Physical Properties of Titanium. III. The Specific Heat

Abstract

The specific heat of titanium has been measured over a temperature range from 600° to 1345°K. The specific heat at 600°K is 0.72 J/g°K ±2.5%, and increases to 0.93 J/g°K ±6% just below the transition, which takes place at 1155°K. Above this point the specific heat drops to 0.75 J/g°K ±4%, where it appears to remain fairly constant. The increase of the specific heat to 1.7 times the Dulong and Petit value is interpreted as an effect of anharmonic terms in the potential of the atomic oscillators, as proposed by Born and Brody. The samples were heated by alternating current, varying in frequency from 8.63 to 14.35 cps, causing a temperature fluctuation at twice the heating current frequency, and a resultant resistance fluctuation. The resistance fluctuation was observed electrically, and from it, through the measured temperature coefficient of resistance, the temperature fluctuations and specific heat were calculated.