Thermal Expansion of Glasses

The thermal expansivity of Ni—Fe alloys vary from ca 0 at ca 36 wt % Ni (Invar [12683-18-OJ) to ca 13 x 10 / C for Ni. Hence, a number of compositions, which are available commercially, match the thermal expansivities of glasses and ceramics for sealing electron tubes, lamps, and bushings. In addition, the thermal expansion characteristic is utilized ia temperature controls, thermostats, measuriag iastmments, and condensers. 

Cross-linked polyester composites have a relatively low coefficient of thermal conductivity that can provide beneficial property retention in thick laminates at high temperatures as well as remove the need for secondary insulation. The coefficient of thermal expansion of glass-reinforced composites is similar to aluminum but higher than most common metals. 

Epoxy resin has a higher strength at elevated temperatures than polyester resins but is not as resistant to attack by some fluids. Some glass-reinforced epoxy-resin pipe is made with a polyester-resin hner. The coefficient of thermal expansion of glass-reinforced resin pipe is higher than that for carbon steel but mu less than that for plastics. 

Tool, A. Q. (1946). Relation between inelastic deformability and thermal expansion of glass in its annealing range. J. Am. Ceram. Soc. 29(9), 240-253. 

The coefficient of thermal expansion of glass is a most important physical property. It is defined, for all solids, as the increase in length per unit length per degree rise in temperature. The coefficient of thermal expansion is a ratio and so has no units. It is, however, necessary to quote the temperamre scale used. 

Thermal expansion of glass is usually expressed by the linear expansion coefficient a the volume expansion coefficient = 3a. It is usual to distinguish between the true and the mean expansion coefficient, the former being related to a certain temperature and the latter to a wider temperature range. ... 

FIG. 118. Thermal expansion of glass. The full line corresponds to well annealed glass, the dashed line to glass with residual internal stress. 

How does the thermal expansion of glass compare to that of most organic compounds ... 

CAS 1314-13-2 EINECS/ELINCS 215-222-5 Uses Activator for rubber vulcanization pigment in paints where fungal resist., tint retention, bodying effect in linseed oil, and flow props, are required reduces thermal expansion of glass and is used in ovenware, tableware, and laboratory glassware for cosmetic preparations for skin and hair, ointments for bums, and in adhesive dressings animal/plant food additive... 

Thermal Expansion of SiC-Whisker-Reinforced Ceramics Thermal Expansion of Glasses Thermal Expansion of Polymers... 

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