铁磁性矿物居里点测定的新方法

A NEW METHOD FOR DETERMING CURIE POINT OF FERROMAGNETIC MINERALS

本文介绍了一种测试铁磁性矿物居里点的新方法。该方法具有准确度高、重复性好,测速快、简单、直观等优点,经实际使用效果良好,文章介绍了测试原理、装置、方法和测量结果。并根据实测结果总结了居里点测定的重要意义。

A new method for determining Curie point of ferromagnetic minerals is introduced in this article. The method is to determine Curie point by observing the disappearance of magnetic hysteresis loop of ferromagnetic minerals placed in an alternating magnetic field, from the oscillograph. Following the heating of the minerals, the magnetic intensity M of the sample is reducing and when the temperature reaches Curie point, M drops to zero, the magaetic field intensity H. now only can be read, and the magnetic hysteresis loop changes to a horizonal line on the fluorescent screen of the oscillograph. It is at this magnetic inversion temperature the curie temperature is determined with thermocouple and the electric potential differencemeter.