Zirconia Ceramics

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Zirconia materials are among the strongest ceramic materials STC offers. Each stabilized zirconia provides unique and specific properties that meet the demands of extreme applications found in many industries. Offering very high strength, high toughness, wear/abrasion resistance, as well as corrosion resistance, they perform in operating environments that plastics, metals and other ceramic materials cannot withstand. Typical applications include structural components, bushings, pistons, sleeves, rollers, guides, insulators, and more.

Magnesia Stabilized Zirconia (MSZ) – magnesia stabilized; for high-temperature applications; it is not vulnerable to phase transformations at elevated temperatures; heterogeneous microstructure to protect against grain boundary sliding; transformation toughened; high fracture toughness
Yttria Stabilized Zirconia (YTZP) – yttria stabilized; fine-grained microstructure predominantly tetragonal phase; extremely high strength and toughness; use temperatures below 500°C; transformation toughened to resist crack propagation; superior chemical resistance; excellent wear resistance
Ceria Stabilized Zirconia (CSZ) – ceria stabilized high temperature, as well as high or low pH environments; transformation toughened; maintains strength in steam and pressure conditions; ceria fills crystal structure vacancies to prevent low temperature degradation
Zirconia Toughened Alumina (ZTA) – zirconia toughened alumina; provides 20-30% greater strength than alumina at a lower cost than stabilized zirconias. Transformation toughened; Higher toughness, hardness and wear resistance than alumina

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Property Charts & Safety Data Sheets
Property Charts	Zirconias
Master Ceramics Property Chart	Full Color Printer Friendly - Color Printer Friendly - B&W
Safety Data Sheets	Dense Ceria Stabilized Zirconia Ceramic Ceria Stabilized Zirconia Powder (RTP) Dense Magnesia Stabilized Zirconia Ceramic Spray Dried Magnesia Stabilized Zirconia Powder (RTP) Dense Yttria Stabilized Zirconia Ceramic Spray Dried Yttria Stabilized Zirconia Powder (RTP)

Prime Features
Performs Well In Corrosive Environments

Typical Applications
Structural ceramic parts	Aerospace
Medical	Bearings
Analytical instrumentation

Materials Property Chart

		Zirconias
	Property	ASTM Method	Units	MSZ (Magnesia Stabilized)	YTZP 2000 (Yttria Stabilized)	YTZP 4000 (Yttria Stabilized)	CSZ (Ceria Stabilized)
General	Crystal Size (Average)	Thin Section	Microns	30	1	1	3
	Color	--	--	Ivory or Yellow	Ivory	Ivory	Yellow
	Gas Permeability	--	atms-cc/sec	gas tight <10^-10	gas tight <10^-10	gas tight <10^-10	gas tight <10^-10
	Water Absorption	C 20-97	%	0	0	0	0
	Mechanical	Density	C 20-97	g/cc	5.72	6.02	6.07	6.20

Hardness		Vickers 500gm	GPa (kg/mm²)	11.7 (1200)	12.5 (1250)	12.5 (1250)	11.7 (1200)
Hardness		--	R45N	78	80	80	78
Fracture Toughness		Notched Beam	MPam^1/2	12	10	10	12
Flexural Strength (MOR) (3 point) @ RT		F417-87	MPa (psi x 10³	620 (90)	951 (138)	1380 (200)	551 (80)
Tensile Strength @ RT		--	MPa (psi x 10³)	310 (45)	550 (80)	690 (100)	337 (49)
Compressive Strength @ RT		--	MPa (psi x 10³)	1862 (270)	2485 (360)	2485 (360)	2000 (290)
Elastic Modulus		C848	GPa (psi x 10⁶)	206 (29.8)	210 (30)	210 (30)	200 (29)
Poisson's Ratio		C848	--	0.28	0.30	0.3	0.25
Thermal	C.T.E. 25 - 100° C	C 372-96	x 10^-6/C	8.9	6.9	6.9	6.9
	C.T.E. 25 - 300° C	C 372-96	x 10^-6/C	9.7	8.1	8.1	8.1
	C.T.E. 25 - 600° C	C 372-96	x 10^-6/C	10	10.5	10.5	10.5
	Thermal Conductivity @ RT	C 408	W/m K	3	2.2	2.2	3.5
	Max Use Temp	--	Fahrenheit (°F)	2200	932	932	1000
	Max Use Temp	--	Celsius (°C)	1200	500	500	537
Electrical	Dielectric Strength (.125" Thick)	D 149-97A	V/mil	300	240	240	250
	Dielectric Constant @ 1 MHz	D 150-98	--	22.7	30.0	30.0	30.0
	Dielectric Constant	D 2520-95	--	29.2	--	--	--
	@ Gigahertz	D 2520-95	--	6.2	--	--	--
	Dielectric Loss @ 1 MHz	D 150-98	--	0.0016	0.0010	0.0010	0.0010
	Dielectric Loss	D 2520-95	--	0.0018	--	--	--
	@ Gigahertz	D 2520-95	--	6.2	--	--	--
	Volume Resistivity, 25°C	D 257	ohms-cm	> 1 x 10¹³	> 1 x 10¹³	> 1 x 10¹³	> 1 x 10¹³
	Volume Resistivity, 300°C	D 1829	ohms-cm	5 x 10⁷	1 x 10¹⁰	1 x 10¹⁰	1 x 10¹⁰
	Volume Resistivity, 500°C	D 1829	ohms-cm	1 x 10⁷	1 x 10⁶	1 x 10⁶	1 x 10⁶
	Volume Resistivity, 700°C	D 1829	ohms-cm	2 x 10⁶	5 x 10³	5 x 10³	5 x 10³

Note: The information in this data sheet is for design guidance only. STC does not warrant this data as absolute values. Forming methods and specific geometry could affect properties. Slight adjustments can be made to some of the properties to accommodate specific customer requirements. Most of the dense materials in the table are resistant to mechanical erosion and chemical attack. STC has performed ASTM testing qualification for certain compositions, in accordance with ASTM D2442. Please consult our technical staff for appropriate material and specific test results.

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