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Quartz glass resistance to quench performance?

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Quartz glass resistance to quench performance?

Release date:2014-06-25 00:00 Source:http://www.hongweishiying.com Views:

Quartz glass thermal expansion coefficient is small, is 5.5 × 10-7/ ℃, only ordinary glass 1/12 ~ 1/20. provisions of the standard 1200 ℃ rapidly into the cold water to the sample burning, repeated more than three times is not allowed to burst. Adding proper amount of titanium element quartz glass can also be made zero thermal expansion coefficient of the material, and has been applied in laser technology, astronomy and cutting-edge technology.
Detailed information
The expansion coefficient of transparent quartz glass is a function of the temperature: alpha 0, t=1/L0 * (Lt-L0) /t type: L0 = 0 ℃ length Lt = temperature of t ℃ length t= Celsius temperature of quartz glass viscosity, thermal conductivity, Biger and the use of temperature as shown in table 9,10,11,12,13., table 9 quartz glass viscosity (strain point, annealing, softening point and viscosity) relationship between temperature (LG η, Bo) thermal conductivity temperature crystal quartz glass synthetic quartz glass strain at 14.51075 ± 251025 ℃ ± 25 annealing at 13.01140 ± 251120 ℃ ± 25 softening point 7.61730 ± 401600 ℃ ± 40 processing range 5 ~ 81700 ~ 2100 at 1600 ~ 2000 ℃ table 10 quartz glass (c) thermal conductivity card / cm. Seconds. C transparent quartz glass opaque quartz glass 200.00331 0.00297100 0.00367 0.00345200 0.00394 0.00386300 4000.00447 0.00453500 6000.00484 0.00503700 -- -- -- 8000.00514 0.005341000 0.00547 0.005501200 0.00581 0.00569 table 11 quartz glass Biger temperature (c) Biger (kcal / G. C) transparent quartz glass opaque quartz glass -250 0.007 The use of temperature 1000.112 - 0.168 - 200.213 0.205100 - 2000.213 0.205300 0.220 0.218400 0.230 0.228500 0.224 0.237600 0.240 0.242700 0.250 0.247800 0.260 - 10000.273 - 1200 - table 12 quartz glass usage maximum continuous working temperature maximum short-term working temperature of crystal melting quartz glass 1100 ℃ is 1300 ℃ synthetic quartz glass 950 ℃± 1200 ℃ opaque quartz glass 800 table 13 ℃± 1000 ℃ quartz glass and other materials (thermal expansion value expansion 1 meters long sample value of 0 ~ 500 ℃) material (mm) 0 ~ 1000 ℃ (mm) compare the thermal expansion values (0 ~ 500 ℃, 0.27 times) of quartz glass 0.481 glass 1.8 - 5 - 6.7 of flat glass 18.3 Gao Lvzhuan 4 7.9 14.8 2.3 4.5 8.5 9 copper silicon carbide materials - Tan Sugang 31.5 7 14.9 25.9

Related Tags:Quartzinstrument

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