Material Specifications

Material Specifications for Ceramic Engineering Components and Laboratory Crucibles.

		Circón	Mullite	Alumina			Zircone					Alu. Titanate*
Physical Properties	Units			92%	96%	99.7%	Mg-PSZ		Y-TZP(1)		Ca-TZP (2)	A.T
Reference		KZ	KM	KA 92	KA 96	KA 997	KZM	KZY 8%	KZY1000	KZY2000	KZCa	KeTiAl
Melting point	ºC	2550	1920	2700	2750	2050	2750	2700	2750	2750	2750
Max. operating temperature	ºC	1600	1700	2000	2000	1850	1200	2000	1200	1200	2000	1000
Density 20ºC	g / cm3	4.5	3	5.9	5.6	3.9	6.9	5.9	6.9	6.9	5.6	3-3.4
The published figures are based on samples of standard items and represent the mean values of a permanent output. These figures should not be considered guaranteed without our previous consent. (1) Zircone stab. with Ca (2) Zircone stab. with Yttrium * Excellent results in contact with non-ferrous materials.

		Circón	Mullite	Alumina			Zircone					Alu. Titanate*
Physical Properties	Units			92%	96%	99.7%	Mg-PSZ		Y-TZP(1)		Ca-TZP (2)	A.T
Reference		KZ	KM	KA 92	KA 96	KA 997	KZM	KZY 8%	KZY1000	KZY2000	KZCa	KeTiAl
Polished surface quality (Ra)	πm	0.2	0.2	0.2	0.3	0.3	0.08		0.04	0.02
Hardness Vickers	GPa	9	9	14.4	17.1	19.3	11		13	14	12
Bending strength (4 points)
20 ºC	MPa	250	170	296	296	389	620		1000	1500	350-750
800 ºC	MPa			200	215	287	322		270	360
Traction strength 20 ºC	MPa		1.8	8.5	8.8	9	2.2		4	4
Compressive strength
20 ºC	MPa		500	2100	2100	2500	3500		4000	4000	3500-7500
800 ºC	MPa			1400	1400	1500	1800		2000	2000
1000 ºC	MPa			1400	1400	1500	1800		2000	2000
Young Moduls 20ºC	GPa		150	278	334	371	200		210	210	195
Fracture toughness 20ºC K1c	MPa.√m		2	4.95	5.4	5.6	8.5		9.5	10
The published figures are based on samples of standard items and represent the mean values of a permanent output. These figures should not be considered guaranteed without our previous consent. (1) Zircone stab. with Ca (2) Zircone stab. with Yttrium * Excellent results in contact with non-ferrous materials.

		Circón	Mullite	Alumina			Zircone					Alu. Titanate*
Thermal Properties	Units			92%	96%	99.7%	Mg-PSZ		Y-TZP(1)		Ca-TZP (2)	A.T
Reference		KZ	KM	KA 92	KA 96	KA 997	KZM	KZY 8%	KZY1000	KZY2000	KZCa	KeTiAl
Thermal expansion coeff. 25-1000 ºC	x10-6/ºC	4.8	5.3	11.5	9	8.6	9	11.5	11	11	9	0-2
Thermal shock resistance	ΔTºC	Good	Good	Media	Good	Average	Good		Good	Good		Excellent
Thermal conductivity
20 ºC	W/mºK	5	6	1.7	1.9	29	1.9	1.7	3	3	1.9	<2
500 ºC	W/mºK		4	1.7	2.1	12	2.1	1.7	2	2	2.1	<2
1000 ºC	W/mºK		1.8	1.7	2.2	9	2.2	1.7	4	4	2.2	<2
Specific heat 20 ºC	J/Kg/ºK	625	950	650	670	1025	680	650	650	650	670	30
The published figures are based on samples of standard items and represent the mean values of a permanent output. These figures should not be considered guaranteed without our previous consent. (1) Zircone stab. with Ca (2) Zircone stab. with Yttrium * Excellent results in contact with non-ferrous materials.

		Circón	Mullite	Alumina			Zircone					Alu. Titanate*
Electrical Properties	Units			92%	96%	99.7%	Mg-PSZ		Y-TZP(1)		Ca-TZP (2)	A.T
Reference		KZ	KM	KA 92	KA 96	KA 997	KZM	KZY 8%	KZY1000	KZY2000	KZCa	KeTiAl
Electrical resistance
20 ºC	Ω.m		>1014	>1012	>1012	>1012	>107		>107	>107	>107
1000 ºC	Ω.m		3. 107	104	105	105	0.1
Dielectric strength	KV / mm.		9.8	14	14	12	8.8		8.7	8.7
Dielectric constant 25ºC
1 Khz				8.3	8.3	8.7
1 Mhz		7.8	7	8.3	8.3	8.7	2.4		2.4	2.4
1 Ghz			7	8.1	8.1	8.2
The published figures are based on samples of standard items and represent the mean values of a permanent output. These figures should not be considered guaranteed without our previous consent. (1) Zircone stab. with Ca (2) Zircone stab. with Yttrium * Excellent results in contact with non-ferrous materials.