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High silicon oxygen aluminium sol powder used for structural ceramic reinforcement, and preparation method thereof

A high-silica alumina sol and ceramic technology, applied in the field of structural ceramics, can solve the problems of reduced performance of structural ceramics, low strength of ceramic materials, insufficient strength of alumina sol, etc., to achieve improved fluidity, good practicability, and sustainable circulation The effect of using

Inactive Publication Date: 2019-11-26
JIANGSU REFUTA NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nowadays, in the hard aluminum alloy smelting process, there are certain requirements for the refractory materials of melting furnaces and holding furnaces, and the refractory materials are generally selected as structural ceramics. In the case of performance degradation, we generally add silica sol or aluminum sol during the preparation of structural ceramics, but the brittleness of silica sol is too large, and the strength of aluminum sol is insufficient. The ceramic material obtained after the addition has low strength and poor performance. Inconvenience to our alloy production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First, weigh the raw materials in proportion, including 60% of activated silica powder, 20% of activated alumina powder, 10% of composite additives, 9.99% of crosslinking agent and 0.01% of water reducer, and then put the raw materials into a high-speed mixer and mix them evenly. Afterwards, it is densified and compacted, and packaged separately to obtain the high-silica alumina sol powder.

[0040]In this embodiment, the particle diameter of the activated silica powder is 5 μm, and the content of silicon oxide in the activated silica powder is 75%; the particle diameter of the activated alumina powder is 15 μm, and the activated alumina powder The content of alumina in the medium is 90%; the particle size of the corundum fine powder is 100 μm, and the alumina content in the corundum fine powder is 93%;

[0041] The composite additive is a mixture of barium sulfate and strontium sulfate; the crosslinking agent is a mixture of citric acid, citrate and alginate; the water...

Embodiment 2

[0043] First, weigh the raw materials in proportion, including 70% of activated silica powder, 12% of activated alumina powder, 5% of corundum powder, 5% of composite additives, 2% of crosslinking agent and 6% of water reducing agent, and then put the raw materials into high-speed mixing machine to mix evenly, and after mixing, it is densely compacted and packaged separately to obtain the high-silica alumina sol powder.

[0044] In this embodiment, the particle diameter of the activated silica powder is 3 μm, and the content of silicon oxide in the activated silica powder is 85%; the particle diameter of the activated alumina powder is 10 μm, and the activated alumina powder The content of alumina in the medium is 95%; the particle size of the corundum fine powder is 85 μm, and the alumina content in the corundum fine powder is 95%;

[0045] The composite additive is a mixture of calcium fluoride and aluminum fluoride; the crosslinking agent is a mixture of methyl cellulose, b...

Embodiment 3

[0047] First, weigh the raw materials in proportion, including 60% of activated silica powder, 1% of activated alumina powder, 20% of corundum powder, 5% of composite additives, 5% of crosslinking agent and 9% of water reducing agent, and then put the raw materials into high-speed mixing machine to mix evenly, and after mixing, it is densely compacted and packaged separately to obtain the high-silica alumina sol powder.

[0048] In this embodiment, the particle diameter of the activated silica powder is 1 μm, and the content of silicon oxide in the activated silica powder is 95%; the particle diameter of the activated alumina powder is 5 μm, and the activated alumina powder The content of alumina in the medium is 98%; the particle size of the corundum fine powder is 10 μm, and the alumina content in the corundum fine powder is 98%;

[0049] The composite additive is a mixture of silicon nitride, boron nitride, silicon carbide, and boron carbide; the crosslinking agent is a mix...

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Abstract

The invention discloses a high silicon oxygen aluminium sol powder used for structural ceramic reinforcement, and a preparation method thereof. The high silicon oxygen aluminium sol powder used for structural ceramic reinforcement comprises components such as active silicon oxide micropowder, active alumina micropowder, corundum micropowder, a composite additive, a crosslinking agent, and a waterreducer. The preparation method is capable of solving a problem in the prior art that a large amount of side product flue dust is generated in production process of silicon iron alloy, metal silicon,and zirconium oxide. According to the preparation method, side product flue dust is collected using a collector, and is subjected to separation preparation to obtain active silicon oxide micropowder,production cost is reduced, waste is changed into valuables, and sustainable circulation utilization is realized. The technology design is reasonable; silica sol and aluminium sol caking property andhigh temperature resistance are improved, defects in single using of the silica sol and aluminium sol are avoided, the strength and high temperature resistance of structural ceramic prepared from thehigh silicon oxygen aluminium sol powder are improved effectively; and at the same time, the high silicon oxygen aluminium sol powder is capable of increasing material loose density through compaction, so that it is convenient for transportation and storage.

Description

technical field [0001] The invention relates to the technical field of structural ceramics, in particular to a high-silica alumina sol powder for reinforcing structural ceramics and a preparation method thereof. Background technique [0002] Hard aluminum alloys are mainly alloys based on Al-Zn-Mg-Cu series. Nowadays, due to the characteristics of low density, high strength, good processability and excellent welding performance, hard aluminum alloys are widely used in the aviation industry and Civil industry and other fields, so the production process of duralumin alloy is a problem that we urgently need to study. [0003] Nowadays, in the hard aluminum alloy smelting process, there are certain requirements for the refractory materials of melting furnaces and holding furnaces, and the refractory materials are generally selected as structural ceramics. In the case of performance degradation, we generally add silica sol or aluminum sol during the preparation of structural cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63
CPCC04B35/6316C04B2235/3213C04B2235/3215C04B2235/3217C04B2235/3821C04B2235/3826C04B2235/386C04B2235/3873C04B2235/445C04B2235/447C04B2235/5436
Inventor 李连地宋学斌
Owner JIANGSU REFUTA NEW MATERIALS CO LTD