Abstract
Particle sintering technology was used to transform Niobium Tantalum Tailings (Nb-Ta tailings) into glass ceramic products. CaO, ZnO and BaO were used to adjust the composition of the glass. β-wollastonite was found present as the major crystalline phase in all treated samples. With the CaO increasing, the intensity of crystal diffractive peaks is also increasing. The formation of β-wollastonite crystal can be accelerated by the increasing of CaO. The sintering is processed under the participation of liquid phase, and increase of sintering temperature does a great favor on descending the liquid phase viscosity of glass particles, which consequently is available for sintering. The density and sintering quality of the samples prepared by two-step sintering are higher than that of one-step sintering. With the sintering temperature increasing, the surface of the samples become better and have beautiful luster.
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