Selenium alloy

Selenium is added up to 0.1% to silicon steels (2—4% Si) used in transformer cores to enhance the development of the secondary recrystallization texture which, in turn, improves the magnetic characteristics. Selenium alloying additions to the melt may be made as elemental Se, nickel—selenium, or ferroselenium. The recovery depends on the melting practice and method of addition. Normally, it is in the range of 66%, but may be as high as 90%. 

HP arsenic is used in the manufacture of photoreceptor arsenic-selenium alloys for xerographic plain paper copiers (see Electrophotography). The level of arsenic maybe 0.5%, 5.0%, or 35% present as arsenic triselenide [1303-36-2] As2Se2. 

SYNS C.I. 77805 COLLOIDAL SELENIUM ELEMENTAL SELENIUM SELEN (POLISH) SELENIUM ALLOY SELENIUM BASE SELENIUM DUST SELENIUM ELExMEKTAL SELENIUM HOMOPOLYMER SELENIUM METAL POWDER, NON-PYROPHORIC (DOT) VANDEX... 

VAS/NIK] Vasil ev, V. P., Nikol skaya, A. V., Gerasimov, Y. 1., Thermodynamic study of thallium-selenium alloys by the electromotive force method, Russ. J. Phys. Chem., 45, (1971), 1169-1170. Cited on page 251. 

JEL/KOM] Jelinek, H., Komarek, K. L., Thermodynamic properties of cobalt-selenium alloys, Monatsh. Chem., 105, (1974), 689-711. Cited on pages 317,318,541. 

Synonyms Registered trade name(s) Elemental selenium selenium base selenium dust colloidal selenium selenium homopolymerb selenium alloy C.l. 77805 VANDEXb Dihydrogen selenide hydrogen selenide [H2Se] selenium anhydride selenium dihydride selenium hydride selane Selenic acid, liquidD0Tb Monohydrated selenium dioxide selenous... 

Tellurium-selenium alloys Sodium selenate (NajSeOJ... 

Synonyms/Trade Names Elemental selenium, Selenium alloy... 

The manufacture and maintenance of drums used in photocopy machines involves use of a selenium alloy. The external manifestations of selenium exposure in this type of setting includes hair loss, deformity of nails, and discoloration of teeth. 

Part 6. Copper-bismuth and copper-bismuth-selenium alloys (high-strength and leaded high-strength yellow brasses) ... 

Figure 18.14 Fine globulitic cast structure (lead-2% anti-mony-0.02% selenium alloy). (a)Automotive grid (x200), (b) industrial grid (x200) (Courtesy of the Swiss Post Office. Bern)...

As can be seen in Figure 18.15, the potentiostatic corrosion rate is of a comparable order of magnitude for all tested antimonial lead alloys. On the basis of these experiments the selenium alloys can be expected to perform slightly better with regard to corrosion attack than conventional lead—antimony alloys. 

In Figure 18.18, results of floating tests on stationary batteries with selenium alloys are compared with tests published by the Swiss Post Office in 1976. For his well founded experiments, Gerber used industrial batteries supplied by several manufacturers. The grid material of these batteries contained about 10% antimony. Some results on stationary batteries equipped with lead—calcium alloys are also given in Figure 18.18. 

The cells used for the test shown inFigure 18.19 differed only in antimony content of the positive grid. The stabilizing effect of the antimony is obvious. While the cells without any antimony failed after about 200 cycles, the cells equipped with selenium alloy containing only 1.6% antimony performed about 1000 cycles. This stabilizing effect is obviously an important advantage of selenium alloys. Even for batteries that are not... 

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