Netsu Sokutei
Online ISSN : 1884-1899
Print ISSN : 0386-2615
ISSN-L : 0386-2615
Search
Advanced search
OR
Browse
Search
Volume 29, Issue 3
Displaying 1-7 of 7 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Heat Capacity 3. Magnetic Heat Capacity
    Michio Sorai
    2002 Volume 29 Issue 3 Pages 102-114
    Published: June 30, 2002
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.29.102
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Magnetic contributions to heat capacities of molecule-based magnets and assembled-metal complexes are explained. Although magnetic moments of both spin and electron-orbitals are involved in the magnetic phenomena occurring in the solid state, primal role is usually played by spins. Since spin is a physical quantity definitely defined by quantum mechanics, magnetic heat capacities experimentally determined are often used as a diagnostic tool to check the validity of the theoretical treatments proposed in the field of solid state physics. Discussed in this paper are (1) low-dimensionality and dimensional-crossover encountered in molecule-based magnets and assembled-metal complexes, (2) heat capacity of single-molecule-magnet under magnetic field, (3) magnetic phase transitions due to order-disorder mechanism of spin orientation, (4) spin-crossover phenomena in which the electronic state itself is altered by temperature, (5) interplay between charge-transfer and spin-state conversion, and so on.
    View full abstract
    Download PDF (2157K)
  • Formation of Molecular Alloys by Non-equilibrium Processing
    Hiroshi Suga
    2002 Volume 29 Issue 3 Pages 115-121
    Published: June 30, 2002
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.29.115
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Man has used some of his materials in non-equilibrium state for a long time. Glasses are typical example of substances in frozen-in disordered state which was realized by non-equilibrium processing. Thermodynamic characterization of molecular glasses was described briefly. Formation of non-crystalline solids by various kinds of non-equilibrium processing other than the traditional liquid cooling was discussed. Solid-state vitrification by mechanical milling and formation of molecular alloys for some binary systems were described with potential application to pharmaceuticals.
    View full abstract
    Download PDF (1326K)
  • Thermochemistry and Stability of Nuclear Waste Glasses
    Yannick Linard, Pascal Richet, Jacques Rogez, Isao Yamashita, Tooru At ...
    2002 Volume 29 Issue 3 Pages 122-130
    Published: June 30, 2002
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.29.122
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Knowledge of Gibbs free energies of dissolution is needed for the borosilicate glasses used to store nuclear waste in order to model their alteration by aqueous solutions. In this paper, we first recall that, despite the fact that glasses are nonequilibrium substances, these data can be determined experimentally from a comprehensive set of measurements. Special attention is paid to configurational entropy, which cannot be determined by calorimetric methods, but has an important contribution to Gibbs free energies of formation. The results obtained for a series of simple and complex glasses are then presented. We finally discuss the composition dependence of the thermophysical properties of sodium borosilicates, whose practical importance is not restricted to the issue of nuclear waste storage.
    View full abstract
    Download PDF (1541K)
  • [title in Japanese]
    2002 Volume 29 Issue 3 Pages 131
    Published: June 30, 2002
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.29.131
    JOURNAL FREE ACCESS
    Download PDF (139K)
  • The Development Story of The Mimippi Ear Thermometer
    K. Matsui
    2002 Volume 29 Issue 3 Pages 133
    Published: June 30, 2002
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.29.133
    JOURNAL FREE ACCESS
    Download PDF (786K)
  • Possibility of Practical Application of Zeolite Heat Pump
    T. Mizota
    2002 Volume 29 Issue 3 Pages 134
    Published: June 30, 2002
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.29.134
    JOURNAL FREE ACCESS
    Download PDF (871K)
  • Prof. T. Kawai Talks on Nanotechnology and Calorimetry
    Tomoji Kawai
    2002 Volume 29 Issue 3 Pages 135-138
    Published: June 30, 2002
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.29.135
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Chemical thermodynamics and calorimetry are strongly expected to help nano-science and nanotechnology. Thermodynamic properties of nano-materials should be characterized as functions of size and their specific structures. In the nano-world, atoms and molecules self-organize nanostructures just by thermal energy. Nanotechnology needs a theoretical guide, which describes the self-organization and nano-crystal growth in terms of chemical bonds and chemical thermodynamics. DNA network is presented as an example of nanotechnology. DNA is modified with man-made materials which provide various functions. In this example, it is emphasized again that thermodynamic comprehension is necessary to control the formation of nanostructure.
    View full abstract
    Download PDF (1945K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top