Preparation method of inorganic salt-ceramic high-temperature phase change composite heat storage material

A composite heat storage material and high temperature phase change technology, which is applied in the field of preparation of inorganic salt-ceramic high temperature phase change composite heat storage materials, can solve the problems of high material cost, poor thermal conductivity of materials, loss of phase change materials, etc. Low cost, strong adhesion, high phase transition temperature

Inactive Publication Date: 2021-07-27
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing an inorganic salt-ceramic high-temperature phase-change composite heat storage material, which solves the problems of serious loss of phase-change materials in the preparation process, high material cost and poor thermal conductivity of the material in the prior art. question

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  • Preparation method of inorganic salt-ceramic high-temperature phase change composite heat storage material

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Embodiment 1

[0035] The preparation method of an inorganic salt-ceramic high-temperature phase-change composite heat storage material of the present invention is specifically implemented according to the following steps:

[0036] Step 1, pour the phase change material NaCl (30% by mass) and SiC (69.5% by mass) as the ceramic matrix material into a mortar, mix and grind for 30 minutes, so that the materials are fully and evenly mixed, and an appropriate amount of Aluminum dihydrogen phosphate (0.5% by mass) was used as a binding agent to obtain a mixture.

[0037] Step 2. Pour the ground mixture into the specified abrasive tool, and use a powder tablet press to slowly pressurize in a one-way press. The maximum pressure is 20MPa, and the holding time is 15 minutes. Press to obtain the diameter It is a cylindrical embryo body with a height of 40mm and a height of 10mm.

[0038] Step 3: Put the green body obtained after pressing into a well-type resistance furnace, and sinter according to the...

Embodiment 2

[0043] The preparation method of an inorganic salt-ceramic high-temperature phase-change composite heat storage material of the present invention is specifically implemented according to the following steps:

[0044] Step 1, weighing the following components in sequence according to mass percentage: phase change material NaCl 30%, ceramic matrix material SiC 69%, binder aluminum dihydrogen phosphate 1%, the sum of the mass percentages of the above components is 100%;

[0045] Step 2, pouring the phase change material NaCl and the ceramic matrix material SiC into a mortar, mixing and grinding for 20 minutes, so that the materials are fully and evenly mixed, and adding aluminum dihydrogen phosphate as a binder during the grinding process to obtain a mixture;

[0046] Step 3, pour the ground mixture into the abrasive tool, use a powder tablet press to pressurize in a one-way pressurization rate: 1Mpa / min, pressurize to 15MPa, and then hold the pressure for 10 minutes , and then p...

Embodiment 3

[0049] The preparation method of an inorganic salt-ceramic high-temperature phase-change composite heat storage material of the present invention is specifically implemented according to the following steps:

[0050] Step 1, weighing the following components in sequence according to mass percentage: phase change material NaCl 25%, ceramic matrix material SiC 74%, binder aluminum dihydrogen phosphate 1%, the sum of the mass percentages of the above components is 100%;

[0051] Step 2, pouring the phase change material NaCl and the ceramic matrix material SiC into a mortar, mixing and grinding for 30 minutes, so that the materials are fully and evenly mixed, and adding aluminum dihydrogen phosphate as a binder during the grinding process to obtain a mixture;

[0052] Step 3, pour the ground mixture into the abrasive tool, use a powder tablet press to pressurize in a one-way pressurization rate: 3Mpa / min, pressurize to 20MPa, and then hold the pressure for 20 minutes , and then p...

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Abstract

The invention discloses a preparation method of an inorganic salt-ceramic high-temperature phase change composite heat storage material. The preparation method is specifically implemented according to the following steps: pouring 25-30% of a phase change material NaCl and 69-74% of a ceramic matrix material SiC into a mortar, fully mixing and grinding to fully and uniformly mix the materials, and adding 0.5-1% of aluminum dihydrogen phosphate as a binder in the grinding process to obtain a mixture; pouring the ground mixture into a grinding tool, pressurizing by using a powder tablet press in a one-way pressurizing manner, and then pressing to obtain a cylindrical blank; and putting the blank obtained after compression molding into a pit type resistance furnace, sintering, and carrying out furnace cooling to obtain the NaCl-SiC composite phase change heat storage material. According to the preparation method of the inorganic salt-ceramic high-temperature phase-change composite heat storage material, the problems of serious loss, high material cost and poor heat-conducting property of a phase-change material in the preparation process in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of heat storage material preparation methods, and relates to a preparation method of an inorganic salt-ceramic high-temperature phase change composite heat storage material. Background technique [0002] In the process of energy development and utilization, there is often an imbalance between supply and demand, resulting in irrational use of energy and energy waste. Heat storage technology is to convert various forms of energy into heat energy for storage, and release the stored heat when energy is needed. Phase change heat storage is a kind of heat storage technology, which has high heat storage density and high heat storage capacity. The thermal temperature is stable and easy to control. Heat storage materials are the core of heat storage technology, and the preparation of heat storage materials with high heat storage performance has become the key to the development of heat storage technology. Inorganic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C04B35/565C04B35/622C04B35/63
CPCC09K5/063C04B35/565C04B35/622C04B35/6309C04B2235/444C04B2235/6562C04B2235/6567C04B2235/9607
Inventor 贾晓韪摆念宗王晓宇许炳坤雷栋宋战兵
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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