Barium titanate

CAS number : 12047-27-7

Molecular weight :233.19

Molecular formula/chemical symbol :BaO3Ti

Description :

Barium titanate
Identifiers
CAS number	12047-27-7 Y
PubChem	6101006
ChemSpider	10605734 Y
RTECS number	XR1437333
Jmol-3D images	Image 1
Properties
Molecular formula	BaTiO3
Molar mass	233.192 g/mol
Appearance	white crystals
Odor	odorless
Density	6.02 g/cm3, solid
Melting point	1625 °C
Solubility in water	insoluble
Solubility	slightly soluble in dilute mineral acids; dissolves in concentrated sulfuric acid and hydrofluoric acid
Band gap	3.2 eV (300 K, single crystal)[1]
Structure
Crystal structure	Tetragonal, tP5
Space group	P4mm, No. 99
Hazards
R-phrases	R20/22
S-phrases	S28A, S37, and S45
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

USES :

Titanium nitride (TiN) (sometimes known as “Tinite” or “TiNite” or “TiN”) is an extremely hard ceramic material, often used as a coating on titanium alloys, steel, carbide, and aluminium components to improve the substrate's surface properties.

Applied as a thin coating, TiN is used to harden and protect cutting and sliding surfaces, for decorative purposes (due to its gold appearance), and as a non-toxic exterior for medical implants. In most applications a coating of less than 5 micrometres (0.00020 in) is applied.

Summary of characteristics

• Vickers hardness 18-21 GPa
• Modulus of elasticity 251 GPa
• Thermal conductivity 19.2 W/(m·°C)
• Thermal expansion coefficient 9.35×10⁻⁶ K⁻¹
• Superconducting transition temperature 5.6 K
• Magnetic susceptibility +38×10⁻⁶ emu/mol

• For high temperature, wear-resistant, low-E glass coating and medical fields. Gold coating of titanium nitride jewelery industry, mainly used for coating Case

  Keywords Electronic chemicals