Molybdenum foil

Molybdenum(III) Bromide. This compound is conveniently prepared from the elements in an apparatus such as that illustrated in Fig. 6. Bulbs A, B, E, and F are sections of 25-mm.-o.d. Vycor tubing joined together by sections of 15-mm.-o.d. tubing. Bulb B should be 2 to 3 in. long, and bulbs E each about 6 in. long. In a typical preparation, 3 g. of molybdenum foil (cut into small strips) is placed in B, and the apparatus... 

The dimensions and properties of the lamp envelope are based on the discovery that the volume of Hg is critical for the effective UV operation [43]. Higher Hg pressures result in the need to use higher MW power levels. To focus the MW field efficiently into the EDL a special Cd low-pressure lamp with a metal antenna (a molybdenum foil) was developed by Florian and Knapp [44],... 

The TRAPI was developed by Matsuoka and co-workers " and has been used to determine the rate constants of about a dozen IM reactions at atmospheric pressure. As a first approximation, the TRAPI experiment might be described as an atmospheric pressure version of the PHPMS with initial ionization caused by a pulsed X-ray source. The X-rays cause relatively even ionization throughout the 6.4-cm ion source volume by penetrating through thin sections of the ion source walls formed by 25- im thick molybdenum foil. A 16-pm ion-sampling aperture is located at the center of one of these thin walls. The ions that pass through this aperture are measured by an associated mass spectrometer as a function of time after the X-ray pulse. 

In another example, the high temperature reaction of calcium and strontium sub-nitrides with molybdenum foil has also recently been claimed to produce novel molybdenum ternary nitride oxides which contain isolated [MoN4] tetrahedra in an ordered sub-lattice of and anions. High temperature-high pressure syntheses are also yielding novel metastable structures, such as the spinel analogues mentioned previously. There is therefore an ever-increasing base of nitrides and oxynitrides with diverse structures and potential catalytic interest. 

Figure 23.1 XRD patterns (a) molybdenum foil, (b) molybdenum carbide, carburized at...

Ta30, Ta302 etc. These were clear single peaks because there is only one dominant isotope of tantalum. A molybdenum foil was also analyzed and this is shown in Figure 16. Molybdenum has seven dominant isotopes between 92 and 100 and the relative abundances seen in the spectrum is approximately equivalent to the isotope abundances. 

Figure 16. SIMS spectrum of a molybdenum foil taken on an HP 5995 Bench-Top MS.

The effluents mentioned are formed in the course of production of tungsten spirals used as filaments for electric bulbs, during the pickling of molybdenum foil, sheetmetal, or in other processes of molybdenum pickling. Tungsten spirals are made by coiling... 

Figure 88. Energy-dispersive X-ray spectrum of InAs (logarithmic scale of counts per channel) recorded by excitation with 30-keV electrons (E) and X-ray fluorescence (X) using the molybdenum K radiation excited in a molybdenum foil target in front of the specimen...

Because of the relatively small outer diameter of an NMR autoclave, the insulation separating the heating elements from the inner wall of the pressure vessel is of critical importance. This insulation must meet the conflicting requirements of low thermal conductivity and low permeabU-ity to convection in the pressure medium. In one scheme, the insulation consists of a layered structure formed by a roll of 0.025 mm molybdenum foil. The layers were separated with small spacing by 0.05 mm pimples embossed on the foil. With this insulation, a sample temperature of 1500 =C at 90 bar can be obtained with 450 W of DC power. A more efficient, but slightly more complex variation uses layers of molybdenum foil separated by thin sheets of alumina cloth. 

The choice of the incident energy is not critical for the determination of carbon in tungsten. It is however very important for the instrumental determination of carbon in molybdenum. Fig. V-1 gives relative thick target yields for the Mo(d,n) " Tc and Mo(d,p) Mo reactions as a function of the energy (55). These were determined by irradiation of a stack of molybdenum foils with 5 MeV deuterons. For comparison, the thick... 

Bunton et al. (1954, 1958c) analyzed methanol and other organic compounds by pyrolyzing them to carbon monoxide in a tube heated by an induction furnace (c. 1200 C.), and Cohn and Drysdale (1955) have analyzed very small quantities of barium phosphate (10-20 jitmoles, 6 mg.) by heating it with carbon (5 mg.) in a molybdenum foil held... 

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