Low Thermal Expansion Ceramics

Patrick tepesch a corning research scientist demonstrates what happens when you heat up ceramics with different thermal expansion thresholds.

Low thermal expansion ceramics.

Nexcera is an ultra low thermal expansion ceramic with a cordierite base 2mgo 2al 2 o 3 5sio 2 it features zero expansion near room temperature and is stronger and more durable than low thermal expansion glass. Adceram cs low thermal expansion and heat insulating ceramics adceram cs is light weight and has unique thermal characteristics a low coefficient of thermal expansion low heat conductivity and high thermal shock resistance. Our diffusion bonding makes it possible to mold complex hollow shapes. Cordierite cordierite is an extremely low thermal expansion ceramic which is ideal for light weight designs of mirrors and telescopes.

By utilizing dense cordierite with a low thermal expansion coefficient deformation due to temperature change is suppressed. Nexcera ultra low thermal expansion ceramics. Today our low expansion ceramics are used in exhaust gas treatment applications to help reduce harmful emissions from cars and trucks. Low thermal expansion ceramic mirrors highly rigid and extremely thin with reduced weight.

Fine ceramics also known as advanced ceramics have low coefficients of thermal expansion less than half those of stainless steels. Extremely low thermal expansion zerodur the extremely low thermal expansion glass ceramic from schott delivers extremely high precision for many challenging high tech applications some of the applications for zerodur include ic interated circuit and fpd flat panel display lithography high precision metrology and astronomy all demanding applications in which geometrical shape and. The coefficient ratio of thermal expansion indicates how much a material expands per 1 2 2 rise in temperature. Thermal expansion is the tendency of matter to change its shape area volume and density in response to a change in temperature usually not including phase transitions.

In the video below dr. Also due to excellent heat insulation with small dimensional changes from heat adceram cs can cope with abrupt temperature changes. When a substance is heated molecules begin to vibrate and move more usually creating more distance between themselves. Due to their low thermal expansion often close to zero las glass ceramic has been widely used for more than 60 years in telescopes mirrors 18 optical precision systems 19 cooktops 20.

Temperature is a monotonic function of the average molecular kinetic energy of a substance.