Method for preparing TiFe alloy by reducing ferrotitanium oxide under microwave field

Abstract

The invention relates to a method for preparing a TiFe alloy by reducing a ferrotitanium oxide under a microwave field; and the method uses microwave heating for quickly heating titanium and iron oxides and an added reducing agent, and uses a reduction action to synthesize the TiFe alloy. The method has the following characteristics: CaH2 is adopted as the reducing agent, and is uniformly mixed with a titanium and iron oxide mixture (TiO2+Fe2O3) or a ferrotitanium ore (FeTiO3) through ball milling; and because of the characteristic of easy generation of interaction between the titanium and iron oxides and the microwave field, raw materials are uniformly heated to a temperature of 1273-1473 DEG C, and the temperature is kept by 40-80 min, so that the raw materials generate the reduction reaction under high temperature. Then, samples are cleaned by acetic acid water solution to obtain TiFe powder with a purity of 70-85%. The method is simple and feasible, overcomes the problems of high energy consumption and high raw material cost in the conventional suspension smelting precision of ferrotitanium alloys, and fully uses the advantages of speediness and high efficiency in microwave heating.

Description

technical field [0001] The invention relates to a method for a TiFe alloy, in particular to a method for preparing a TiFe alloy by reducing ferro-titanium oxide under a microwave field. Background technique [0002] With the increasingly serious environmental pollution and the gradual depletion of fossil energy, new energy, especially hydrogen energy, as a clean and pollution-free green energy has aroused great interest, and extensive development and research have been carried out on it. The key issue limiting the application of hydrogen energy is safe and reliable hydrogen storage technology. Hydrogen storage technology is mainly divided into gaseous hydrogen storage, liquid hydrogen storage and solid hydrogen storage. Solid-state hydrogen storage is the most widely studied because of its safety and high hydrogen storage density. Among the solid-state hydrogen storage materials, TiFe-based hydrogen storage alloys have attracted extensive attention due to their advantages...

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Problems solved by technology

However, this method uses a conventional resistance furnace as a heating container, and the samples in the furnace rely on the radiation heat transfer of the furnace wall to heat up, and most of the energy is consumed in the heating and insulation of the furnace itself, and the thermal conductivity of the metal oxide powder is poor, so the energy The utilization rate is low; in addition, the reducing agent metal calcium used cannot be made into powder due to its soft physical properties, so twice the chemical reaction equivalent of calcium is required to promote the reaction more fully, and the cost of raw materials is higher

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