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An apparatus for obtaining temperatures from 4·2 to 0·3° K

✍ Scribed by A.D. Shvets

Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
218 KB
Volume
7
Category
Article
ISSN
0011-2275

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✦ Synopsis

The apparatus works in the following way. On opening valves 4, 11, and 12, liquid nitrogen flows into nitrogen dewar 10 and its level is maintained above the top of the helium dewar, speeding up the cooling of the apparatus

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Heat capacity of potassium tungstates K2
Heat capacity of potassium tungstates K2WnO3n + 1(n =  2, 3, 4) at temperatures from 273 K to 979 K
✍ Q. Chen; S. Liu; P. Zhang 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 92 KB

Compounds K 2 W n O 3n+1 (n = 2, 3, 4) were synthesized using a pyrometallurgical technique. The products were characterized by X-ray diffraction analysis and found to be single-phase compounds. The enthalpy increments T 273.15 K H o m of each compound were measured by a drop method using a high-tem