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Antioxidant and long-life heat absorption and storage integrated corundum-mullite ceramic and preparation method thereof

A long-life, anti-oxidation technology, applied in the field of ceramics, can solve the problems of high-temperature oxidation resistance, low service life, and reduced heat absorption/storage performance, and achieve excellent high-temperature oxidation resistance, long service life, and improved The effect of heat absorption capacity

Active Publication Date: 2021-08-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent "Solar Thermal Power Generation Absorption / Heat Storage Integrated Corundum / SiC Ceramic Material and Its Preparation Method" (CN202010072667.8) prepared a corundum / SiC material with absorption / heat storage integrated material, and paid attention to its heat absorption And heat storage performance, its strength is 76-85MPa, high temperature oxidation resistance needs to be improved, high temperature oxidation leads to the reduction of its absorption / heat storage performance after long-term use, and the service life is not high

Method used

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  • Antioxidant and long-life heat absorption and storage integrated corundum-mullite ceramic and preparation method thereof
  • Antioxidant and long-life heat absorption and storage integrated corundum-mullite ceramic and preparation method thereof

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Embodiment 1

[0025] The present embodiment prepares described ceramics, comprises the following steps:

[0026] (1) Raw material processing: pass alumina powder and Suzhou soil through a 250-mesh sieve to prepare powder for later use;

[0027] (2) Proportioning and mixing of raw materials: Add a modifying agent to the raw materials. After each raw material and modifying agent are proportioned according to a certain mass percentage, they are evenly mixed with a ball mill for 1 hour to obtain a mixture, wherein the ball mass ratio is 1: 2;

[0028] (3) Granulation and staling: adopting spray drying method to add water with a mass of 3% to the mixture, and stale for 48 hours after granulation to obtain a blank;

[0029] (4) Semi-dry pressing molding: use a hydraulic press to press the stale blank to obtain a cylindrical solar heat storage ceramic green body, wherein the size of the green body is 800mm, the height is 100mm; the molding pressure is 90kN;

[0030] (5) Drying: place the shaped ...

Embodiment 2

[0038] The present embodiment prepares described ceramics, comprises the following steps:

[0039] (1) Raw material processing: pass alumina powder and Suzhou soil through a 250-mesh sieve to prepare powder for later use;

[0040] (2) Proportioning and mixing of raw materials: Add a modifier to the raw materials. After each raw material and modifier are proportioned according to a certain mass percentage, mix them uniformly with a ball mill for 3 hours to obtain a mixture, wherein the mass ratio of the balls is 1: 2;

[0041] (3) Granulation and staling: add 5% water by spray drying method to the mixture, and stale for more than 48 hours after granulation to obtain a blank;

[0042] (4) Semi-dry pressing molding: use a hydraulic press to press the stale blank to obtain a cylindrical solar heat storage ceramic green body, wherein the size of the green body is 800mm, the height is 100mm; the molding pressure is 120kN;

[0043] (5) Drying: place the shaped green body in a dryin...

Embodiment 3

[0051] The present embodiment prepares described ceramics, comprises the following steps:

[0052] (1) Raw material processing: pass alumina powder and Suzhou soil through a 250-mesh sieve to prepare powder for later use;

[0053] (2) Proportioning and mixing of raw materials: Add a modifying agent to the raw materials. After each raw material and modifying agent are proportioned according to a certain mass percentage, they are evenly mixed with a ball mill for 2 hours to obtain a mixture, wherein the ball mass ratio is 1: 2;

[0054] (3) Granulation and stale: adopt spray-drying method to add the water that quality is 4% to the mixture, after granulation, stale for more than 48h to obtain the billet;

[0055] (4) Semi-dry pressing molding: use a hydraulic press to press the stale blank to obtain a cylindrical solar heat storage ceramic green body, wherein the size of the green body is 800mm, the height is 100mm; the molding pressure is 105kN;

[0056] (5) Drying: place the ...

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Abstract

The invention discloses an antioxidant and long-life heat absorption and storage integrated corundum-mullite ceramic and a preparation method thereof. The ceramic is prepared from the following raw materials and modifiers in percentage by mass: 65-75 wt% of aluminum oxide, 15-20 wt% of Suzhou clay, 3-5 wt% of titanium oxide, 3-6 wt% of molybdenum oxide, 5-7 wt% of iron oxide and 2-3 wt% of nickel oxide. The ceramic prepared by the invention has excellent heat storage capacity, excellent heat storage and heat absorption capacity, high-temperature oxidation resistance, high breaking strength, good mechanical property and thermal shock resistant cycle stability, and longer service life.

Description

technical field [0001] The invention relates to the technical field of ceramics used in solar thermal power generation, and in particular to a corundum-mullite ceramic with anti-oxidation, long-life heat absorption and storage and a preparation method thereof. Background technique [0002] In a traditional solar thermal power generation system, the heat-absorbing material and the heat-storage material are two separate systems, that is, after the heat-absorbing material absorbs heat, it heats a heat transfer medium such as air or molten salt, and then heats the heat storage material by the heat transfer medium. The new generation of solar thermal power generation systems is increasingly emphasizing the integration of heat absorption and heat storage, that is, the integration of heat absorption and heat storage materials, thereby reducing energy loss during heat exchange and improving thermal power generation efficiency. For example, the Chinese invention patent "Solar thermal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/3232C04B2235/3256C04B2235/3279C04B2235/3272C04B2235/349C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607
Inventor 徐晓虹王梦瑶罗赵星兰贵能陈婧禧陆霄丞宋梦凡滕沛婷张晨
Owner WUHAN UNIV OF TECH
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