the influence of sur

Some experiments on the influence of surface treatment on the Kapitza conductance between copper and He4 at temperatures from 1.2 to 2.0 k

✍ E.A. Jones; J.C.A. van der Sluijs 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 715 KB

This paper reports on some experiments on the influence of a number of methods of surface treatment on the Kapitza conductance between copper and He 4 at not very low temperatures. Attention is paid to the magnitude, the temperature dependence, and the reproducibility between different samples. The

Heat capacities of liquids at temperatur

Heat capacities of liquids at temperatures between 90 and 300 K and at atmospheric pressure I. Method and apparatus, and the heat capacities of n-heptane, n-hexane, and n-propanol

✍ B. Kalinowska; J. Jedlinska; W. Wóycicki; J. Stecki 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 338 KB

Oxygen interaction of CdS-based gas sens

Oxygen interaction of CdS-based gas sensors with different stoichiometric compositions was studied by X-ray photoelectron spectroscopy (XPS) and thermal-desorption mass spectroscopy observations combined with conductivity measurements. Three different types of film with different atomic ratios of Cd/S were used in the study of oxygen chemisorption in a low-temperature range between 300 and 570 K. Spray pyrolysis was used for the deposition of the films on glass substrates; XPS and energy dispersive spectroscopy of X-ray together with atomic force microscopy and scanning electron microscopy were used for the characterization of the composition and structure of the films. It was possible to distinguish different temperature ranges for the thermal desorption of the different adsorbed oxygen species. A comparison of the data from XPS and mass-spectroscopy observations with conductance measurements allows to conclude that metallic surface atoms are responsible for different interactions of oxygen species with CdS surfaces.

📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 379 KB