Naslov
An assessment of a new type of capacitance dilatometer for measurement of the thermal expansion of solids between 273 and 620 K

Autori
Horvatić, Vlasta ; Gladić, Jadranko ; Vučić, Zlatko ; Milat, Ognjen

Izvornik
Measurement Science and Technology (0957-0233) 2 (1991), 4; 381-388

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
capacitance dilatometer; thermal expansion

Sažetak
The construction of an apparatus for measuring the thermal expansion of solids, based on the three-terminal capacitor method, in the temperature range between 273 and 620 K is described. The device enables measurements to be made on samples regardless of their shape, size, conductivity or dielectric constant. The operating range can easily be extended down to 77 K requiring no changes in essential parts. Replacement of the sample is easy and fast with no need to dismantle the capacitor. The minimal change in length of the sample that can be resolved is 0.3 nm, which yields the sensitivity of 2 x IO^(-6) for a 100 micro-m long sample. The dilatometer has been calibrated using silicon, palladium and copper as the reference materials. The thermal exDansion coefficient can be determined with an accuracy of +/- 1.5%

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA