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Vycor is the brand name of Corning's high-silica, high-temperature glass. It provides very high thermal shock resistance. Vycor is approximately 96% silica and 4% boron trioxide, but unlike pure fused silica, it can be readily manufactured in a variety of shapes. [citation needed] Vycor can be subject to prolonged usage at 900 °C. [1]
Glass-glass tubes have a very reliable seal, but the two layers of glass reduce the amount of sunlight that reaches the absorber. The selective coating can be deposited on the inner borosilicate tube (high vacuum side) to avoid this, but heat has then to flow through the poorly conducting glass thickness of the inner tube in this case.
Single-ended self-starting lamps are insulated with a mica disc and contained in a borosilicate glass gas discharge tube (arc tube) and a metal cap. [2] [3] They include the sodium-vapor lamp that is commonly used in street lighting. [4] [5] [2] [3] Borosilicate glass usually melts at about 1,650 °C (3,000 °F; 1,920 K).
Ultra low expansion glass has an coefficient of thermal expansion of about 10 −8 /K at 5–35 °C. [2] It has a thermal conductivity of 1.31 W/(m·°C), thermal diffusion of 0.0079 cm 2 /s, a mean specific heat of 767 J/(kg·°C), a strain point of 890 °C [1634 °F], and an estimated softening point of 1490 °C [2714 °F], an annealing point ...
Corning was the glass supplier for lightbulbs for General Electric after Edison General Electric merged with Thomson-Houston Electric Company in 1892. [34] It was an early major manufacturer of glass panels and funnels for television tubes, invented and produced Vycor (high temperature glass with
GUAYAQUIL, Ecuador (Reuters) -Ecuador's former Vice President Jorge Glas was returned to prison hours after he was temporarily evacuated for security reasons amid chaotic scenes inside the jail ...
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