Ultra Low Expansion Glass-ceramics

CLEARCERAM®-Z is a glass-ceramic with an Ultra-Low Thermal Expansion Coefficient. This material was developed by Ohara based on our knowledge of High Homogeneity melting and Precise Crystallization. This material is produced under tightly controlled conditions and offers outstanding thermal, mechanical and chemical properties. There are two versions of CLEARCERAM®-Z available based on thermal expansion differences; Regular and CCZ-HS.

Key Properties of CLEARCERAM®-Z

Ultra-Low Expansion Glass
The material 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.

Superior Mechanical Properties
The material 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.”

Superior Machinability
The crystal grain structure of the material prevents the propagation of micro crack caused in between machining process. This property allows the material to be processed into various shapes with high accuracy, with ease of machinabilty and elevated yield rates.

Excellent Chemical Properties
The material has very high chemical durability and is very stable in various cleaning and thin-film coating processes. CLEARCERAM®-Z does not contain Na, K, B, F, and Pb in its composition which is a main reason for excellent chemical resistance the material displays.

Applications for CLEARCERAM®-Z (Ultra Low Expansion Glass)

ClearCeram-Z material is used as parts of semiconductor steppers, parts for liquid crystal steppers, optical flats, spacers, windows, parts for interferometers, laser refraction mirrors and suspensions, astronomical telescope mirrors, various disks, block gauges, standard lengths, long precision scales, optical pedestal platforms, pedestal for precision equipment, alternate material to quartz glass, ceramics, low thermal expansion alloys, etc.

Please contact us for additional details about our Ultra Low Expansion Glass Ceramics.