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PTFE's coefficient of friction is 0.05 to 0.10, [26] which is the third-lowest of any known solid material (aluminium magnesium boride (BAM) being the lowest, with a coefficient of friction of 0.02; diamond-like carbon being second-lowest at 0.05).
1 Thermal expansion. 2 Notes. 3 References. Toggle References subsection. 3.1 CRC. 3.2 CR2. 3.3 LNG. 3.4 WEL. Toggle the table of contents. Thermal expansivities of ...
A number of materials contract on heating within certain temperature ranges; this is usually called negative thermal expansion, rather than "thermal contraction".For example, the coefficient of thermal expansion of water drops to zero as it is cooled to 3.983 °C (39.169 °F) and then becomes negative below this temperature; this means that water has a maximum density at this temperature, and ...
for enhanced wear resistance, lower friction, improved dimensional stability (low coefficient of thermal expansion), and stability against oxidation. Example: Vespel SP-22. 10% PTFE and 15% graphite by weight, SP-211 added to the base resin for the lowest coefficient of friction over a wide range of operating conditions.
For a single component system, the "standard" three parameters are the isothermal compressibility , the specific heat at constant pressure , and the coefficient of thermal expansion . For example, the following equations are true:
PCTFE has high tensile strength and good thermal characteristics. It is nonflammable [14] and the heat resistance is up to 175 °C. [15] It has a low coefficient of thermal expansion. The glass transition temperature (T g) is around 45 °C. [1] PCTFE has one of the highest limiting oxygen index (LOI). [16] It has good chemical resistance.
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Materials with zero or extremely low coefficient of thermal expansion. Subcategories. This category has only the following subcategory. L. Low-expansion glass (5 P)