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Ceramic fiber material and preparation method thereof

A technology of ceramic fiber and mullite fiber, which is applied in the field of refractory materials, can solve the problems of the maximum heat resistance temperature not reaching 1500°C, poor resistance to acid and alkali corrosion and slag corrosion, powdering and falling off, and achieve high hardness. , good corrosion resistance, strong impact resistance

Active Publication Date: 2020-12-29
ALCERA (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing ceramic fiberboard has at least the following disadvantages as a refractory material for the heating surface of the furnace: 1. The maximum heat-resistant temperature cannot reach 1500°C; (alkali, acid / gas, iron oxide, etc.)

Method used

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  • Ceramic fiber material and preparation method thereof
  • Ceramic fiber material and preparation method thereof
  • Ceramic fiber material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material performance that present embodiment adopts is as follows:

[0028] Mullite fiber

[0029] Density: 95~180kg / m 3 ;Total content of slag: ≥0.212mm and ≤7.0%; Heating permanent line change: 1500℃*8hr and ≤1.5%; Chemical composition: AL 2 o 3 , 69-97%, AL 2 o 3 +SiO2 2 ≥98%.

[0030] Aluminum silicate fiber

[0031] Density: 85~198kg / m 3 ;Total content of slag: ≥0.212mm and ≤55%; Heating permanent line change: 1100℃*8hr and ≤4%.

[0032] Magnesia alumina spinel

[0033] Chemical composition: AL 2 o 3 68~79%; MgO 21~30%; SiO 2 ≤0.5%; Fe 2 o 3 ≤0.3%.

[0034] Embryo body production process:

[0035] The mullite fiber and the aluminum silicate fiber are crushed and mixed by a hydraulic machine, and the silica sol is added and stirred (stirring speed ≥ 100r / min), and the stirring time is more than 10 minutes. At the same time, the hydroxide powder, magnesium hydroxide powder and magnesium aluminum spinel powder are mixed, and a sufficient amoun...

Embodiment 2

[0042] The manufacturing process of the ceramic fiber board is as in Example 1, the difference is that during the sintering process, heating from 650°C to 1300°C for at least 10 minutes; maintaining the temperature above 1300°C for at least 20 minutes and then cooling to obtain a ceramic fiber board.

Embodiment 3

[0044] According to the method in embodiment 1, prepare the ceramic fiber board (specification: 1000 * 600 * 50mm) of following raw material formula, wherein formula 3 is not containing magnesium hydroxide powder and aluminum hydroxide powder:

[0045] Table 1 Ceramic fiber boards with different raw material formulations and specific gravity

[0046]

[0047] Note: specific gravity 1 is 300kg / m 3 ; Specific gravity 2 is 400kg / m 3 ; Specific gravity 3 is 600kg / m 3 .

[0048] The ceramic fiberboard (300kg / m2) that formula 1 makes 3 、400kg / m 3 、600kg / m 3 Specific gravity) The highest temperature is 1200°C, the average result of linear shrinkage at 1200°C*8hr is 1.3%, which is less than the requirement for ceramic fiberboard by 3%, and meets the requirement of the highest service temperature of 1200°C.

[0049] The ceramic fiberboard (300kg / m3) that formula 2 makes 3 、400kg / m 3 、600kg / m 3 Specific gravity) the highest temperature is 1500°C, and the average result of line...

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Abstract

The invention discloses a ceramic fiber material, which comprises the following raw materials: an active component and an adhesive, wherein the active component comprises mullite fibers, aluminum silicate fibers, magnesia-alumina spinel powder, Mg(OH)2 powder and AL(OH)3 powder. The invention also discloses a method for preparing the ceramic fiber material, wherein the method comprises the following steps: crushing mullite fibers and aluminum silicate fibers, and mixing to form a fiber mixture; adding silica sol into the fiber mixture, and stirring; adding water into magnesia-alumina spinel powder, Mg(OH)2 powder and AL(OH)3 powder, premixing, adding the fiber mixture, and stirring; adding water into starch, premixing to form a starch aqueous solution, adding a fiber mixture, and stirring;carrying out vacuum adsorption molding to prepare a ceramic fiber material blank; drying the blank; and sintering the blank in a high-temperature furnace, and the like. According to the invention, the highest heat-resistant temperature of the ceramic fiber material prepared by the method reaches 1500 DEG C, and the ceramic fiber material is high in strength, high in hardness, high in impact resistance and good in corrosion resistance.

Description

technical field [0001] The invention relates to refractory materials, in particular to the field of high-temperature corrosion-resistant ceramic fiber materials. Background technique [0002] Ceramic fiber is a kind of lightweight refractory material with the characteristics of light bulk density, good thermal stability, low thermal conductivity, small heat capacity, good resistance to mechanical vibration, and easy cutting and processing. In recent years, more and more industrial kilns use ceramic fiber boards instead of traditional refractory bricks as refractory materials for the heating surface of the furnace. However, the existing ceramic fiberboard has at least the following disadvantages as a refractory material for the heating surface of the furnace: 1. The maximum heat-resistant temperature cannot reach 1500°C; (Alkali, acid / gas, iron oxide, etc.) erosion, corrosion, and powdering and falling off. Contents of the invention [0003] The purpose of the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/18C04B35/622
CPCC04B35/18C04B35/622C04B2235/3206C04B2235/3217C04B2235/3418C04B2235/5216C04B2235/6567C04B2235/9669C04B2235/77C04B2235/9615
Inventor 吹野洋平孙家明
Owner ALCERA (SUZHOU) CO LTD