logoxgvb
Joined: 30 Aug 2010
Posts: 1580
Read: 0 topics
Warns: 0/5
Location: hdfttv
|
 Posted: Sat 4:43, 11 Dec 2010 Post subject: stivali ugg _800 Triple point of mercury |
|
|
Triple Point of Mercury
Triple Point is the casing for the indexing standard platinum resistance thermometer with a stainless steel container, had been in 1991 than in the PTB experiment with the PTB for the temperature difference between the container base is only 0.1inK. Using the serial number of the casing for the 7906 platinum resistance thermometer,[link widoczny dla zalogowanych], using adiabatic calorimetry i hit them 4 times experiments, the average resistance value 20.703999n, repeatability better than ± 0.1mK. Use a thermometer with, the use of continuous heating i blow a 919 in the NIM within a 5 l container experiments, the average amount of its guillotine 20.704027n, reproducibility is also excellent first】 5, No. 2 Zhang same rights, etc. : triple point of mercury 85 in-Lf1. imK compare the experimental results, NIM A 919 ~ l container vessels than the German PTB high 0.28inK. Considering their reproducibility, the difference between the range of possible 0.1inK, Yi is due to a difference in the experimental method estimates caused by the differences. 4.5 discuss the three-phase point of mercury sealed container quality is good or bad Xinjiang, = depending on the nature of the container material, the purity of mercury and filling process. In which the purity of mercury, more than 6 9 after analysis it was very difficult, in fact, according to the melting and solidification temperature range and melting to evaluate the difference between. The results of this experiment with the U.S. NIST, the experimental results are compared Furukawa, both reproducibility, melting range and melting and solidification temperature difference between, all at the same level. Therefore,[link widoczny dla zalogowanych], the purity of mercury in the sample can be considered to have reached 8 9. Reproduce the experimental triple point of mercury there are several ways to run a continuous heating method, the key is to minimize the container with the outside world and the constant exchange of heat flow Q (in the temperature at the triple point),[link widoczny dla zalogowanych], because mercury has a large thermal diffusion coefficient, regardless of the kind of approach can obtain satisfactory results. 5 Conclusion After two years of research, has formed his own three-phase point of mercury sealed container production process and a set of experimental methods, and obtained satisfactory results. Reproducibility is better than 5:0. ImK,[link widoczny dla zalogowanych], melting range 0.1inK, melting temperature and solidification temperature difference between the 0.1inK, 5 支 smell the container is less than 0.2inK. From the NIST published the data, at the same level; and Triple Point of mercury sealed container PTB comparison, consistency in the 0.28mK range. References i International Advisory Committee temperature Publicizing International Temperature Scale 1990 manual. Beijing: China Measurement Press,[link widoczny dla zalogowanych], 1990.2 Bureau of Technical Supervision Measurement Department. Additional information on the International Temperature Scale of 1990. Beijing, a measurement of the Gui-Press, 1992.3 Zhu Min. Triple Point of Mercury and its reproducibility [Master Thesis]. National Institute of Metrology, 1992t4 Huang Ningsheng. Small Triple Point of mercury sealed Preparation and reproduction. See the third-base national Cryogenic Engineering Conference Proceedings, Lanzhou, 19923l5 ~ 318.5FurukawaGT. ApplicationofSomeMetalSRMsasThermometricFixedPoint. NBSSpecialPublication260-77 (1982) DevelopingtheMercuryTriplePointZhangGuoquan, ZhuMin, WuHelian, HuangNingsheng (NationalInstituteofMetrology, 100013Beiiing) Ahstract - Themercurytriplepointisanewdefinedfixedp0tofITS'90. Thesealedcellofmercurytriplepoint, realizationapparatus, procedureandresultsoftheexperimentsaredescribed. Fin-ally. theexperimentresultsarediscussed. Thereproducibilityofthecellis ± 0.1inK · Thedifferencefromce】 1tocellislessthan0.2inK. Keywords; Mercury! Triplepoint! Roali ~ atlon! TemperatarescM. ~
相关的主题文章：
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
The post has been approved 0 times
|
|
