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Ceramic fiber board and preparation method thereof

A technology of ceramic fiber board and particle size, which is applied in the field of photothermal power generation, can solve the problems of not being suitable for the solar thermal power generation industry and low solar reflectance of ceramic fiber board, and achieve improved heat insulation effect, reduced convective heat transfer, and simple operation process Effect

Inactive Publication Date: 2018-05-18
LUYANG ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the solar reflectance of the above-mentioned prepared ceramic fiberboards is all lower than 40%, which is not suitable for solar thermal power generation industry

Method used

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  • Ceramic fiber board and preparation method thereof
  • Ceramic fiber board and preparation method thereof
  • Ceramic fiber board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 45 parts by weight of standard ceramic fiber (fiber diameter 3μm, fiber length 80-100mm, Al 2 o 3 content ≥ 45%), 20 parts by weight of titanium dioxide, 10 parts by weight of zinc oxide, 20 parts by weight of hollow glass microspheres and 4 parts by weight of starch are added to the beating tank filled with water in advance, stirred at high speed, and the stirring speed is 800rpm, stirring 20min; pump the mixed material into the slurry storage tank, turn on the agitator in the slurry storage tank, add 1 part by weight of polyaluminium chloride and anionic amide with a mass ratio of 1:1, and stir until the supernatant appears around the material Liquid, the stirring speed is 200rpm, and the stirring time is 5min; the above-mentioned mixed material is dehydrated and formed by the fourdrinier drawing process, and then dried with hot air at a drying temperature of 120°C to obtain a ceramic fiber board.

Embodiment 2

[0042] Weigh 60 parts by weight of high alumina ceramic fiber (fiber diameter 2μm, fiber length 10-20mm, Al 2 o 3Content ≥ 52%), 13 parts by weight of titanium dioxide, 7 parts by weight of zinc oxide, 13 parts by weight of hollow glass microspheres and 5 parts by weight of polyurethane emulsion are added to the beating tank filled with water in advance, and stirred at a high speed to mix evenly. The stirring speed is 1000rpm. Stir for 25 minutes; pump the mixed material into the slurry storage tank, turn on the agitator in the slurry storage tank, add 2 parts by weight of polyaluminum sulfate and anionic amide with a mass ratio of 1:2, and stir until the supernatant appears around the material Liquid, the stirring speed is 400rpm, and the stirring time is 4min; the above-mentioned mixed material is dehydrated and formed through the fourdrinier drawing process, and then dried with hot air at a drying temperature of 130°C to obtain a ceramic fiber board.

Embodiment 3

[0044] Weigh 70 parts by weight of zirconium-containing ceramic fiber (fiber diameter 5 μm, fiber length 120-150 mm, Al 2 o 3 Content≥36%, ZrO 2 Content ≥ 15%), 5 parts by weight of titanium dioxide, 5 parts by weight of zinc oxide, 10 parts by weight of hollow glass microspheres and 7 parts by weight of cellulose are added to the beating tank filled with water in advance, stirred and mixed at a high speed, the stirring speed is 1200rpm, Stir for 30 minutes; pump the mixed material into the slurry storage tank, turn on the agitator in the slurry storage tank, add 3 parts by weight of polyaluminum chloride and anionic amide with a mass ratio of 1:3, and stir until the upper surface appears around the material. For the clear liquid, the stirring speed is 500rpm, and the stirring time is 3min; the above-mentioned mixed material is dehydrated and formed by a fourdrinier drawing process, and dried with hot air at a drying temperature of 140°C to obtain a ceramic fiber board.

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Abstract

The invention provides a ceramic fiber board. The ceramic fiber board is prepared from, in parts by weight, 45-70 parts of ceramic fiber, 5-20 parts of titanium dioxide, 5-10 parts of zinc oxide, 10-20 parts of hollow glass beads, 4-7 parts of a binding agent and 1-3 parts of a flocculant. The ceramic fiber is used as a base material, a functional additive is selected to endow the ceramic fiber board with high solar reflectance and low heat conductivity coefficient, and the ceramic fiber board has the average heat conductivity coefficient at 500 DEG C lower than 0.11 W / (m.K) and solar reflectance higher than 55% and is applicable to the field of solar-thermal power generation.

Description

technical field [0001] The invention relates to the technical field of photothermal power generation, in particular to a ceramic fiber board and a preparation method thereof. Background technique [0002] Solar thermal power generation is a new solar power generation method after photovoltaic power generation. It has become a new energy hotspot due to its green, pollution-free, and renewable characteristics. Photothermal power generation is in its infancy in my country, and it is a new type of sunrise industry and an important direction of new energy utilization. [0003] Some mechanical parts of the photothermal power generation system need to be insulated. While the heat insulation material is required to have a good heat insulation effect, it also needs to have a certain solar reflectivity to ensure the safety and efficiency of photothermal power generation. The average thermal conductivity of conventional ceramic fiberboard at 500°C is lower than 0.135W / (m·K), which has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/28C04B26/16C04B26/06
CPCC04B26/06C04B26/16C04B26/285C04B2201/20C04B2201/32C04B14/4625C04B14/305C04B14/30C04B14/22C04B22/12C04B24/124C04B22/148
Inventor 张成贺任大贵刘超岳耀辉刘焕英
Owner LUYANG ENERGY SAVING MATERIALS CO LTD
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