coefficient of thermal expansion

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coefficient of thermal expansion

The change in the dimensions of a material when its temperature is raised 1°C. In dentistry, if the relative expansion and contraction of restorative materials, casts, or appliances are not accounted for, the patient may have problems with improper fitting, microleakage, or adhesive debonding.
See also: coefficient
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Semitron ESd 420 is said to offer just the right combination of properties for the job: static dissipation, low coefficient of expansion, and high strength and heat resistance.
The substrate is bonded to a metal base, which has a thermal coefficient of expansion closely matched to that of the beryllium oxide.
In the past, the acrylics had a high shrink rate and coefficient of expansion.
If it were desirable, ceramic can have a very low coefficient of expansion (as low as 2.
This design allows for low resistance values and a closer match in temperature coefficient of expansion to the substrate when compared to traditional thick film resistors constructed with ceramic substrate.
Silicon--increases the fluidity of molten aluminum, decreases hot cracking tendency and solidification shrinkage, improves pressure tightness and reduces the coefficient of expansion.
One of the newest engineered vinyls for the construction market is BFGoodrich's Advex 91025, introduced in December 1990 in response to the need of window manufacturers for a cost-competitive thermoplastic for interiors where coefficient of expansion and stiffness are critical.
Magnesium has a high coefficient of expansion and there were wide temperature swings in the shop," explains Cross.
The CRF-Series RF reed relay is a low-profile, patent pending device made with a ceramic case that exactly matches the thermal coefficient of expansion of the reed switch glass and lead to eliminate any potential packaging stress.

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