The formation of magnetic properties in slag glass-ceramic and the effect on performance
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Ferrimagnetic glass-ceramics based on the CMAS system are successfully prepared by melting method, using two hazardousindustrial wastes as starting materials. Influences of iron oxide additions on various properties in the slag glass-ceramics havebeen investigated by using DSC, XRD, STEM, HRTEM, SEM, RUS and VSM. The results indicate that the main crystallinephases of the glass-ceramics are augite and the initial nucleation phases are magnetite. Augite as a major crystalline phase andmagnetite as a minor phase are precipitated with high iron oxide content. The comprehensive properties of glass-ceramicsshow a decreased tread with the gradual increase of the iron oxide content. The experimental data of magnetic hysteresis cyclesat room temperature are analyzed with a maximum applied magnetic field of 20 kOe. It can be noted that the variations ofhysteresis parameters in the glass-ceramics are largely dependent on content of magnetite phases.
Abstract
Ferrimagnetic glass-ceramics based on the CMAS system are successfully prepared by melting method, using two hazardousindustrial wastes as starting materials. Influences of iron oxide additions on various properties in the slag glass-ceramics havebeen investigated by using DSC, XRD, STEM, HRTEM, SEM, RUS and VSM. The results indicate that the main crystallinephases of the glass-ceramics are augite and the initial nucleation phases are magnetite. Augite as a major crystalline phase andmagnetite as a minor phase are precipitated with high iron oxide content. The comprehensive properties of glass-ceramicsshow a decreased tread with the gradual increase of the iron oxide content. The experimental data of magnetic hysteresis cyclesat room temperature are analyzed with a maximum applied magnetic field of 20 kOe. It can be noted that the variations ofhysteresis parameters in the glass-ceramics are largely dependent on content of magnetite phases.
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