Thermal Study of the Phase Transitions in Potassium Hydrogen Sulphate KHSO_{4}

• Authors: K.K. Tahoon , A.M. Abosehly , M.M. Abdel-Kader , A.A. El-Sharkawy , F.M. El-Mansi
• Languages of publication: EN

Abstracts

EN

We report on some thermal properties (specific heat capacity C_{p}, thermal conductivity λ, and thermal diffusivity σ) in addition to the differential thermal analysis thermogram and thermogravimetric analysis for potassium hydrogen sulphate (KHS), KHSO_{4}. The accurate measurements of the above-mentioned parameters as functions of temperature revealed that the compound undergoes two structural phase transitions around 100°C and 175°C. It seems also likely that the compound behaves as a poorly conducting material and hence the maul mechanism of the heat transfer is due to phonons. The data are correlated to the crystal structure including the two different HSO¯_{4} ions.

Keywords

EN

65.40.-f; 64.70.-p

• Journal: Acta Physica Polonica A
• Year: 1994
• Volume: 86
• Issue: 3
• Pages: 349-355

Dates

published

1994-05

received

1993-06-22

(unknown)

1994-04-28

Contributors

author

K.K. Tahoon

• Physics Department, Faculty of Science, Al-Azhar University, Nasr City Cairo, Egypt

author

A.M. Abosehly

• Physics Department, Faculty of Science, Al-Azhar University, Nasr City Cairo, Egypt

author

M.M. Abdel-Kader

• Physics Department, Faculty of Science, Cairo University, Giza, Egypt

author

A.A. El-Sharkawy

• Physics Department, Faculty of Science, Al-Azhar University, Nasr City Cairo, Egypt

author

F.M. El-Mansi

• Physics Department, Faculty of Science, Cairo University, Giza, Egypt