caa a22 4500 469040947 CHVBK 20180323132811.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF02847283 doi (NATIONALLICENCE)springer-10.1007/BF02847283 An apparatus for the measurement of thermal expansion of solids at low temperatures [Elektronische Daten] [Om Prakash, Ashok Rao, P Dheer] A dilatometer, using the three terminal capacitance technique, suitable for measurement of linear thermal expansion of solids in the temperature range 1.3-300 K is described. The dialtometer is designed such that the mounting system for the specimen does not undergo any significant changes in dimensions when the specimen is heated. The apparatus, therefore, yields in principle absolute values of α, the coefficient of linear thermal expansion. The performance of the apparatus has been checked by measurements on copper in the temperature range of 77-300 K. Some preliminary results on the behaviour of α for Y1Ba2Cu3O6.9 compound in the vicinity of superconducting transition temperature,T c are also described. The system can detect relative changes in length Δl/l 0 of about 10−8. Attempts are being made to improve the sensitivity. the Indian Academy of Sciences, 1992 Thermal expansion nationallicence high temperature superconductors nationallicence critical temperature nationallicence three terminal capacitance technique nationallicence mounting corrections nationallicence 06.70 nationallicence 65.70 nationallicence Prakash Om Department of Physics and Astrophysics, University of Delhi, 110 007, Delhi, India aut Rao Ashok Department of Physics and Astrophysics, University of Delhi, 110 007, Delhi, India aut Dheer P. Department of Physics and Astrophysics, University of Delhi, 110 007, Delhi, India aut Pramana Springer India 39/6(1992-12-01), 655-660 0304-4289 39:6<655 1992 39 12043 https://doi.org/10.1007/BF02847283 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02847283 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prakash Om Department of Physics and Astrophysics, University of Delhi, 110 007, Delhi, India aut NATIONALLICENCE 700 1- Rao Ashok Department of Physics and Astrophysics, University of Delhi, 110 007, Delhi, India aut NATIONALLICENCE 700 1- Dheer P. Department of Physics and Astrophysics, University of Delhi, 110 007, Delhi, India aut NATIONALLICENCE 773 0- Pramana Springer India 39/6(1992-12-01), 655-660 0304-4289 39:6<655 1992 39 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer