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Ceramic crucible for microwave heating molten metal

A ceramic crucible, melting metal technology, applied in crucibles, crucible furnaces, lighting and heating equipment, etc., can solve the problems of high energy consumption, fast heating speed, long cycle, etc., achieve low thermal conductivity, prevent immersion, high heat resistance The effect of impact performance

Inactive Publication Date: 2010-04-14
TIANJIN UNIV
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Problems solved by technology

[0002] Steelmaking, metallurgy, casting and other industries often need to melt metals for testing and testing. The traditional method is to put metal or metal-containing samples in ceramic crucibles and use traditional heating methods such as high-temperature electric furnaces to melt them. The disadvantages of this type of method are long cycle and high energy consumption. The microwave heating metal technology developed in recent years can effectively reduce the melting cycle and shorten the melting time. However, due to the fast heating speed, the thermal shock resistance of traditional ceramic crucibles cannot meet the requirements. In order to improve To improve the thermal shock resistance of ceramic crucibles, it is necessary to increase the porosity of the crucible, which will lead to the problem of adhesion between the crucible and the molten metal

Method used

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Embodiment Construction

[0014] 6.4 kg of zirconia with the largest particle size less than 1 μm and an average particle size of 0.6 μm, 1.6 kg of zirconia with a size of 20-60 μm and an average particle size of 46 μm, 2 kg of lanthanum phosphate with an average particle size of 1 μm, 200 grams of carboxymethyl cellulose, and 3 kg of water. Ball mill and mix for 4 hours, pour into a gypsum mold with a weight ratio of paste to water of 100:70, the diameter of the mold is 100 mm, and the height is 150 mm; after the slurry is sucked up to 8 mm, the remaining slurry is exported, and the green body is taken out from the mold after drying. Fire in the furnace at 1600°C for 4 hours, and obtain a ceramic crucible after cooling with the furnace. The crucible can directly melt steel, iron, aluminum, copper and other metals under the condition of microwave heating. The melting process does not burst, and the heat insulation effect with the environment is good, and it does not adhere to high-temperature metals.

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Abstract

The invention provides a ceramic copple for microwave heating and melting metal, belonging to the advanced ceramic technical field. The copple adopts the sub-micron and the micro-sized stabilized zirconia powder to form certain grain composition; the component of La-monazite is added, the pulp is made by the ball milling and mixing and the copple shape is formed by grunting and is baked at a temperature of 1600 to 1700 DEG C. The copple has the advantages of heat resistance performance, heat insulation performance and resistance to heat shocks, is not stuck with high temperature molten metal and has the function of microwave absorption.

Description

technical field [0001] The invention belongs to the technical field of advanced ceramics; in particular, it relates to a zirconia ceramic crucible used for microwave heating and melting metal. Background technique [0002] Steelmaking, metallurgy, casting and other industries often need to melt metals for testing and testing. The traditional method is to put metal or metal-containing samples in ceramic crucibles and use traditional heating methods such as high-temperature electric furnaces to melt them. The disadvantages of this type of method are long cycle and high energy consumption. The microwave heating metal technology developed in recent years can effectively reduce the melting cycle and shorten the melting time. However, due to the fast heating speed, the thermal shock resistance of traditional ceramic crucibles cannot meet the requirements. In order to improve To improve the thermal shock resistance of ceramic crucibles, it is necessary to increase the porosity of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B14/00B01L3/04C04B35/482
Inventor 刘家臣汪彩芬吴蔚翟羽佳杜海燕
Owner TIANJIN UNIV
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