Low Thermal Expansion Glass Ceramics

Clearceram z is a glass cer amic with an ultra low thermal expansion coefficient which was developed by ohara based on our knowledge of high homogeneity melting and precise crystallization.

Low thermal expansion glass ceramics.

This material was developed by ohara based on our knowledge of high homogeneity melting and precise crystallization. Because fine ceramics possess low coefficients of thermal expansion their distortion values with respect to changes in temperature are low. Even for the mass production of high quality cooktop panels ceran oven windows and other household appliances a high reproducibility of the properties is achieved. Zerodur is a registered trademark of schott glass technologies.

This material is produced under tightly controlled conditions and offers outstanding thermal mechanical and chemical properties. Ultra low expansion glass is a registered trademark of corning incorporated. With an almost zero thermal expansion coefficient it is ideal for high temperature appliances. Due to the low thermal expansion las glass ceramic systems are known for their thermal shock resistance.

These products include trade names of zerodor hercuvit and pyroceram. The most effective nuclei in the las glass ceramic system are tio 2 zro 2 p 2 o 5 tao 5. Today glass ceramic products such as transparent mirror blanks and stove tops and cookware are manufactured and in daily use. Such high resistance to thermal expansion makes it very resistant to high temperature thermal shock.

Ule has been made by corning since the 1960s but is still very important to current applications. It is produced under tightly controlled conditions and offers outstanding thermal mechanical and chemical properties. Excellent cte homogeneity throughout the total volume. It is a glass ceramic with an extremely low thermal expansion coefficient 0 02 x 10 6 k at 0 50 c.

Covalent materials such as diamond silicon carbide and silicon nitride have strong bonds between atoms resulting in low coefficients of thermal expansion. Ule has a very low coefficient of thermal expansion and contains as components silica and less than 10 titanium dioxide. Thus glass ceramics with thermal coefficients of expansion of less than 0 3 x 10 6 k 1 can be obtained. Zerodur the extremely low expansion glass ceramic has various extraordinary properties including.

Ceramic glassis a transparent low expansion glass ceramic with a number of outstanding features that include high resistance to thermal shock high mechanical strength and excellent electrical characteristics. Most of which have low or zero thermal expansion which allows them to be exposed to rapid temperature changes or localized heating or cooling. Clearceram z is a glass ceramic with an ultra low thermal expansion coefficient.