Method for preparing zirconia heat insulation material by using eiderdown as template

A technology of thermal insulation material and zirconia, applied in zirconia and other directions, can solve problems such as unfavorable locking air thermal insulation performance, and achieve the effects of low preparation temperature, broad research and application prospects, and simple process

Active Publication Date: 2012-05-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these fibers are packed together to have good thermal insulation properties, their structural morphology is not conducive to locking air and obtaining excellent thermal insulation properties.
At present, few people have studied ZrO with other morphologies. 2 Properties of Insulation Materials

Method used

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  • Method for preparing zirconia heat insulation material by using eiderdown as template
  • Method for preparing zirconia heat insulation material by using eiderdown as template
  • Method for preparing zirconia heat insulation material by using eiderdown as template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation mass percent concentration is 5% Zr(NO 3 ) 4 solution, soak the dried down in the solution for 5 minutes, and stir it slightly to accelerate the dispersion speed of the solution in the down, squeeze the soaked down in the filter to remove the excess solution, and then put it into the drying box Dry in the temperature range of 50 ° C for 48 hours, put the dried down in a crucible, and sinter and oxidize it in an electric furnace at a temperature of 600 ° C to obtain a down-like ZrO 2 Insulation materials. Prepared ZrO 2 Scanning electron microscope photographs of the microscopic morphology as figure 1 As shown, it can be seen from the figure that the material maintains the dendritic structure of down. The down-like ZrO measured 2 Compared with traditional fibrous ZrO 2 Thermal conductivity as figure 2 As shown, it can be seen from the figure that the feather-like ZrO 2 (5% solution, sintered at 600°C) has significantly lower thermal conductivity ...

Embodiment 2

[0022] The preparation mass percent concentration is 10% Zr(NO 3 ) 4 Solution, soak the dried down in the solution for 48 hours, and stir it slightly to accelerate the dispersion speed of the solution in the down, squeeze the soaked down in the filter to remove the excess solution, and then put it into the drying box Dry in a temperature range of 100°C for 3 hours, put the dried down in a crucible, and sinter and oxidize it in an electric furnace at a temperature of 1000°C to obtain down-like ZrO 2 Insulation materials. The down-like ZrO measured 2 Compared with traditional fibrous ZrO 2 Thermal conductivity as figure 2 As shown, it can be seen from the figure that the feather-like ZrO 2 (10% solution, sintered at 1000°C) has significantly lower thermal conductivity than traditional fibrous ZrO 2 , indicating a better thermal insulation effect.

Embodiment 3

[0024] The preparation mass percentage concentration is 7%Zr(NO 3 ) 4 Solution, soak the dried down in the solution for 24 hours, and stir it slightly to accelerate the dispersion speed of the solution in the down, squeeze the soaked down in the filter to remove the excess solution, and then put it in the drying box Dry in a temperature range of 75°C for 25 hours, place the dried down in a crucible, and sinter and oxidize it in an electric furnace at a temperature of 800°C to obtain down-like ZrO 2 Insulation materials. The down-like ZrO measured 2 Compared with traditional fibrous ZrO 2 Thermal conductivity as figure 2 As shown, it can be seen from the figure that the feather-like ZrO 2 (7% solution, sintered at 800°C) has significantly lower thermal conductivity than traditional fibrous ZrO 2 , indicating a better thermal insulation effect.

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Abstract

The invention relates to a method for preparing a zirconia heat insulation material by using eiderdown as a template, and belongs to the field of material science; natural eiderdown is used as a preparation template, and a zirconium nitrate solution is used as a soaking agent; and a zirconia heat insulation material with a maintained eiderdown dendritic structure is prepared; the method comprisesthe following steps: preparing a Zr(NO3)4 solution with a concentration of 5-10%; soaking eiderdown in the Zr(NO3)4 solution for 5 minutes-48 hours by using a soaking method; drying the eiderdown soaked with the Zr(NO3)4 solution in an oven at a temperature range of 50-100 DEG C for 3-48 hours; sintering the dried eiderdown in a sintering furnace at a temperature range of 600-1000 DEG C so as to prepare the zirconia (ZrO2) heat insulation material with the original eiderdown dendritic structure form. The invention has a simple process, and the obtained ZrO2 has the original eiderdown dendritic structure, and has excellent heat insulation effect and wide application prospects.

Description

technical field [0001] The invention belongs to a method for preparing zirconia heat insulating material, in particular to a method for preparing zirconia heat insulating material by using bird down. Background technique [0002] With the continuous development of material preparation technology, the use of animal and plant materials as templates to prepare new materials has attracted the attention of researchers. The down structure of birds presents a tree-like branch structure. Each down fiber uses down filaments as the main trunk, and down branches are distributed around the down filaments as branches. Ya-shaped and triangular chelates of different sizes are distributed on the down branches. . This structure can contain a large amount of still air, and air is a poor conductor of heat, so this structure plays an important role in the excellent thermal insulation properties of down. From the perspective of chemical composition, down belongs to protein fiber, mainly compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02
Inventor 王天驰孔嵩朱政强
Owner NANJING UNIV OF SCI & TECH
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