Thermal Resistance Of A Ceramic

For example a characteristic of a heat sink.

Thermal resistance of a ceramic.

Properties affecting thermal stress resistance of. Cordierite is mainly a structural ceramic and is often used for kiln furniture due to its extremely good thermal shock resistance. Testing thermal shock resistance a material s thermal shock resistance is determined by the difference between the peak temperature of the fine ceramic which was heated rapidly cooled and then fractured and that of the cooling media. Alumina is the most well known fine ceramic material for chemical and physical stability.

Thermal resistance is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow thermal resistance is the reciprocal of thermal conductance. Specific thermal resistance or thermal resistivity r. High heat resistance and high thermal conductivity. Factors affecting thermal stress resistance of ceramic materials by w.

The subject of thermal resistance at interfaces between aluminum heat sinks and ceramic packages has been discussed by lee 1 de sorgo 2 latham 3 and early et al. The new experimental approach which should be applied whenever a thermal contact resistance is suspected has been demonstrated by two series of measurements on a stainless steel at room temperature. If a ceramic material is rapidly cooled its surface reaches the temperature of cooling environment and tends to contract thermal contraction. Thermal shock resistance is an ability of material to withstand sharp changes in temperature.

This differential expansion can be more directly understood in terms of strain than in terms of stress as. Thermal shock is a type of rapidly transient mechanical load by definition it is a mechanical load caused by a rapid change of temperature of a certain point. Absolute thermal resistance r in kelvins per watt k w is a property of a particular component. It can be also extended to the case of a thermal gradient which makes different parts of an object expand by different amounts.

High electrical insulation high corrosion resistance and biocompatibility. Like other structural ceramic materials cordierite also has good thermal and electrical insulating capabilities. High strength and high hardness.