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Electrical conductivity of sulfamic acid single crystals
Author(s) -
Santhosh Kumar A.,
Varughese G.,
Iype L.,
Rajesh R.,
Joseph G.,
Louis G.
Publication year - 2010
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201000196
Subject(s) - sulfamic acid , electrical resistivity and conductivity , atmospheric temperature range , evaporation , conductivity , single crystal , analytical chemistry (journal) , thermal conduction , chemistry , crystal (programming language) , range (aeronautics) , phase transition , materials science , crystallography , thermodynamics , nuclear chemistry , composite material , organic chemistry , programming language , physics , computer science , electrical engineering , engineering
Single crystals of sulfamic acid have been grown by the method of slow evaporation at constant temperature. DC electrical conductivity was measured in the temperature range 300 ‐ 440 K along a, b and c‐axes. Conductivity measurements show slope change near 330 K and 410 K. The slope change observed around 330 K may be attributed as due to a phase transition which has been well supported by the DSC and DTA measurements. Slope change observed around 410 K is attributed as the onset of the thermal decomcoposition as evidenced by TGA curve. TGA studies show the crystal is very stable up to 440 K. Activation energies for the conduction process are calculated for all measured crystallographic directions. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)