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A kind of high temperature resistant solar energy collector ceramic material and preparation method thereof

A technology for solar heat collection and ceramic materials, which is applied in the field of high-temperature-resistant solar heat-collection ceramic materials and its preparation, can solve problems such as attenuation of high-temperature mechanical properties, and achieve high-temperature oxidation resistance, good heat collection effect, and simple preparation process Effect

Active Publication Date: 2021-08-27
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicon carbide ceramics have a high service temperature, but their high-temperature mechanical properties are seriously attenuated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh SiC 45% according to mass percentage, HfB 2 35%, Al 2 o 3 -Y 2 o 3 -MgO composite sintering aid 12%, B 4 C2%, carbon black 6%. Add 5% polyvinylpyrrolidone dispersant, 0.3% carboxymethyl cellulose binder, use zirconia balls as the grinding medium, the material: water mass ratio is 50:35, and ball mill in water at a speed of 110r / min for 12 hours. , to obtain slurry. The slurry was stale for 32 hours. The slurry is poured into a gypsum mold and cast into a mold to obtain a green body. Dry the body in an environment with a temperature of 55°C and a humidity of 65% until the moisture content is less than 1%. Place the dried green body in a pressureless sintering furnace, raise the temperature to 2100°C at 5°C / min in an inert gas, keep it for 5 hours, then cool down to 400°C at 5°C / min, and finally cool down naturally to room temperature to obtain SiC / HfB 2 Solar collector ceramics.

[0028] The SiC / HfB 2 The room temperature flexural strength of solar co...

Embodiment 2

[0030] Weigh SiC 40% according to mass percentage, HfB 2 35%, Al 2 o 3 -Y 2 o 3 -MgO composite sintering aid 16%, B 4 C3%, carbon black 6%. Add 6% polyvinylpyrrolidone dispersant, 0.4% carboxymethyl cellulose binder, use zirconia balls as grinding medium, material: water mass ratio is 55:38, ball mill and mix in water at a speed of 120r / min for 14 hours , to obtain slurry. The slurry was stale for 30 hours. The slurry is poured into a gypsum mold and cast into a mold to obtain a green body. Dry the body in an environment with a temperature of 50°C and a humidity of 60% until the moisture content is less than 1%. Place the dried green body in a pressureless sintering furnace, raise the temperature to 2080°C at 4°C / min in an inert gas, keep it for 4 hours, then cool down to 400°C at 5°C / min, and finally cool down naturally to room temperature to obtain SiC / HfB 2 Solar collector ceramics.

[0031] The SiC / HfB 2The room temperature flexural strength of solar collecto...

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Abstract

The invention relates to a high-temperature-resistant solar heat-collecting ceramic material and a preparation method thereof, which is composed of components containing the following weight percentages: SiC 35-55%, HfB 2 25‑45%, Al 2 o 3 -Y 2 o 3 ‑MgO composite sintering aid 10‑18%, B 4 C 1‑3%, carbon black 3‑8%, high temperature resistant SiC / HfB prepared by slip casting and pressureless sintering process 2 Solar collector ceramics. The use temperature of the high-temperature-resistant solar heat-collecting ceramics of the present invention is as high as above 1500° C., which can solve the problem of serious attenuation of high-temperature mechanical properties of the current solar heat-collecting ceramics. Moreover, the preparation method has simple process and high production efficiency.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a high-temperature-resistant solar heat-collecting ceramic material and a preparation method thereof. Background technique [0002] With the depletion of fossil energy and the increasing global warming and environmental pollution, human beings have been trying to find a clean, safe and economical alternative energy. As an inexhaustible renewable energy, solar energy has become a hot spot in the development and utilization of new energy due to its infinite storage, universal distribution, clean utilization, and economical development. . Solar thermal power generation is an important aspect of solar energy utilization. It uses a concentrator to focus solar energy, and after being absorbed by an absorber, it is converted into heat energy to generate high-temperature steam or gas that enters a steam turbine generator set or a gas turbine generator set to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/64
CPCC04B35/565C04B35/64C04B2235/3206C04B2235/3217C04B2235/3225C04B2235/3813C04B2235/3821C04B2235/424C04B2235/668C04B2235/96
Inventor 孙海滨王振伟郭学李蛟杜庆洋张振昊
Owner SHANDONG UNIV OF TECH
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