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Preparation method of composite ceramic mould material

A composite ceramic mold and a technology for preparing steps, applied in the field of mold materials, can solve the problems of low flexural strength, poor comprehensive performance of the mold, poor fracture toughness, etc., and achieve good dimensional stability, good comprehensive mechanical properties, and use long life effect

Inactive Publication Date: 2020-05-26
HUBEI WENSHENG MOLD PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the defect that the current traditional mold material has low flexural strength and poor fracture toughness, resulting in poor comprehensive performance of the mold, a preparation method of composite ceramic mold material is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, in parts by weight, take 30 parts of dimethyldichlorosilane, 23 parts of tung oil and 12 parts of barium oxide, put them into a high-pressure reactor, use a mixed gas to discharge the air in the reactor, and boost the pressure to 2MPa, set Set the temperature at 300°C, stir and preheat at 200r / min for 50min, the mixed gas is a mixture of nitrogen, carbon monoxide and monosilane in a volume ratio of 4:2:1; after the above preheating is completed, reduce the pressure to the standard Atmospheric pressure, take the magnesium bar with 13% mass of dimethyldichlorosilane above, ignite the magnesium bar and put it into the reactor. The discharged material was placed in a liquid nitrogen freezer, set at -20°C, and frozen for 20 minutes; after the above-mentioned freezing treatment was completed, it was naturally warmed up to room temperature, filtered, and the filter residue was collected. In parts by weight, 42 Parts of filter residue, 14 parts of sodium tungstate, 11 pa...

example 2

[0019] First, in parts by weight, take 33 parts of dimethyldichlorosilane, 24 parts of tung oil and 14 parts of barium oxide, put them into a high-pressure reactor, use a mixed gas to discharge the air in the reactor, and boost the pressure to 2.5MPa, Set the temperature at 350°C, stir and preheat at 200r / min for 60min, the mixed gas is a mixture of nitrogen, carbon monoxide and monosilane in a volume ratio of 4:2:1; after the above preheating is completed, reduce the pressure to Under standard atmospheric pressure, take the above-mentioned magnesium bar with 15% of the mass of dimethyldichlorosilane, ignite the magnesium bar and put it into the reactor. After the temperature of the reactor is stable, cool it down to 80°C at a rate of 5°C / min, and discharge the material while it is hot. Collect the discharged material, put it into a liquid nitrogen freezer, set the temperature at -15°C, and freeze for 25 minutes; after the above-mentioned freezing treatment is completed, natura...

example 3

[0021] First, in parts by weight, get 36 parts of dimethyldichlorosilane, 26 parts of tung oil and 16 parts of barium oxide, put them into a high-pressure reactor, use a mixed gas to discharge the air in the reactor, and boost the pressure to 3MPa, set Set the temperature at 400°C, stir and preheat at 200r / min for 70min, the mixed gas is a mixture of nitrogen, carbon monoxide and monosilane in a volume ratio of 4:2:1; after the above preheating is completed, reduce the pressure to the standard Atmospheric pressure, take the above-mentioned magnesium bar with 16% of the mass of dimethyldichlorosilane, ignite the magnesium bar and put it into the reactor. After the temperature of the reactor is stable, cool it down to 85°C at a rate of 5°C / min, discharge the material while it is hot, and collect The discharged material was put into a liquid nitrogen freezer, set the temperature at -10°C, and was frozen for 30 minutes; after the above-mentioned freezing treatment was completed, it...

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Abstract

The invention discloses a preparation method of a composite ceramic mould material, and belongs to the technical field of mould materials. The preparation method comprises the following steps: preheating and mixing dimethyl dichlorosilane, tung oil and barium chloride under the protection of mixed gas; reacting by taking high temperature released at the moment of combustion of the magnesium stripas a reaction condition, carrying out freezing treatment, mixing with sodium tungstate, graphite and the like and calcining at high temperature; conducting acid leaching for impurity removal, mixing with auxiliary materials such as zirconium oxide, sieving and putting into a graphite mould, calcining to obtain a composite ceramic mould material. The composite ceramic mould material is prepared from the self-made composite ceramic mold matrix, the hardness and bending resistance of the composite ceramic mould material are improved, the toughness and corrosion resistance of the composite ceramicmould material are improved, the defects that a traditional ceramic mould material is not high in bending strength and prone to brittle fracture in the using process are overcome, and the composite ceramic mould material has wide application prospects.

Description

technical field [0001] The invention discloses a preparation method of a composite ceramic mold material, which belongs to the technical field of mold materials. Background technique [0002] Ceramic materials have excellent thermal stability and wear resistance, and are ideal materials for making forming molds. They have great development prospects, but their toughness is poor, so they have not been widely used in the mold industry. Ceramic materials are expensive and lack experience in production. However, with the development of science and technology, the improvement of manufacturing technology and the increase of consumption, the cost will definitely decrease, and the application will become more and more extensive. From a long-term point of view, research and development of advanced ceramic mold materials should be started. From the existing research on ceramic molds, it can be seen that the excellent properties of ceramic materials such as high hardness, heat resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/573C04B35/622C04B35/626
CPCC04B35/573C04B35/622C04B35/62605C04B2235/3217C04B2235/3244C04B2235/3251C04B2235/326C04B2235/3279C04B2235/425C04B2235/6562C04B2235/6567C04B2235/96
Inventor 蔡重文
Owner HUBEI WENSHENG MOLD PROD CO LTD
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