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Strong alkali-resistant aluminum oxide bubble bricks and preparation method thereof

A technology of alumina hollow balls and hollow ball bricks, which is applied in the field of refractory materials, can solve problems such as poor bonding strength, kiln pollution, and use temperature restrictions, and achieve good high-temperature thermal shock resistance, strong corrosion resistance, and good alkali resistance corrosive effect

Inactive Publication Date: 2018-08-28
江苏三恒高技术窑具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a Chinese patent CN201010520227.0, which uses alumina hollow spheres as the aggregate, α-alumina powder as the matrix, and aluminum sulfate or phosphoric acid solution as the binder. Firing at high temperature, aluminum sulfate solution is used as the binding agent. During the firing process, the low-temperature bonding strength of the green body is poor, and only standard and common aluminum oxide hollow sphere heat insulation products can be produced.
However, Chinese patent CN200310122906.2 uses phosphoric acid solution as a binding agent, and the use temperature is limited, and phosphorus-containing substances will decompose when overheated, causing pollution to the kiln.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A strong alkali-resistant alumina hollow ball brick, which is composed of the following components by mass percentage: 40% alumina hollow balls, 55% alumina micropowder and 5% aluminum titanate; the sum of the mass of the above three is also added 2~10% methylcellulose solution. The specific preparation method is: put alumina hollow spheres, alumina micropowder, aluminum titanate and methylcellulose solution in a mixing equipment for 4~6 hours to obtain a uniformly mixed mixture and seal the trapped material for 36~ 48 hours; pressurize and vibrate the mixture, and dry the green body obtained after molding for 24-36 hours, and then send it to the drying room at 60-150°C for 36-48 hours; The dried body is fired in a high-temperature kiln at a firing temperature of 1600-1700°C and a firing cycle of 40-60 hours. According to the anti-corrosion test, the aluminum oxide hollow sphere (≤1.4g / cm3) product does not appear peeling or pulverization, and the compressive strength ...

Embodiment 2

[0019] A strong alkali-resistant alumina hollow ball brick, which is composed of the following components by mass percentage: 75% alumina hollow balls, 24% alumina micropowder and 1% aluminum titanate; the sum of the mass of the above three is also added 2~10% methylcellulose solution. Concrete preparation method is with embodiment 1. According to the anti-corrosion test, the aluminum oxide hollow sphere (≤1.4g / cm3) product does not appear peeling or pulverization, and the compressive strength at room temperature is 26.8Mpa.

Embodiment 3

[0021] A strong alkali-resistant alumina hollow ball brick, which is composed of the following components in mass percentage: 50% alumina hollow balls, 47% alumina micropowder and 3% aluminum titanate; the sum of the mass of the above three is also added 2~10% methylcellulose solution. Concrete preparation method is with embodiment 1. According to the anti-corrosion test, the aluminum oxide hollow sphere (≤1.4g / cm3) product does not appear peeling or pulverization, and the compressive strength at room temperature is 22.8Mpa.

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Abstract

The invention discloses strong alkali-resistant aluminum oxide bubble bricks. The strong alkali-resistant aluminum oxide bubble bricks are prepared from aluminum oxide hollow balls used as aggregates,aluminum oxide micro powder and aluminum titanate which are used as matrixes and a methylcellulose solution used as a binding agent. In addition, the invention further discloses a preparation methodof the strong alkali-resistant aluminum oxide bubble bricks. The problem that a product is difficult to sinter is solved by the micro-nano-level aluminum oxide micro powder, so that the sintering intensity is enhanced; chemical components of the raw materials are high in purity, so that the product contains a small number of harmful chemical components and is high in corrosion resistance; by introduction of the aluminum titanate with a low thermal expansion coefficient and a high melting point, the alkaline corrosion resistance and the high-temperature thermal shock property of the product areimproved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a strong alkali-resistant alumina hollow ball brick and a preparation method thereof. Background technique [0002] Lithium batteries are a new generation of green high-energy batteries with excellent performance. They have the advantages of high working voltage, large specific energy, long cycle life, low self-discharge rate, and no memory effect. They are currently widely used in consumer electronics such as mobile phones and computers, and new energy sources. automotive, and aerospace industries. Cathode materials occupy a core position in lithium batteries, mainly including lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, etc. The wide application of lithium batteries has driven the development of cathode materials. Lithium battery cathode materials must be roasted in a high-temperature kiln, because the raw materials used in li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101C04B35/636C04B38/08
CPCC04B35/1015C04B35/6365C04B38/08C04B2235/3234C04B2235/5427C04B2235/5436C04B2235/96
Inventor 王立平王理达
Owner 江苏三恒高技术窑具有限公司
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