GB/T 16920-2015 Translated English of Chinese Standard. (GBT 16920-2015, GB/T16920-2015, GBT16920-2015): Glass - Determination of coefficient of mean linear thermal expansionhttps://www.chinesestandard.net, 20 nov 2018 - 14 pagine This standard specifies the method for determining the coefficient of mean linear thermal expansion of elastic solid glass. This standard applies to the determination of the coefficient of mean linear thermal expansion of glass of various materials. |
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according to 5.2 accuracy amount of change annealed according applicable average linear thermal blank test C/min Calculation change in collimation change of length coefficient of average coefficient of mean coincides the pusher’s Constant temperature test cool the specimen corrected value correction term Determination of coefficient deviation diameter of 0.5 differential-pusher-type dilatometer document end-point temperature Figure A.1 formula furnace’s temperature fused silica GB/T heating furnace initial temperature t0 instrument performance length gauge length L0 linear thermal expansion mean linear thermal measured value National Light Industry nominal reference temperature perform test platinum wire positioning device pusher bar pusher’s shaft quartz glass rate of temperature-rise reference length reference temperature t0 significant digits single-pusher-type dilatometer specimen for blank specimen-bearing device specimen’s axis coincides standard bar standard materials standard replaces standard sample take two significant temperature difference temperature of t0 temperature rise temperature-rise test test of instrument test temperature transformation temperature uncorrected amount vertical