AGICO Advanced Geoscience Instruments Company

CS-3 Furnace Apparatus

for use with MFK1-FA / MFK1-A / KLY- 4S / KLY-3S Kappabridges
Designed for Measurement of Thermal Magnetic Susceptibility Changes of Weakly Magnetic Rocks and Synthetic Materials.
     
The CS-3 Furnace Apparatus is designed for thermal treatment of a specimen and measurement of the temperature dependence of low-field susceptibility in weakly magnetic minerals, rocks and synthetic materials, in co-operation with the MFK1-FA, MFK1-A, KLY- 4S or KLY- 3S Kappabridges.

General Description

The apparatus consists of a non-magnetic furnace with a special platinum temperature sensor, a temperature control unit and a cooling water reservoir. The specimen (up to 0.25 cm3 in volume) is placed in a silica glass vessel, heated by a platinum wire, and the temperature is measured by the temperature sensor.

To perform the susceptibility measurement at a given temperature, the equipment automatically moves the furnace into and out of the pick-up coil of the Spinner Kappabridge. The quasi-continuous process of measurement is fully automated, being controlled by the Temperature Control Unit and PC computer.

The CS-3 apparatus includes a supplement which may be used to measure temperature variations of susceptibility in argon atmosphere, in order to prevent oxidation of measured specimen.

  

Several parameters of temperature changes can be preset:

  • Maximum and minimum temperatures

  • Rate of heating and cooling.

  • Time of a specimen annealing at the maximum temperature.

The temperature variation of susceptibility of the specimen is displayed continuously on the monitor. The results are also written into a data file (in ASCII format) which can be (off line) interpreted and evaluated by included special software package CUREVAL.

The standard measured curve of temperature variation of susceptibility consists of about 500 to 700 pairs of susceptibility and temperature determinations. If a weakly magnetic specimen has been measured, the curve can be resolved into paramagnetic hyperbola and complex ferromagnetic curve.

Main Features
  • Software controlled heating and cooling modes
  • Lowest detectable susceptibility change 1x10-7 (SI)
  • Measurement in the air or argon atmosphere
  • Measurement at high temperatures up to 700 oC
  • 500 to 700 pairs of susceptibility and temperature measurements to define a thermomagnetic curve

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LABORATORY INSTRUMENTS FOR MEASUREMENT OF MAGNETIC PROPERTIES OF ROCKS