About Cadmium Sulfide CdS Powder :
Cadmium sulfide is an inorganic substance with a chemical formula of CdS. There are two crystals, the α-form is a lemon yellow powder, and the β-form is an orange-red powder. Slightly soluble in water, soluble in acid, slightly soluble in ammonia. Cadmium sulfide is a yellow solid. It has two different crystal structures in nature, namely, the rare minerals clinopyroxene and leucite, but it is more commonly used as an impurity substituent in zinc ore with similar structure, sphalerite and wurtzite, while zinc ore Sphalerite and wurtzite are the main economic sources of cadmium. As a compound that is easy to separate and purify, it is the main source of cadmium in all commercial applications. Its bright yellow color made it used as a pigment for the yellow paint “Cadmium Yellow” in the 18th century.
 
Like zinc sulfide, cadmium sulfide has two crystal forms. More stable hexagonal wurtzite structure (present in Greenockite mineral) and cubic zinc mixed structure (present in Hawleyite mineral). In both forms, cadmium and sulfur atoms have four coordinates. There is also a high-pressure form with a NaCl rock salt structure.
 
Cadmium sulfide is a direct bandgap semiconductor (energy gap 2.42 eV). The proximity of its bandgap to the wavelength of visible light gives it a colorful appearance.
Both polymorphs are piezoelectric, and the hexagon is also pyroelectric.
CdS crystal can be used as the gain medium of solid-state lasers.
CdS can be used in combination with other layers in the form of thin films for certain types of solar cells. CdS is also one of the first semiconductor materials used in thin-film transistors (TFT).
 
The CdS film can be a piezoelectric film and has been used as a transducer that can operate at frequencies in the GHz range. Feel free to send an inquiry to get the latest price if you would like to buy Cadmium Sulfide CdS Powder in bulk.

Cadmium Sulfide CdS Powder CAS 1306-23-6
Cadmium sulfide Density 4.826 g/cm, solid.
Cadmium sulfide Melting point 1750 °C, 2023 K, 3182 °F (10 MPa)
Cadmium sulfide Boiling point 980 °C, 1253 K, 1796 °F (subl.)
Cadmium sulfide ：Water soluble
Cadmium sulfide Solubility Soluble in acid, slightly soluble in ammonia
Cadmium sulfide Refractive index: 2.529
Cadmium sulfide Crystal form hexagonal, cubic phase
Cadmium sulfide Standard heat generation: -162 kJ/mol
Cadmium sulfide Standard molar entropy S298 65 J/mol·K
Cadmium sulfide Decomposed by high heat to produce toxic sulfide fumes.

How is Cadmium Sulfide CdS Powder produced?
Cadmium sulfide can be prepared by precipitation from soluble cadmium(II) salts with sulfide ions. This reaction has been used for gravimetric analysis and qualitative inorganic analysis.
 
Industrial cadmium ore is leached into cadmium sulfate with sulfuric acid, adjusted to pH=3.5 and precipitated with sodium sulfide, and the pH should not be too low.
 
The production of pigments usually involves precipitation of CdS, washing of solid precipitates to remove soluble cadmium salts, then calcination (roasting) to convert them into hexagons, and then grinding to produce powders. When cadmium sulfide selenide is required, CdSe and CdS will co-precipitate, and cadmium selenide will be generated during the calcination step.
 
Applications of Cadmium Sulfide CdS Powder :
Cadmium sulfide is called cadmium yellow and is used to color enamel, glass, ceramics, plastics and paint.
Nickel yellow is suitable for coloring almost all resins and is translucent in plastics. There is a light-colored cadmium yellow containing zinc sulfide in polyethylene, and the molding processing time should be extended appropriately because zinc sulfide will promote the decomposition of polyethylene plastic and make it green. Cadmium yellow should not be mixed with pigments containing copper or copper salts to avoid the formation of black copper sulfide or green copper sulfate. Cadmium yellow and blue pigments can be mixed together to obtain green.
Cadmium sulfide is mainly used as a pigment owing to its good thermal stability, light and weather fastness, chemical resistance, and high opacity.
Other applications of cadmium sulfide are listed below:
Photoresistors
Thin-film transistors
Transducers
Solar cells
Electrochemical deposition
Sol-gel techniques
Screen printing.

Storage Condition of Cadmium Sulfide CdS Powder:
Damp reunion will affect CdS powder dispersion performance and using effects, therefore, Cadmium Sulfide CdS Powder should be sealed in vacuum packing and stored in cool and dry room, the Cadmium Sulfide CdS Powder can not be exposure to air. In addition, the CdS powder should be avoided under stress.

Packing & Shipping of Cadmium Sulfide CdS Powder:
We have many different kinds of packing which depends on the Cadmium Sulfide CdS Powder quantity.
Cadmium Sulfide CdS Powder packing:vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Cadmium Sulfide CdS Powder shipping:could be shipped out by sea , by air, by express?as soon as possible once payment receipt.