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Inorganic salt-ceramic based composite heat storage material and preparation method thereof

A technology of ceramic matrix composite and heat storage materials, which is applied in heat exchange materials, heat storage equipment, solar heat storage, etc., and can solve the problems of reducing phase change materials, reducing heat storage performance, and changing thermal resistance of composite materials.

Inactive Publication Date: 2018-05-18
TIANJIN QIZHEN ENERGY SAVING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the original composite materials have the following problems to varying degrees: the volume shrinkage and expansion of salts during the solid-liquid phase transition process will lead to changes in the thermal resistance of composite materials: the evaporation of molten salt will reduce the share of phase change materials and reduce heat storage. performance

Method used

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Examples

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preparation example Construction

[0019] Further, the present invention also provides a method for preparing the above-mentioned inorganic salt-ceramic matrix composite heat storage material, which specifically includes the following steps:

[0020] (1) will K 2 CO 3 24~32 parts, CaCO 3 20 to 28 parts and 6 to 10 parts of BeO are mixed evenly to obtain a mixture 1. According to the mass ratio of mixture 1: absolute ethanol: BeO ceramic ball = 1: 0.11 to 0.14: 0.05 to 0.10, add absolute ethanol and BeO ceramic balls were mixed and ball milled for 2-3 hours, and passed through a 200-mesh sieve to obtain slurry 1;

[0021] (2) Si 3 N 4 10-16 parts and 13-18 parts of SiC are uniformly mixed to obtain mixture 2, according to the mass ratio of mixture 2: absolute ethanol: Al 2 o 3 Porcelain balls=1:0.11~0.14:0.05~0.10, add absolute ethanol and Al to mixture 2 2 o 3 Porcelain balls, mixed ball mill for 1-2 hours, passed through a 200-mesh sieve to obtain slurry 2;

[0022] (3) Mix the above-mentioned slur...

Embodiment 1

[0028] A method for preparing an inorganic salt-ceramic matrix composite heat storage material, the method specifically includes the following steps:

[0029] (1) will K 2 CO 3 24g, CaCO 3 20g and 10g of BeO were mixed evenly to obtain mixture 1. According to the mass ratio of mixture 1: absolute ethanol: BeO ceramic balls = 1:0.11:0.05, add absolute ethanol and BeO ceramic balls to mixture 1, mix ball mill for 2 hours, and pass through 200 mesh Sieve to obtain slurry 1;

[0030] (2) Si 3 N 4 10g and SiC 18g mix homogeneously, obtain mixture 2, according to mass ratio mixture 2: dehydrated alcohol: Al 2 o 3 Porcelain balls = 1:0.11:0.05, add absolute ethanol and Al to mixture 22 o 3 Porcelain balls were mixed and ball-milled for 1.5 hours, and passed through a 200-mesh sieve to obtain slurry 2;

[0031] (3) Mix the above-mentioned slurry 1 and slurry 2, continue ball milling for 2 hours, and pass through a 300-mesh sieve to obtain slurry 3;

[0032] (4) Slurry 3 is...

Embodiment 2

[0034] A method for preparing an inorganic salt-ceramic matrix composite heat storage material, the method specifically includes the following steps:

[0035] (1) will K 2 CO 3 30g, CaCO 3 25g and BeO 6g were mixed uniformly to obtain a mixture 1. According to the mass ratio of mixture 1: dehydrated alcohol: BeO ceramic balls = 1:0.13:0.09, add dehydrated alcohol and BeO ceramic balls to the mixture 1, mixed ball mill for 3h, passed 200 Mesh sieve, obtain slurry 1;

[0036] (2) Si 3 N 4 14g and SiC 16g mix homogeneously, obtain mixture 2, according to mass ratio mixture 2: dehydrated alcohol: Al 2 o 3 Porcelain balls = 1:0.13:0.09, add absolute ethanol and Al to mixture 2 2 o 3 Porcelain balls were mixed and ball milled for 2 hours, and passed through a 200-mesh sieve to obtain slurry 2;

[0037] (3) Mix the above-mentioned slurry 1 and slurry 2, continue ball milling for 2 hours, and pass through a 300-mesh sieve to obtain slurry 3;

[0038] (4) Slurry 3 is added...

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Abstract

The invention belongs to the technical field of heat storage materials, and particularly discloses an inorganic salt-ceramic based composite heat storage material. The heat storage material is prepared from the following components in parts by weight: 24-32 parts of K2CO3, 20-28 parts of CaCO3, 6-10 parts of BeO, 10-16 parts of Si3N4 and 13-18 parts of SiC. The heat storage material has the advantage that selection and proportioning of raw materials are scientific and reasonable, a sintered material has an ultra-microporous structure, thermal and mechanical properties of the material meet requirements of industrial applications: the melting temperature is 1200-1260 DEG C, the total heat storage capacity is 170-190 J / g, and the highest use temperature of the material reaches 1300-1400 DEG C.

Description

technical field [0001] The invention belongs to the technical field of heat storage materials, and in particular relates to an inorganic salt-ceramic matrix composite heat storage material and a preparation method thereof. Background technique [0002] From the generation of this new concept to the present, heat storage composite materials have made significant progress, providing a basis for the commercialization of materials and their application in industrial heat accumulators and solar power systems. However, the original composite materials have the following problems to varying degrees: the volume shrinkage and expansion of salts during the solid-liquid phase transition process will lead to changes in the thermal resistance of composite materials: the evaporation of molten salt will reduce the share of phase change materials and reduce heat storage. performance. [0003] The purpose of this invention is to improve the performance of the inorganic salt composite heat s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C21B9/06F28D20/00F27D17/00F24S60/00
CPCC09K5/063C21B9/06F27D17/004F27D2017/007F28D20/0056Y02E60/14
Inventor 唐华
Owner TIANJIN QIZHEN ENERGY SAVING TECH CO LTD
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