Thermodynamics of bismuth-sulfur-water system

Wang Chengyan and Qiu Dingfan calculated the E-pH diagram of the Bi 2 S 3 -H 2 O system at room temperature using the thermodynamic data of the materials provided in the literature. See Figure 1.

Fig.1 Bi(III)-S-H 2 O system potential-pH diagram

The corresponding chemical equations and equilibrium equations in the figure are as follows:

Figure 1 indicates that Bi 2 S 3 can be leached by oxidation of an oxidant having a standard redox potential higher than 0.499V. The iron dichloride has an EFe 3 + /Fe 2 + = 0.771 V, and the chlorine gas has an EC1 2 ∕Cl − =1.35 V, and both of the Bi 2 S 3 can be oxidized and leached.

Plano-concave cylindrical lenses provide uni-axial negative imaging for anamorphic beam expansion and a wide range of applications.Plano-concave lens is the most common item used for light projection and beam expansion. Coated with antireflective coatings, lenses are used in various optical systems, lasers and assemblies. Catalog items list consist of most common diameter and focal length uncoated lenses made from BK7; UVFS; CaF2 and ZnSe.



concave cylindrical lens

Plano Concave Cylindrical Lens

Plano Concave Cylindrical Lens,Glass Plano Concave Cylindrical Lens,Convex-Concave Meniscus Lenses,Cylindrical Lens Double Convex

Changchun Ruiqi Optoelectronics Co.,Ltd , http://www.ruiqi-optics.com