Heat-radiating ceramics

Ceramic Parts Hong Kong produce heat-radiating ceramics for heat sink, which are called N-9H and N-6H, both mainly formed by alumina.
In the past, convection generated by heat conduction or a fan was commonly used for heat sinks. Ceramic Parts Hong Kong’s N-9H and N-6H are materials with high thermal emissivity and are considered as a new solution for heat-radiating heat sinks.

N-9H　SEM phote micrograph（x5000）

Table: Properties of heat-radiating ceramics N-9H and N-6H

Material			Alumina system	Alumina system
Nishimura Ref. No.			N-9H	N-6H
Color			Flesh color	White
Density		ｇ/cm3	3.9	3.7
Water absorption		％	0	0
Thermal properties	Thermal emissivity		0.97	0.963
	Heat conductivity	W/m・K	39	26
	Thermal expansion coefficient	×10-6/℃	7.7	7.7
	For plasma resistance	℃	200	200
	Max. operation temperature	℃	1500	1500
Manufacturing methods			Pressing and CIP Form: plate Machine processible	Injection Irregular form available

* The figures above are not guaranteed value.

Material properties: Major material property list(PDF 63.7KB)

FPGA heat sink
Troidal coil heat sink
Tokyo Skytree LED N-9H ceramic heat sink example
Desktop LED N-9H ceramic heatsink