Ohara Clearceram-Z® HS Ultra Low Expansion Glass Ceramic

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Ohara Clearceram-Z® HS Ultra Low Expansion Glass Ceramic
Categories:	Ceramic; Machinable Ceramic
Material Notes:	Clearceram-Z® shows almost Zero Thermal Expansion over a wide temperature range and offers superior thermal shock resistance. CCZ Regular offers lower thermal expansion across a wide temperature range, while the CCZ HS offers lower thermal expansion near room temperature. It is comprised of approximately 70% ceramic, which makes the mechanical characteristics superior to regular amorphous glass when comparing properties such as Young´s Modulus, Rigidity, Bending Strength, and Hardness. It has superior machinability and chemical properties. Information provided by Ohara Corporation.
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Physical Properties	Original Value	Comments

Specific Gravity	2.55 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Knoop	590
Hardness, Vickers	700
Modulus of Elasticity	92.0 GPa @Temperature -50.0 - 300 °C
Modulus of Rigidity	37.0 GPa @Temperature -50.0 - 300 °C
Flexural Strength	122 MPa	4-point bending strength; JIS R1601
Poissons Ratio	0.25
Abrasion	62	Aa

Electrical Properties	Original Value	Comments
Volume Resistivity	1.90e+9 ohm-cm @Temperature 200 °C
	6.40e+12 ohm-cm @Temperature 25.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	-0.0800 µm/m-°C @Temperature -60.0 - 160 °C	Typical
	-0.0200 - 0.0200 µm/m-°C @Temperature 0.000 - 50.0 °C	Guaranteed
Specific Heat Capacity	0.773 J/g-°C
Thermal Conductivity	1.54 W/m-K

Optical Properties	Original Value	Comments
Refractive Index	1.55415	nF' (Cd F' line)
	1.52484 @Wavelength 1813.07 nm
	1.524899 @Wavelength 1529.58 nm
	1.528 @Wavelength 1550 nm
	1.5345 @Wavelength 1128.64 nm
	1.54409 @Wavelength 643.85 nm	nC' (Cd C' line)
	1.546 @Wavelength 587.56 nm	nd (He D line)
	1.54662 @Wavelength 546.07 nm	ne (Hg e line)
	1.55913 @Wavelength 435.835 nm	ng (Hg g line)
	1.56387 @Wavelength 404.656 nm	nh (Hg h line)
Abbe Number	54.9	ν d
Transmission, Visible	>= 82 % @Thickness 10.0 mm, Wavelength 500 nm	Internal Transmission
	93 % @Thickness 10.0 mm, Wavelength 600 nm	Internal Transmission
	97 % @Thickness 10.0 mm, Wavelength 700 nm	Internal Transmission
IR Transmittance	85 % @Thickness 10.0 mm, Wavelength 2500 nm	Optical Transmission
	91 % @Wavelength 850 - 2100 nm, Thickness 10.0 mm	Optical Transmission
	>= 98 % @Thickness 10.0 mm, Wavelength 980 nm	Internal Transmission
	>= 98 % @Thickness 10.0 mm, Wavelength 1550 nm	Internal Transmission
	99 % @Wavelength 800 - 1600 nm, Thickness 10.0 mm	Internal Transmission

Descriptive Properties
Acid Resistance, Powder Method, RA(P)	1
Alkali Resistance (Powder), Ralk (%)	0.19
Water Resistance, RW(P)	1

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CZOHARA787 / 281626

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