zro2 ceramic ring

high toughness ZrO2 ceramic ring,ZrO2 ceramic ring,zirconia ring,industrial ceramic ring

 

 

Features:

 

 

1.Zirconia ceramics have a martensite-type transformation mechanism of stress induction, giving the ability to absorb great amount of stress relative to other ceramics.

 

2.Zirconia (TZP) offers chemical and corrosion resistance to temperatures well above the melting point of Alumina.

In its pure form crystal structure changes limit mechanical applications, however stabilised Zirconias produced by addition of Calcium, Magnesium or Ytrium Oxides can produce very high strength, hardness and particularly toughness. In addition the material has low thermal conductivity and is an ionic conductor above 600ºC. This has lead to applications in oxygen sensors and high temperature fuel cells.

 

 

				ZTA	(TTZ)	YTZP (Sintered)
Properties*		Units	Test	Zirconid-Toughened Alumina	MgO Partially Stabilized Zirconia	Y2O3 Partially Stabilized Zirconia
Density		gm/cc	ASTM-C20	4.01	5.72	6.02
Water Absorption		%	ASTM-373	0	0	0
Color		color	_	WHITE	IVORY	IVORY
Flexual Strength(MOR)	20¡ãC	Mpa(psix103)	ASTM-F417	450(65)	900(130)	1240(180)
Elastic Modulus	20¡ãC	Gpa(psix106)	ASTM-C848	360(52)	200(29)	210(30)
Poisson's Ratio	20¡ãC	_	ASTM-C848	0.23	0.30	0.23
Compressive Strength	20¡ãC	Mpa(psix103)	ASTM-C773	2900(421)	1750(254)	2500(363)
Hardness		Gpa(kg/mm2)	KNOOP 1000gm	14.4(1475)	11.8(1200)	12.7(1300)
		R45N	ROCKWELL 45N	85	77	81
Tensile Strength	25¡ãC	Mpa(psix103)	ACMA TEST #4	290(42)	352(62)	_
Fracture Toughness	K(Ic)	Mpa m1/2	NOTCHED BEAM	5-6	11	13
Thermal Conductivity	20¡ãC	W/m K	ASTM-C408	27.0	2.2	2.2
Coefficient of Thermal Expansion	25- 1000¡ãC	1x10-6/¡ãC	ASTM-C372	8.3	10.2	10.3
Specific Heat	100¡ãC	J/kg*K	ASTM-E1269	885	400	400
Thermal Shock Resistance	¦¤Tc	¡ãC	NOTE3	500	800	50
Maximum Use Temperature		¡ãC	NO-LOAD COND.	1500	1500	300
Dielectric Strength		ac-Kv/mm(acV/mil)	ASTM-D116	9.0(228)	9.4(240)	9.0(228)
Dielectric Constant	1MHz	25¡ãC	ASTM-D150	10.6	28.0	29.0
Dielectric Loss(tan delta)	1MHz	25¡ãC	ASTM-D150	0.0005	0.001	0.001
Volume Resistivity	25¡ãC	ohm-cm	ASTM-D1829	>1014	>1013	>1013
	500¡ãC	ohm-cm	ASTM-D1829	2x109	2x105	2x104
	1000¡ãC	ohm-cm	ASTM-D1829	3x106	<103

Item	Material: ZrO2	Bearing Steel
Density (g/cm3)	6.05	7.85
ThermalExpan (10­-6/k)	10.5	12.5
Max Use Temperature ¡ãC	750	300
Water Absorption (%)	0	0
Corrosion Resistance	Excellent	Poor

Chemical Analysis

Element	Compositions				Crucible Backup
	3001	1651	2004	2290	1859	3001
SiO2	1.5	0.4	27.0	0.3	0.6	1.2
CaO	0.2	3.1	0.3	0.3	4.5	0.2
MgO	2.7	0.4	0.2	0.1	4.5	2.2
Fe2O3	0.1	0.1	0.2	0.1	0.2	0.2
Al2O3	0.8	0.4	0.5	0.3	0.25	0.7
TiO2	0.1	0.1	0.2	0.1	0.2	0.2
Y2O3	- - -	- - -	- - -	5.2	- - -	- - -
ZrO2	94.6	95.5	71.6	93.6	89.75	95.3

Physical Properties

	Compositions				Backup Sizing
	3001	1651	2004	2290	1859	3001
Density	4.6g/cc	4.2g/cc	3.6g/cc	4.5g/cc	-8+100 Tyler mesh Size	-8+28 Tyler mesh Size
Porosity	18%	25%	16%	23%
MOR @R.T.	3500psi	2400psi	4300psi	2400psi

Special offer:      Most of our crucibles are produced to order, please mark clearly height, bottom diameter, top diameter, wall thickness and any special requirements i.e. lips etc. To speed up quotations please supply a drawing and if appropriate, the name of the system in which they are to be used.