> The polyurethane board RAKU[R] TOOL WB-0801 exhibits a superior surface structure, high heat deflection temperature with very low
coefficient of thermal expansion, superb dimensional stability as well as good compressive and flexural strength.
If you have a 10-in.-long hot sprue running at 600 F, and your
coefficient of thermal expansion is off by just 0.5 x [10.sup.-6] in./in.-[degrees]F, that's a difference of 0.003 in.
where [K.sub.i] and [[beta].sub.i] are the bulk modulus and the
coefficient of thermal expansion of i components, respectively.
A strongly different behaviour of the
coefficient of thermal expansion is observed in two samples of x = 0.3 (0.3A and 0.3B).
Vespel(R) CR-6100 is easily machinable and low wear rate, low coefficient of friction, low
coefficient of thermal expansion, resistance to thermal shock and durability of vespel(R) CR-6100 are attributes in boiler feed pump wear ring and under pump operating conditions such as extreme cavitation and high vibration.
2, [[lambda].sup.0.sub.B] is the initial Bragg wavelength, CTE = [1/[LAMBDA]] [[partial derivative][LAMBDA]/[partial derivative]T] is the
coefficient of thermal expansion of the optical fiber (0.55 x [10.sup.-6] [K.sup.-1] for silica), [xi] = [1/[n.sub.eff]] [[partial derivative][n.sub.eff]/ [partial derivative]T] represents the thermo-optic coefficient (7.3 x [10.sup.-6] [K.sup.-1] for SMF-28[TM] silica-core fiber), and [p.sub.11 and [p.sub.12] are the Pockel's strain-optic coefficients (/?n=0-H3 and [p.sub.12] = 0.252 [14]).
Thermal Conductivity and
Coefficient of Thermal Expansion (CTE).
After aging, the changes in the structure of the polymers were studied by determining different material parameters, such as modulus of elasticity, glass transition temperature, melting point,
coefficient of thermal expansion, water absorption, and crystallinity, and changes in the chemical structure with several techniques, including thermomechanical analysis, differential scanning calorimetry, Fourier-transform infrared spectroscopy, moisture analysis, and a precision scale.
The commissioner said the disadvantage of leadite, however, is that it has a different
coefficient of thermal expansion than that of the pipe it seals.