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Composite heat insulating aluminium silicate fiber/potassium hexatitanate whisker material and its preparation method

A technology of potassium hexatitanate whisker and aluminum silicate fiber, which is applied in the field of low thermal conductivity aluminum silicate fiber/potassium hexatitanate whisker composite high-temperature thermal insulation material and its preparation field, can solve the problem of high thermal conductivity and inability to Meet the application situation and other problems to achieve the effect of low thermal conductivity

Inactive Publication Date: 2008-05-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of aluminum silicate fiber products is relatively high, which cannot meet the requirements of many applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: The components of a low thermal conductivity composite high temperature insulation material are as follows, all in parts by weight:

[0018] 50 parts of aluminum silicate fiber, 30 parts of potassium hexatitanate whisker, 12 parts of starch, 2 parts of polyvinyl alcohol, 3 parts of polyaluminum chloride, and 3 parts of amide.

[0019] The aluminum silicate fiber is aluminum silicate fiber cotton with a fiber diameter of 2-4 μm and a length of 30-80 μm. The composition of the aluminum silicate fiber is: Al 2 o 3 38~50%, SiO 2 48~62%, Fe 2 o 3 2 O+Na 2 O) <0.5%, all are percentages by weight.

[0020] The potassium hexatitanate whiskers have a diameter of 2-4 μm and an aspect ratio of 10-20.

[0021] The preparation method is as follows:

[0022] Add 50 parts of aluminum silicate fiber cotton to 200 parts of water and stir to form a slurry. Subsequently, 30 parts of potassium hexatitanate whiskers were added, and while stirring, 12 parts of starch, 2 ...

Embodiment 2

[0024] Embodiment 2: As described in Embodiment 1, the difference is that the components are as follows, all in parts by weight:

[0025] 60 parts of aluminum silicate fiber, 40 parts of potassium hexatitanate whisker, 8 parts of silica sol, 10 parts of starch, 2 parts of polyvinyl alcohol, 4 parts of polyaluminum chloride, and 3 parts of amide.

[0026] The preparation method is the same as in Example 1, and the silica sol is added to the slurry before the starch and polyvinyl alcohol are added. The obtained composite heat insulation board has relatively high strength and a thermal conductivity of 0.078W / (m.K) at 800°C.

Embodiment 3

[0027] Embodiment 3: As described in Embodiment 1, the difference is that the components are as follows, all in parts by weight:

[0028] 40 parts of aluminum silicate fiber, 10 parts of potassium hexatitanate whisker, 6 parts of silica sol, 8 parts of starch, and 5 parts of polyaluminum chloride. The thermal conductivity of the obtained composite heat insulating material at 800°C is 0.070W / (m.K).

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Abstract

The composite heat insulating aluminum silicate fiber / potassium hexatitanate whisker material and its preparation belongs to the field of heat insulating technology. The composite heat insulating material consists of aluminum silicate fiber 40-65 weight portions, potassium hexatitanate whisker 10-45 weight portions, binding agent 5-20 weight portions and assistant 2-8 weight portions. The preparation process of the composite heat insulating material includes the steps of: stirring aluminum silicate fiber in water to form slurry; adding potassium hexatitanate whisker binding agent and assistant; taking out the floss, forming and stoving. The composite heat insulating material of the present invention has the features of low heat conductivity and capacity of being used in temperature up to 1200 deg.c.

Description

(1) Technical field [0001] The invention relates to a low thermal conductivity aluminum silicate fiber / potassium hexatitanate whisker composite high-temperature heat insulation material and a preparation method thereof, belonging to the technical field of heat insulation materials. (2) Background technology [0002] With the development of high-tech equipment such as ultra-high-speed aircraft and high-power engines, the problem of heat insulation has become a hot spot that people pay more and more attention to, and it has also become one of the key factors restricting the development of high-tech equipment. On the other hand, the use of low thermal conductivity insulation materials for many industrial equipment will also improve the working environment, save energy and reduce consumption. [0003] At present, the fiber insulation materials used at 1200°C are mainly aluminum silicate ceramic fiber products, including fiber cotton, fiber felt, fiber blanket, fiber paper, fiber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/81C04B35/16
Inventor 张玉军谭砂砾谭训彦龚红宇张娜
Owner SHANDONG UNIV
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