Liquid injection sintering equipment based on high-purity strontium titanate powder material and use method

Abstract

The invention discloses liquid injection sintering equipment based on a high-purity strontium titanate powder material and a use method, and the liquid injection sintering equipment comprises a separation cavity, a first feeding hole and a second feeding hole are respectively formed in the side wall of the separation cavity in an up-down staggered manner; the screening and separating assembly is arranged at the position, corresponding to the plane where the first feeding opening is located, in the separating cavity; the mixing cavity is fixed below the separation cavity, and the center of the upper part of the mixing cavity is connected with a central pipe which is communicated with the upper part of the center of the separation cavity; and a plurality of liquid injection pipes are distributed along the periphery of the central pipe and penetrate through the separation cavity and the mixing cavity. Compared with the prior art, the method has the advantages that the fineness of material particles entering the central pipe can be changed, the energy consumption required by sintering is low, the time is short, and the purity of a strontium titanate main material in a sintered finished product is high.

Description

technical field [0001] The invention relates to the technical field of high-temperature material sintering equipment, in particular to a liquid-injection sintering equipment based on high-purity strontium titanate powder material and its use method. Background technique [0002] Sintering is the process by which a powder or powder compact is heated to a temperature below the melting point of its basic constituents and then cooled to room temperature. As a result of sintering, bonding occurs between powder particles, the strength of the sintered body increases, and the aggregates of powder particles become aggregates of crystal grains, thereby obtaining products or materials with required physical and mechanical properties. Strontium titanate can be used as electronic ceramic materials and artificial gemstones, with a chemical formula of SrTiO3 and a melting point of 2060°C. It is a high-refractive index material and a high-temperature superconducting substrate material. Due...

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Problems solved by technology

Due to the high melting point of SrTiO3, sintering SrTiO3 powder through the existing sintering furnace requires a higher temperature and a longer time, and the energy consumption is high

When sintering aids are added during sintering, when the sintering aids can form a solid solution with the sintered material, the crystal lattice will be distorted and activated, so the sintering temperature can be reduced, but the introduction of sintering aids will reduce the purity of the SrTiO3 material

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