Metallic Chromium Powder Cr99.5% Metallic Chromium Particle Jcr-99A

• Certification: ISO
• Shape: Granular Powder
• Purification Method: Electromigration
• Preparation Method: Electrolysis of Fused Salts
• Application: Catalyst Masses, Energy Materials, Photoelectric Material, Photorecording Material
• Product Type: Rare Earth Metal
• Model NO.: Pure molybdenum gasket Polish the molybdenum gaske
• Composition: Cr 99.95
• Transport Package: Packed in Wooden Cases/Iron Drums
• Specification: High temperature molybdenum wire diameter 0.18mm 0
• Trademark: taixie
• Origin: China
• HS Code: 7806009000
• Production Capacity: 500 / Ton

Product Description

Description of Product

Product Features:

 

1, metal chromium 99-A: can do particle size range: block, granular, powder: 40 mesh -500 mesh

 

Scope of application: a, smelting, welding, powder metallurgy, carbide additives, glass colorant, stainless steel additives, etc

 

b, chromium and chromium can make steel, copper, aluminum and other metals form corrosion resistant surface, is a new type of surface treatment agent.

 

C, cr powder is widely used in stainless steel, vacuum coating, ceramic, etc

 

Product shape: Irregular

 

Product material:

 

Product Name: Chrome metal powder

 

Grade /Spec: JCr-99A

 

Chemical composition: Chemical composition:

 

Granularity /SIZE: 40-300 mesh

 

Cr

 

99.17%

 

Cu
 

Chromium, the chemical symbol Cr, has an atomic number of 24 and belongs to group B in the periodic table. The name comes from the Greek word for "color," because chromium compounds have color. It is a steel-gray metal, which is the hardest metal in nature. Chromium is the 17th most abundant in the Earth's crust at 0.01%. The free form of natural chromium is extremely rare and mainly exists in chromium-lead ore.

On October 27, 2017, the International Agency for Research on Cancer (IARC) of the World Health Organization (WHO) published a preliminary list of carcinogens for reference, chromium metal in the list of three categories of carcinogens

Basic properties of chromium metal

Atomic volume: 7.23cm3/mol

Element content in the Sun: 20ppm

Element content in seawater: 0.00015ppm on the surface of the Pacific Ocean

Content in the crust: 100ppm

Number of protons: 24

Number of neutrons: 28

Atomic number: 24

Owning period: 4

Family number: VIB

Nuclear charge: 24

Electron shell distribution: 2-8-13-1

Electron shell: K-L-M-N

Outer electron layer arrangement: 3d54s1

Crystal structure: The cell is a body centered cubic cell, each cell contains 2 metal atoms.

Oxidation states: +3 (main), +6, +5, +4, +2, + 1,0, -1, -2

Electronegativity: 1.66

Peripheral electron configuration: 3d5 4s1

Electron configuration: 2,8,13,1

Isotopes: Cr-49, Cr-50, Cr-51, Cr-52, Cr-53, Cr-54

First ionization energy: 653KJ·mol-1

Second ionization energy: 1592KJ·mol-1

Third ionization energy: 2987KJ·mol-1

Solid density: 7.19g/cm3

Liquid density: 6.9g/cm3

Specific heat: 448J/(kg·K)(300K)

Thermal conductivity: 90.7W/(m·K)(300K)

Elemental melting point: 1907ºC

Elemental boiling point: 2761ºC

Atomic radius: 1.28 angstroms [1]

Ionic radius: 0.62 angstroms (+3)

Covalent radius: 1.18 angstroms

Cell parameters: a = 291 pm; b = 291 pm; c = 291 pm; α = 90°; β = 90°; Gamma is equal to 90 degrees

Mohs hardness: 9

Ionization energy (kJ/mol)

M-M + 652.7

M+ - M2+ 1592

M2+ - M3+ 2987

M3+ - M4+ 4740

M4+ - M5+ 6690

M5+ - M6+ 8738

M6+ - M7+ 15550

M7+ - M8+ 17830

M8+ - M9+ 20220

M9+ - M10+ 23580

Physical properties

Metal chrome block, glass seal chrome display specimen

Metal chrome block, glass seal chrome display specimen

Chromium is a silvery shiny metal. Pure chromium is malleable. Impurities are hard and brittle. Density 7.20g/cm3. Soluble in strong alkali solution. Chromium is highly resistant to corrosion and oxidizes very slowly in air, even in a state of red heat. Insoluble in water. Plating on metal provides protection.