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A kind of high temperature composite phase change heat storage material and preparation method thereof

A technology of composite phase change and heat storage materials, applied in the fields of composite heat storage materials, high temperature composite phase change heat storage materials and their preparation, can solve the problem of good chemical compatibility between matrix materials and phase change materials, and low applicable temperature of common materials , poor thermal stability and other problems, to achieve uniform appearance, stable latent heat and phase transition temperature, and good thermal stability.

Inactive Publication Date: 2016-01-20
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-temperature composite phase-change heat storage material suitable for use in industrial furnaces and its preparation method, which solves the problem of low applicable temperature of ordinary materials, poor thermal stability, heat storage Poor ability, good chemical compatibility between matrix materials and phase change materials, and molding materials, no corrosion, no pollution, easy to process and prepare

Method used

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  • A kind of high temperature composite phase change heat storage material and preparation method thereof
  • A kind of high temperature composite phase change heat storage material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0048] The preparation method of the above-mentioned high-temperature composite phase change heat storage material, the method is carried out according to the following steps:

[0049] Step 1, mixing and stirring, grinding and homogenizing:

[0050] Mix the raw materials according to the formula ratio, then dry mix the raw material mixture in a ball mill for 30 minutes, pour it out, add a polyvinyl alcohol binder with a weight of 5% of the total weight of the formula raw materials, and grind it fully in a mortar until it is mixed Uniform, obtain a semi-dry powder blank suitable for compression molding, in which:

[0051] In terms of weight percentage, the formula ratio is: white mud 5%, high alumina bauxite 25% to 45%, aluminum powder 50% to 70%, and the total weight of raw materials is 100%;

[0052] Step two, forming:

[0053] To press each blank, weigh 10g of uniformly mixed blank, and adopt a one-way pressing method in the powder tablet press, first add a molding pressure ...

Embodiment 1

[0070] This example provides a high-temperature composite phase-change heat storage material, which is composed of the following raw materials: 5 g of white mud, 45 g of high-alumina bauxite, and 50 g of aluminum powder. The high-temperature composite phase change heat storage material was prepared according to the above preparation process, and 5 g of polyvinyl alcohol binder was added in the process. The performance indicators of the prepared material are shown in Table 2.

[0071] The performance index of the material that table 2 embodiment 1 makes

[0072] Main Specifications

Embodiment 2

[0074] This embodiment provides a high-temperature composite phase-change heat storage material, which is composed of the following raw materials: 5 g of white mud, 35 g of high-alumina bauxite, and 60 g of aluminum powder. The high-temperature composite phase change heat storage material was prepared according to the above preparation process, and 5 g of polyvinyl alcohol binder was added in the process. The performance indicators of the prepared material are shown in Table 3.

[0075] The performance index of the material that table 3 embodiment 2 makes

[0076] Main Specifications

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Abstract

The invention provides a high-temperature composite phase-change heat storage material, comprising the following materials by weight percent: 5% of white mud, 25-45% of high alumina bauxite and 50-70% of aluminite powder, wherein the sum of the weight of the materials is 100%. The final finished product is obtained by mixing, agitating, grinding, homogenizing, molding, drying and sintering. The material can be used for heat preservation and waste heat recovery of various industry kiln stoves, so that the thermal efficiency of the industry kiln stoves is improved; the white mud and the aluminite powder are adopted as base materials, so that the costs of the materials can be greatly reduced; the content of the aluminite powder in the material is high, and can be up to 70% by weight at most; the material can be processed and molded, and the heat storage performance of the material is improved; in a preparation process, equipment is simple and convenient to operate, and the prepared material is simple in equipment, convenient to operate, even in appearance and good in mechanical strength; when heat circulation is carried out at the temperature of 75 DEG C, the material is good in heat stability and stable in weight loss, latent heat and phase-change temperature.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a composite heat storage material, in particular to a high-temperature composite phase change heat storage material and a preparation method thereof. Background technique [0002] Generally, the phase change materials whose working temperature is above 500°C are called high temperature phase change heat storage materials. The high temperature composite phase change heat storage material is to solve the shortcomings of a single phase change heat storage material under high temperature conditions, that is, to compound conventional materials with good compatibility with high temperature phase change and corrosion resistance. Composite energy storage materials mainly refer to heat storage materials that are composed of phase change materials and support materials, and are solid before and after use and keep their shape unchanged, also known as shaped heat storage materials. It is co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
Inventor 华建社李芳王建宏薛臣
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY