TGA - Perkin Elmer TGA 7
TGA - Perkin Elmer TGA 7

Typical sample weights are 1-30 mg, with a weight sensitivity reaching 0.1 µg. As a rule, the samples are placed in Pt cups, which are attached to a hang-down Nichrome wire with a Pt wire stir-up. The temperature is measured by a chromel-alumel thermo-couple placed below the position of the Pt cup. The accuracy of the measured temperature is limited, but can be improved by a two-point temperature calibration using suitable Curie point standards. The small, Pt wound micro-furnace allows rapid heating and cooling rates, up to 200°C/min. The system is controlled via a computer and a program written in DOS.

Capabilities/Accessories

It is recommended that larger research groups purchase their own Pt cups and stir-ups (ca. 2500 SEK each), while MACAL keeps a few sets of them for providing non-frequent users. Sets of weights and Curie point standards exist for calibrations of weight and temperature, respectively.

Example/Application areas

TG curves of Sr0.79Y0.21FeO3-δ  samples (ca. 20 mg) prepared in different atmospheres and heated in air.
TG curves of Sr0.79Y0.21FeO3-δ samples (ca. 20 mg) prepared in different atmospheres and heated in air.

 

Recharge Rates

MMK users:  50 kr/h without operator, 400 kr/h with operator and/or evaluation
Academic users: 100 kr/h without operator, 400 kr/h with operator and/or evaluation
Commercial users: 500-1000 kr per sample

Time unit: 1 hour