A Flowing Atmosphere Cold and Heat Impact Sintering Resistance Furnace

Abstract

The invention provides a flowing atmosphere hot / cold impact sintering resistance furnace which is designed for inherent defects of an existing resistance sintering furnace and the requirement for a special sintering technology of research and development of new inorganic materials. The flowing atmosphere hot / cold impact sintering resistance furnace comprises a furnace shell and hearth, a heating body, a ventilation crucible, a ventilation objective table, a hollow ventilation supporting rod, a hollow exhaust rod, a sample supporting frame, a microcomputer time switch and an electrically-controlled ventilation switch. The microcomputer time switch controls the electrically-controlled ventilation switch to be switched on so that air can flow into a sample to be sintered on the sample supporting frame of the ventilation objective table in the ventilation crucible, the sintering temperature of the sample to be sintered is lowered, the sintering temperature of the sample to be sintered is made to fluctuate from 5 DEG C to 100 DEG C periodically, and the periodical cold / hot impact function is generated for the sample to be sintered. The flowing atmosphere hot / cold impact sintering resistance furnace has the advantages that crystalline grains of the sintered sample can be made to grow coordinately in the sintering process, the crystalline grains are even in size, the phase is stably and evenly distributed, the density is high, the porosity is low, lattice deformation is lowered, and performance is better.

Description

technical field [0001] The invention relates to a resistance sintering furnace, in particular to a resistance sintering furnace for sintering inorganic materials such as ceramics under the impact of hot and cold temperatures by generating temperature fluctuations through a flowing atmosphere. Background technique [0002] Sintering is the core link in the preparation process of inorganic materials such as ceramics. During the sintering process, the material forms unique physical and chemical characteristics such as crystal structure, particle size, morphology, dislocations, and defects, so that the material has specific properties. The resistance sintering furnace is widely used in the development and production of new materials. The heat radiation of the heating body and the heat conduction of air and other media are used to heat the object. The sintered body is subjected to uniform or slowly changing heat. Relatively uniform, uniform or slow heat transfer rate. For inorg...

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Problems solved by technology

For ordinary resistance sintering furnaces for sintering inorganic materials, it is difficult to achieve rapid and non-uniform heat transfer by controlling changes in the input current of the heating body

The sintering temperature can be quickly reduced by introducing low-temperature gas into an ordinary resistance sintering furnace. At present, there are no reports at home and abroad on the resistance sintering furnace that produces temperature fluctuations through the flowing atmosphere, and then sinters ceramics and other inorganic materials under the impact of cold and heat.

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