Argon construction materials

Lithium/carbon cells are typically made as coin cells. The lithium/carbon coin cell consists of several parts, including electrodes, separator, electrolyte and cell hardware. To construct a coin cell, we first must prepare each part separately. Successful cells will lead to meaningful results. The lithium/carbon coin cells used metallic lithium foil as the anode and a carbonaceous material as the cathode. The metallic lithium foil, with a thickness of 125 pm, was provided by Moli Energy (1990) Ltd.. Idie lithium foil is stored in a glove-box under an argon atmosphere to avoid oxidation. 

Figure 10-3 shows the basic features of a hollow cathode lamp source. Here A is the anode (the plus electrode) and C is the cathode, terminated in the lamp as a hollow cup. The anode can be a wire, such as tungsten, and the cathode cup may be constructed from the element whose spectrum is desired or it may be an inert material into which the desired element or a salt of the desired element is placed. The lamp envelope is made of glass and IT is a window of suitable properties. If an ultraviolet line spectrum is desired, the window may be quartz or a high silica glass. The hollow cathode has an inert gas present, usually neon or argon, at low pressure. 

Voor and co-workers constructed a Raman microprobe around an existing microscope and Raman spectrograph [5]. The system is suitable for undergraduate research and is also used in advanced materials science instruction. The system is assembled from a small argon ion laser and an epi-illumination microscope designed for materials inspection. The instrument design, shown in Fig, 1, is straightforward and could be built by most chemistry or physics faculty members. Instructors who intend to build their own Raman microprobes should remember to remove or to disable and cover the binocular eyepieces that are components of most microscopes. 

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