Cadmium Arsenide

Cadmium Arsenide particles are compound particles of Cadmium (Cd) and Arsenic (As), the appearance may vary depending on factors such as particle size and purity, usually dark solid particles, which have semiconducting properties, but as both Cadmium and Arsenic are toxic, they need to be handled and used with safety precautions.

Characteristics

Chemical formula: Cd3As2

Molecular weight: 487.08 g/mol

EINECS : 234-484-1

Density: 3.031 g/cm³.

Colour: grey-black

Crystal structure: Tetragonal crystal structure

Melting point: 721°C

Solubility: decomposes in water

Energy gap: 0.14 eV, belongs to the narrower energy gap semiconductor materials, the electron mobility at room temperature is very large, showing the characteristics of n-type semiconductor.

Application

Semiconductor field:

Electronic devices: Cadmium arsenide at room temperature electron mobility is very large, showing the characteristics of n-type semiconductor, can be used in the manufacture of a variety of electronic devices, such as field effect transistors (FET). In some of the semiconductor performance has special requirements of electronic equipment, cadmium arsenide can play its unique electrical performance advantages.

Infrared detectors: Cadmium arsenide has a high sensitivity to infrared light, can be used to make infrared detectors. In the military, security, aerospace and other fields, infrared detectors have a wide range of applications, can detect the infrared light emitted by the object, to achieve the monitoring and tracking of the target.

Sensor field:

Pressure sensors: the use of cadmium arsenide Nernst effect, that is, its magnetic field and temperature gradient in the presence of the phenomenon of electrical conduction can be applied to pressure sensors. Changes in pressure will lead to changes in the physical properties within the material, resulting in different electrical signal output to achieve the measurement of pressure.

Magnetoresistive sensors: Cadmium arsenide in the magnetic field under the action of resistance will change, this magnetoresistive properties make it suitable for magnetoresistive sensors. Magnetoresistive sensors can be used to detect the strength and direction of the magnetic field, in magnetic storage devices, automotive electronics, industrial automation and other fields have important applications.

Dopant: Cadmium arsenide can be used as a dopant in the preparation of some semiconductor materials. For example, in materials such as mercury cadmium telluride, doped with an appropriate amount of cadmium arsenide can change the electrical properties and optical properties of the material, making it more suitable for specific applications.

Scientific research field: in the field of materials science, physics and other scientific research, cadmium arsenide particles are often used to study the physical properties of semiconductor materials, electronic structure and related quantum effects. Through the study of cadmium arsenide, researchers can gain an in-depth understanding of the basic properties and behavioural laws of semiconductor materials, providing a theoretical basis for the development and application of new semiconductor materials.