Zinc phase diagrams

Magnesium (Mg), 15 320-381. See also Aluminum— magnesium phase diagram Aluminum-magnesium- zinc phase diagram MgB2 entries activated, 12 835 analytical methods for, 15 348 atmospheric exposures of, 15 369 beer as dietary source of, 3 588 behavior on contact with chemicals, 15 372t... 

Aluminum—magnesium—zinc phase diagram Magnesium—zinc phase... 

The binary oxygen-zinc phase diagram is depicted in Fig. 1.5 [58]. Above 200°C only the binary compound ZnO is stable. At low temperatures also zinc peroxide (ZnO2) is reported, which can be prepared by chemical synthesis [59]. The melting point of ZnO is 1975°C. The sublimation of ZnO occurs congruently by decomposition to the gaseous elements according to ... 

Cramer, E.M., F.H. Ellinger and C.C. Land, 1960, Plutonium-Zinc Phase Diagram, in Extractive and Physical Metallurgy of Plutonium and its Alloys, ed. W.D. Wilkinson (Interscience Publishers, New York) pp. 169-180. 

Figure 9.21 A region of the copper-zinc phase diagram that has been enlarged to show eutectoid and peritectic invariant points, labeled E (560°C, 74 wt% Zn) and P (598°C, 78.6 wt% Zn), respectively.

The most common copper alloys are the brasses, for whieh zine, as a snbstitntional impurity, is the predominant alloying element. As may be observed for the eopper-zinc phase diagram (Figure 9.19), the a phase is stable for eoneentrations up to approximately 35 wt% Zn. This phase has an FCC crystal structure, and a-brasses are relatively soft, ductile, and easily cold worked. Brass alloys having a higher zinc content contain both a and p phases at room temperature. The P phase has an ordered BCC crystal structure and is harder and stronger than the a phase consequently, a + p alloys are generally hot worked. 

Phase diagrams have been measured for almost any alloy system you are likely to meet copper-nickel, copper-zinc, gold-platinum, or even water-antifreeze. Some... 

Figure A1.19 shows the phase diagram for the copper-zinc system. It is more complicated than you have seen so far, but all the same rules apply. The Greek letters (conventionally) identify the single-phase fields. 

The copper-zinc system (which includes brasses) has one eutectoid reaction. Mark the eutectoid point on the phase diagram (Fig. A 1.38). 

Phase diagram studies of the magnesium-al uminum-zinc system have shown that there exists a ternary phase, which has been given the name A phase or T phase (Egar, 1913 Koster Wolf, 1936 Koster ... 

No chalcogenide halides of zinc and cadmium are known. The phase diagrams of CdS-CdCl (7, 198, 210), CdSe-CdCl (220, 314), CdTe-CdClj 368), CdTe-CdBr2 (368), and CdTe-Cdl (323) are of a simple, eutectic type. The system CdS-CdCl shows a range of solubility of CdS in solid CdClj that extends to 5% of CdS at room temperature, and increases to a maximum of 12.5% of CdS at 500°C (7,210). 

Sodium-zinc alloys for phase diagram determination are prepared by melting the elements in glass tubes under H2- Samples of NaZujj are prepared by heating zinc for several hours above the melting point of NaZn,3 (557°C) with xs Na in alundum extraction thimbles with N2 or Ar in a steel bomb scaled with copper gaskets. Excess Na was removed by extraction with liq NHj. Both KZn,3 and KCd,2 were prepared in this manner. ... 

Early workers, and some later ones, ignored the fact that aluminium is always found in the orthophosphoric acid liquid of the practical cement its presence profoundly affects the course of the cement-forming reaction. It affects crystallinity and phase composition, and renders deductions based on phase diagrams inappropriate. Nevertheless we first describe the simple reaction between zinc oxide and pure orthophosphoric acid solution, which was the system studied by the earliest workers. 

Terrey (1950). In the case of the simple zinc oxide-orthophosphoric add system, but only for this simple system, these phase-diagram arguments are valid. 

Abstract In the beginning, the mixed potential model, which is generally used to explain the adsorption of collectors on the sulphide minerals, is illustrated. And the collector flotation of several kinds of minerals such as copper sulphide minerals, lead sulphide minerals, zinc sulphide minerals and iron sulphide minerals is discussed in the aspect of pulp potential and the nature of hydrophobic entity is concluded from the dependence of flotation on pulp potential. In the following section, the electrochemical phase diagrams for butyl xanthate/water system and chalcocite/oxygen/xanthate system are all demonstrated from which some useful information about the hydrophobic species are obtained. And some instrumental methods including UV analysis, FTIR analysis and XPS analysis can also be used to investigated sulphide mineral-thio-collector sytem. And some examples about that are listed in the last part of this chapter. 

Silicon is soluble in aluminum in the solid state to a maximum of 1.62 wt % at 577°C (2). It is soluble in silver, gold, and zinc at temperatures above their melting points. Phase diagrams of systems containing silicides are available (2,3). 

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