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Aluminum oxide/silicon dioxide/aluminum titanate porous ceramic and preparation method thereof

A silica, porous ceramic technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of poor functional performance, poor thermal shock resistance and thermal insulation, waste of resources, etc., to enhance mechanical properties and thermal properties. performance, improving thermal shock resistance, and reducing thermal conductivity

Inactive Publication Date: 2012-07-04
淄博高新区联创科技服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Alumina-based porous ceramics are a class of widely used ceramic materials. The preparation process of existing alumina-based porous ceramics is complicated. The sintering temperature used is as high as 1500-1600°C, and the sintering time is as long as 30 minutes or more, resulting in high energy consumption. And additional pore-forming agents are added, which wastes resources, and the structural performance of the resulting product is low, and the fracture toughness is less than 2Mpam 1 / 2 , Bending strength is less than 120Mpa, elastic modulus is less than 100Gpa; the functional performance of the product is relatively poor, manifested in poor thermal shock resistance and heat insulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0008] Embodiment 1: Pass alumina powder, silicon dioxide powder and aluminum titanate powder through a 325-mesh standard sieve respectively, and take the under-sieve part. Then mix according to the following ratio: 40% of alumina, 40% of silicon dioxide, 5% of calcium carbonate powder, and 10% of aluminum titanate. After mixing, heat at 120°C for 6 hours to make powder for later use. Mix 5% paraffin wax evenly at 125°C to make a plasticizer for later use. Raise the temperature of the mixer to 125°C, add the prepared accelerator, and then add the above-mentioned mixed powder while stirring, continue stirring for 6 hours after all the addition, pour out and cool to make a material ingot. Use the ceramic injection molding machine to make ceramic green bodies of several shapes according to the following technical parameters: material cylinder temperature 130°C, nozzle temperature 120°C, forming pressure 4Mpa, injection time 2 seconds, pressure holding time 30 seconds , mold temp...

Embodiment approach 2

[0009] Embodiment 2: Pass the alumina powder, silicon dioxide powder and aluminum titanate powder through a 325-mesh standard sieve respectively, and take the under-sieve part. Then mix according to the following ratio: 60% of alumina, 20% of silicon dioxide, 5% of calcium carbonate powder, and 10% of aluminum titanate. After mixing, heat at 120° C. for 6 hours to make powder for later use. Mix 5% paraffin wax evenly at 125°C to make a plasticizer for later use. Raise the temperature of the mixer to 125°C, add the prepared accelerator, and then add the above-mentioned mixed powder while stirring, continue stirring for 6 hours after all the addition, pour out and cool to make a material ingot. Use the ceramic injection molding machine to make ceramic green bodies of several shapes according to the following technical parameters: material cylinder temperature 90°C, nozzle temperature 90°C, forming pressure 20Mpa, injection time 10 seconds, pressure holding time 10 seconds , mol...

Embodiment approach 3

[0010] Embodiment 3: Pass alumina powder, silica powder and aluminum titanate powder through a 325-mesh standard sieve respectively, and take the under-sieve part. Then mix according to the following ratio: 50% of alumina, 30% of silicon dioxide, 5% of calcium carbonate powder, and 10% of aluminum titanate. After mixing, heat at 120° C. for 6 hours to make powder for later use. Mix 5% paraffin wax evenly at 125°C to make a plasticizer for later use. Raise the temperature of the mixer to 125°C, add the prepared accelerator, and then add the above-mentioned mixed powder while stirring, continue stirring for 6 hours after all the addition, pour out and cool to make a material ingot. Use the ceramic injection molding machine to make ceramic green bodies of several shapes according to the following technical parameters: material cylinder temperature 120°C, nozzle temperature 110°C, forming pressure 10Mpa, injection time 6 seconds, pressure holding time 20 seconds , mold temperatur...

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PUM

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Abstract

The invention relates to aluminum oxide / silicon dioxide / aluminum titanate porous ceramic and a preparation method thereof. Aluminum oxide, silicon dioxide and aluminum titanate are taken as major raw materials; and ceramic of which the porosity is 60-80 percent is prepared from 40-60 percent by weight of aluminum oxide, 20-40 percent by weight of silicon dioxide, 5 percent by weight of calcium carbonate powder, 10 percent by weight of aluminum titanate and 5 percent by weight of paraffin. The ceramic has high mechanical performance and high thermal performance, a large quantity of air holes which are uniformly distributed are generated simultaneously, the thermal conductivity of a material is lowered, the heat insulating performance of the material is improved, and the thermal shock resistance of the material is improved.

Description

technical field [0001] The invention relates to an alumina / silicon dioxide / aluminum titanate porous ceramic and a preparation method thereof. technical background [0002] Alumina-based porous ceramics are a class of widely used ceramic materials. The preparation process of existing alumina-based porous ceramics is complicated. The sintering temperature used is as high as 1500-1600°C, and the sintering time is as long as 30 minutes or more, resulting in high energy consumption. And additional pore-forming agents are added, which wastes resources, and the structural performance of the resulting product is low, and the fracture toughness is less than 2Mpam 1 / 2 , The bending strength is less than 120Mpa, and the elastic modulus is less than 100Gpa; the functional performance of the product is relatively poor, which is manifested in poor thermal shock resistance and heat insulation. Therefore, improving the fracture performance, thermal shock resistance and heat insulation perf...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/14C04B35/622C04B38/00
Inventor 石汝军王灼朱治永刘晓东潘志粉
Owner 淄博高新区联创科技服务中心