Netsu Sokutei

The Measurement of Self-Discharge of Miniature Cells by Calorimetry

Hironosuke Ikeda, Nobuhiro Furukawa, Hiroshi Inokuchi, Kazuro Moriwaki

1984 Volume 11 Issue 2 Pages 51-57
Published: April 25, 1984
Released on J-STAGE: September 07, 2009

DOIhttps://doi.org/10.11311/jscta1974.11.51

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Estimated values of self-discharge rates of various miniature cells obtained by calorimetry were compared with actual values. The estimated self-discharge value of a Nickel-Cadmium battery was nearly equal to the actual value. The estimated self-discharge values of primary cells (i. e. silver oxide, mercuric oxide, alkaline manganese dioxide and lithium cells) were a little smaller than the actual values, but the temperature dependence of the former was equal to that of the latter. The application of calorimetry to cells is considered to be useful to estimate self-discharge rates of various cell systems and newly developed cell systems as well as to design a cell construction by self-discharge or to control a cell production by self-discharge.

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A New Model of DTA with High Capacity Sample Cell and Its Applications

Katsuo Ehara

1984 Volume 11 Issue 2 Pages 58-62
Published: April 25, 1984
Released on J-STAGE: September 07, 2009

DOIhttps://doi.org/10.11311/jscta1974.11.58

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A differential scanning calorimeter (DSC) using small sample cells has been widely used for studies on various solid materials.
It is very convenient to use a small sample cell for precise and reproducible measurements. But it is not always true for studies of solutions and biological materials with small enthalpy changes.
From this point of view, a new DTA system using larger sample cells with the effective volume of about 1.5cm³ was designed and tested.
A semiconductor thermoelectric module with a sensitivity of about 37.2mV/°C was used as a thermal detector and in the continuous measuring mode the sensitivity of this apparatus was 0.052mcal/s.
The approximate temperature range is from 100°C to-100°C. This system, in addition, ensures a constant cooling rate in virtue of precision electrical controller and a refrigerating technique of original design. The following analytical applications were described: (1) quality assessment of alcoholic drinks, (2) putrefaction test of green pea, (3) assessment of binding forces water absorbed in soil and clay, and (4) measurements of freezing behaviours of plant leaves.

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Emanation Thermal Analysis (ETA)

Tadao Ishii

1984 Volume 11 Issue 2 Pages 63-71
Published: April 25, 1984
Released on J-STAGE: September 07, 2009

DOIhttps://doi.org/10.11311/jscta1974.11.63

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Chemical Thermodynamics for New Aluminum Smelting (Blast Furnace) Processes

Harumi Yokokawa

1984 Volume 11 Issue 2 Pages 72-80
Published: April 25, 1984
Released on J-STAGE: September 07, 2009

DOIhttps://doi.org/10.11311/jscta1974.11.72

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Calorimetry course for beginners IV

Low-temperature calorimetry (Part 2)

H. Suga

1984 Volume 11 Issue 2 Pages 81-91
Published: April 25, 1984
Released on J-STAGE: September 07, 2009

DOIhttps://doi.org/10.11311/jscta1974.11.81

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Application of thermal analysis to the study of animal tissue in pathophysiological state

T. Hatakeyama

1984 Volume 11 Issue 2 Pages 92-93
Published: April 25, 1984
Released on J-STAGE: September 07, 2009

DOIhttps://doi.org/10.11311/jscta1974.11.92

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