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Preparation method for compact aluminum titanate ceramic

A technology of aluminum titanate and densification, applied in the field of ceramic materials, can solve problems such as complex preparation process, achieve high purity, improve microstructure and performance, and good thermal expansion performance.

Active Publication Date: 2017-12-22
无锡特科精细陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Aiming at the problems in the prior art, the present invention provides a preparation method of densified aluminum titanate ceramics, which solves the problem of complex preparation process in liquid phase synthesis in the prior art, and the method provided has strong plasticity and can customize ceramics according to requirements shape, the prepared aluminum titanate has high purity, fine structure and good uniformity

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  • Preparation method for compact aluminum titanate ceramic
  • Preparation method for compact aluminum titanate ceramic
  • Preparation method for compact aluminum titanate ceramic

Examples

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Effect test

Embodiment 1

[0054] A preparation method of densified aluminum titanate ceramics, the preparation steps are as follows:

[0055] Step 1, adding n-butyl titanate and n-butyl silicate to an aqueous ethanol solution with a dispersant, then adding aluminum nitrate, and ultrasonically stirring until completely dissolved to obtain a mixed aqueous ethanol solution;

[0056] Step 2, passing ammonia gas into the mixed ethanol aqueous solution, sealing and recirculating aeration reaction until the ammonia gas is completely dissolved, to obtain a dilute sol solution;

[0057] Step 3, adding the curing agent and dilute ferric chloride solution dropwise into the dilute sol solution, stirring until completely mixed evenly to obtain a mixed sol;

[0058] Step 4, putting the mixed sol into a vacuum distillation kettle for 2 hours of vacuum distillation to obtain a gel;

[0059] Step 5, put the gel into the mold, solidify and form under the condition of shaking and heating, and get the rough embryo after ...

Embodiment 2

[0072] A preparation method of densified aluminum titanate ceramics, the preparation steps are as follows:

[0073] Step 1, adding n-butyl titanate and n-butyl silicate to an aqueous ethanol solution with a dispersant, then adding aluminum nitrate, and ultrasonically stirring until completely dissolved to obtain a mixed aqueous ethanol solution;

[0074] Step 2, passing ammonia gas into the mixed ethanol aqueous solution, sealing and recirculating aeration reaction until the ammonia gas is completely dissolved, to obtain a dilute sol solution;

[0075] Step 3, adding the curing agent and dilute ferric chloride solution dropwise into the dilute sol solution, stirring until completely mixed evenly to obtain a mixed sol;

[0076] Step 4, put the mixed sol into a vacuum distillation kettle for 4 hours of vacuum distillation to obtain a gel;

[0077] Step 5, put the gel into the mold, solidify and form under the condition of shaking and heating, and get the rough embryo after demo...

Embodiment 3

[0090] A preparation method of densified aluminum titanate ceramics, characterized in that: the preparation steps are as follows:

[0091] Step 1, adding n-butyl titanate and n-butyl silicate to an aqueous ethanol solution with a dispersant, then adding aluminum nitrate, and ultrasonically stirring until completely dissolved to obtain a mixed aqueous ethanol solution;

[0092] Step 2, passing ammonia gas into the mixed ethanol aqueous solution, sealing and recirculating aeration reaction until the ammonia gas is completely dissolved, to obtain a dilute sol solution;

[0093] Step 3, adding the curing agent and dilute ferric chloride solution dropwise into the dilute sol solution, stirring until completely mixed evenly to obtain a mixed sol;

[0094] Step 4, put the mixed sol in a vacuum distillation kettle for 3 hours of vacuum distillation to obtain a gel;

[0095] Step 5, put the gel into the mold, solidify and form under the condition of shaking and heating, and get the ro...

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Abstract

The invention belongs to the technical field of a ceramic material and specifically relates to a preparation method for a compact aluminum titanate ceramic. The method comprises the following steps: by taking tetrabutyl titanate and aluminum nitrate as raw materials, taking an alcohol solution containing a dispersing agent as a solvent and taking butyl silicate as an internal additive; introducing ammonia gas, refluxing, aerating and reacting, thereby acquiring a gel solution; by taking ferric chloride as an external additive, adding a curing agent, reducing pressure and distilling, thereby acquiring the gel; adding the gel into a mold, vibrating, heating and curing; and raising temperature in gradient, pressurizing, drying and sintering in a muffle furnace, thereby acquiring the compact aluminum titanate ceramic. The invention solves the problem of complex preparation process of the liquid phase compound in the prior art; the method provided by the invention is high in plasticity and is capable of customizing the ceramic shape according to the requirement; the prepared aluminum titanate is high in purity, fine in structure and high in uniformity.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a preparation method of densified aluminum titanate ceramics. Background technique [0002] With the continuous development of industrial technology, the demand for materials with excellent high temperature resistance and thermal shock resistance in production technology is becoming more and more urgent. Compared with polymer materials and metal materials, ceramic materials have their remarkable characteristics: high temperature resistance, corrosion resistance, oxidation resistance, wear resistance and so on. This may be determined by its composition and structure. The bonding bonds of ceramic materials are mainly ionic bonds and covalent bonds. From the perspective of microstructure and state, most ceramic materials include crystal phase, glass phase and pores. However, during use, due to the rapid changes in ambient temperature, for example, key compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/478C04B35/624
CPCC04B35/478C04B35/624C04B2235/443C04B2235/444C04B2235/48C04B2235/483C04B2235/6023C04B2235/604C04B2235/606C04B2235/656C04B2235/6567C04B2235/6583C04B2235/96C04B2235/9669
Inventor 刘名剑王征
Owner 无锡特科精细陶瓷有限公司
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