Ruby Powder

Ruby Powder is a fine-grained material available in 19 variations available. With properties like hardness, strength and thermal conductivity, it can be utilized in applications such as surface coatings, polishing compounds and the creation of custom ceramics. The availability of both synthetic and natural forms in our range of sizes makes Ruby Powder suitable for research and development across industrial sectors.

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Tolerance

Properties

Reference & Citations

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Tolerances

Powder

Mean Particle Size		Nominal
Minimum Particle Size		Nominal
Maximum Particle Size		Nominal
Maximum Particle Size		Nominal
Particle Size D10		Nominal
Particle Size D50		Nominal
Particle Size D90		Nominal

Material Properties for Ceramics

Chemical Resistance

Element	Value
Acids - concentrated	Good
Acids - dilute	Good
Alkalis	Good
Halogens	Good
Metals	Good

Electrical Properties

Element	Value
Dielectric constant	7.5-11.5
Dielectric strength( kV mm⁻¹ )	15-50
Volume resistivity( Ohmcm )	10¹⁴@25

Physical Properties

Element	Value
Useful optical transmission range	150-5500nm
Apparent porosity( % )	0
Water absorption - saturation( % )	0
Density( gcm⁻³ )	3.98

Thermal Properties

Element	Value
Melting point( C )	2050
Upper continuous use temperature( C )	1800-1950
Specific heat( J K⁻¹ kg⁻¹ )	750@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	35-40@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	5.8@20-1000°C