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Taylor Ceramic Engineering manufactures a wide range of shapes and sizes in high purity alumina.

The combination of alumina's mechanical and electrical properties make it the material of choice for the manufacture of electrical insulators.

Alumina has many physical properties greater than traditional porcelain bodies as shown in the table below.

**Insulator properties**
TYPICAL PHYSICAL PROPERTIES	UNIT	ALUMINA	PORCELAIN
Young's modulus of elasticity	GPa	380	100-180
Comparitive strength	MPa	2,900	440
Tensile strength	MPa	260	80
Flexural strength	MPa	325	100
Hardness	Knoop	>2000	790
Density	g.cm3	3.7 - 3.97	2.6 - 3.4
Apparent porosity	%	less than 1	2 - 8
Heat capacity	J.kg-1.K-1	0.99	0.95
Thermal expansion coefficiant	10-6K-1	7.7	6
Thermal conductivity (200c)	W.m-1.K-1	25	2 - 5
Thermal shock factors	R R' R''	90 2250 580	100 190 77
Permittivity		9	6 - 7
Loss tangent	10-4(25c)	2	250 - 300
Resistivity	log10 ohm.cm	12	11
Electrical breakdown	kV.mm-1	17	20