Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 525515
Title A study on the differential thermal analysis of clays and clay minerals
Author(s) Arens, P.L.
Source University. Promotor(en): A.C. Schuffelen. - 's-Gravenhage : Excelsiors - 132
Publication type Dissertation, internally prepared
Publication year 1951
Keyword(s) kaoliniet - kleimineralen - kaolien - mineralen - eigenschappen - bepaling - bodemtemperatuur - meting - bodem - kaolinite - clay minerals - kaolin - minerals - properties - determination - soil temperature - measurement - soil
Categories Petrography and Mineralogy / Thermodynamics / Soil Physics
Abstract Differential thermal analysis (DTA) as a method of analysing properties of chemical compounds, more especially of clay minerals, developed rapidly, but lack of quantitative interpretations left many problems to be studied. A historical review was presented, showing the purpose of the study. Equipment was descibed in detail, with special attention to sample holders and calibration techniques.

The influences were discussed of rate of temperature rise, of type and place of the thermocouples, of packing and type of inert materials and clays, and of the adsorbed cations. Usually the effects were demonstrated with experimental curves. The theory of heat transfer was worked out and applied to the DTA. Attention was given to the problems of peak shifting. Measurements obtained with different equipment were compared and conclusions were drawn on corrections that could be made.

The author stressed the significance of the DTA method, especially in pedology. Two appendices give the solution of the differential equations used and the standardization rules for DTA equipment.

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