Thermal desorption mill

K-absorption spectrum of yttrium in YH3, which was mechanically treated in a ball planetary mill during 20 min. with angular rate of 1630 rot./min. is shown in Fig. 6 (c). This absorption spectrum, as seen from the picture, is shifted relatively to the spectrum of untreated YH3 hydride to the side of lower energies, which in accordance with the found out correlation has to testify to thermal stability of reduction of treated yttrium hydride. Actually, we determined by the method of hydrogen thermal desorption, that as a result of mechanic dispersing of this hydride its temperature of decomposition decreased more than on 300 °C (Fig. 7), i.e. the... 

Preparation Grinding and Cutting of Plastics Increase the surface area via ball mills/cutting mills - ambient or cryogenic temperature. Suitable for liquid/solid and thermal desorption methods. (2)... 

Ozel, M.Z. Gogus, F. Lewis, AC. (2006). Comparison of direct thermal desorption with water distillation and superheated water extraction for the analysis of volatile components of Rosa damascena Mill, using GCxGC-TOF/MS. Analytica Chimica Acta, Vol.566, pp. m- T7, ISSN 0003-2670... 

Thermal aetivation by desorption/absorption cycling at elevated temperatures of premilled MgH reverts some of the microstructural changes induced by milling. ABCR powders initially milled, as shown in Fig. 2.13, were subjeeted to the following eyeling heating to 325°C for 15 min under 3.4 MPa to prevent desorp-... 

Perhaps of more general applicability for the study of the properties of positronium is its production by the desorption of surface-trapped positrons and by the interaction of positrons with powder samples. According to equation (1.15) it is energetically feasible for positrons which have diffused to, and become trapped at, the surface of a metal to be thermally desorbed as positronium. The probability that this will occur can be deduced (Lynn, 1980 Mills, 1979) from an Arrhenius plot of the positronium fraction versus the sample temperature, which can approach unity at sufficiently high temperatures. The fraction of thermally desorbed positronium has been found to vary as... 

Mills Jr., A.P. and Pfeiffer, L. (1979). Desorption of surface positrons a source of free positronium at thermal velocities. Phys. Rev. Lett. 43 1961-1964. 

---