Browsing by Author "Kennedy, Catherine A."
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Heat capacity, lattice dynamics, and thermodynamic stability of the negative thermal expansion material HfMo2O8
Kennedy, Catherine A.; White, Mary Anne; Wilkinson, Angus P.; Varga, Tamas (2007-06)We explore the lattice dynamics of the negative thermal expansion material, cubic HfMo2O8, through analysis of its heat capacity (measured from 0.5 to 300 K) and its room-temperature Raman spectrum. Its heat capacity is ... -
Low thermal conductivity of the negative thermal expansion material, HfMo2O8
Kennedy, Catherine A.; White, Mary Anne; Wilkinson, Angus P.; Varga, Tamas (2007-04)The thermal conductivity of the cubic polymorph of hafnium molybdate, HfMo2O8, was determined over the temperature range of 2-400 K. The values of thermal conductivity were low (0.64 +/- 0.15 W m(-1) K-1 at T=300 K for a ... -
Technique for determination of accurate heat capacities of volatile, powdered, or air-sensitive samples using relaxation calorimetry
Marriott, Robert A.; Stancescu, Maria; Kennedy, Catherine A.; White, Mary Anne (2006-09)We introduce a four-step technique for the accurate determination of the heat capacity of volatile or air-sensitive samples using relaxation calorimetry. The samples are encapsulated in a hermetically sealed differential ...