A kind of high-silicon mullite with the structure remains of gramineous plants and its preparation method

A grass and mullite technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of underutilization, complex production process, invariability, etc., to avoid waste of raw materials and simple production process. , the effect of broad social and economic values

Active Publication Date: 2016-01-20
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defects of the above methods are as follows: (1) carbonizing natural plants as templates or using their natural structures alone, failing to make full use of other chemical components in natural plants such as SiO 2 , indirectly causing waste; (2) The production process is complex and requires multiple processes to complete; (3) The stomata of the product are all copied plant structure holes, which are not variable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of high-silicon mullite with the structure remains of gramineous plants and a preparation method thereof. The preparation method is as follows: using 10-20wt% gramineous plants as a template, using 80-90wt% aluminum sol as an impregnating agent, impregnating for 3-5 hours under normal pressure, and stirring evenly; Gramineae plants are baked at 60-100°C for 24-28 hours, and then kept at 1350-1400°C for 2-4 hours to obtain high-silicon mullite with gramineous plant structure.

[0016] In this embodiment: the pH value of the aluminum sol is 3.4-3.8, and the solid content is 4.0-5.0wt%; the grass plant is bran.

[0017] The specific surface area of ​​the high-silica mullite stone of the gramineous plant structure remains state that the present embodiment 1 makes is 20~22m 2 / g, the porosity is 50~55%, and the average pore diameter is 0.5~1.0μm.

Embodiment 2

[0019] A kind of high-silicon mullite with the structure remains of gramineous plants and a preparation method thereof. The preparation method is as follows: use 20-30wt% gramineous plants as a template, use 70-80wt% aluminum sol as an impregnating agent, impregnate for 5-8 hours under normal pressure, and stir evenly; Gramineae plants are baked at 70-110°C for 28-32 hours, and then kept at 1300-1350°C for 4-8 hours to obtain high-silicon mullite with the remains of grass plants.

[0020] In this embodiment: the pH value of the aluminum sol is 3.2-3.4, and the solid content is 3.0-4.0wt%; the grass plant is bran.

[0021] The specific surface area of ​​the high-silicon mullite of the gramineous plant structure remains state obtained in the present embodiment 2 is 22 ~ 24m 2 / g, the porosity is 55~60%, and the average pore diameter is 1.0~1.5μm.

Embodiment 3

[0023] A kind of high-silicon mullite with the structure remains of gramineous plants and a preparation method thereof. The preparation method is as follows: use 30-40wt% gramineous plants as a template, use 60-70wt% aluminum sol as an impregnating agent, impregnate under normal pressure for 8-10 hours, and stir evenly; Gramineae plants are baked at 80-120°C for 32-36 hours, and then kept at 1250-1300°C for 8-10 hours to obtain high-silicon mullite with the remains of grass plants.

[0024] In this embodiment: the pH value of the aluminum sol is 3.0-3.2, and the solid content is 2.5-3.0 wt %; the gramineous plant is rice husk.

[0025] The specific surface area of ​​the high-silica mullite stone of the gramineous plant structure remains state that the present embodiment 3 makes is 24~26m 2 / g, the porosity is 60~65%, and the average pore diameter is 1.5~2.0μm.

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Abstract

The invention relates to a high-silicon mullite with the remains of grass plant structure and a preparation method thereof. The technical scheme is: use 10~70wt% gramineous plants as template, use 30~90wt% aluminum sol as impregnating agent, impregnate under normal pressure or 103~104Pa for 3~24h, stir evenly; The gramineous plants of the aluminum sol are baked at 60-200°C for 24-48 hours, and then kept at 1100-1400°C for 2-12 hours to obtain the high-silicon mullite of the gramineous plant structure. The invention not only completely preserves the intrinsic structure of natural plants, but also forms mullite nanoparticles on the pore walls and surfaces of natural plants, which not only refines the pore structure, but also enhances its skeleton strength, high temperature volume stability and Acid and alkali corrosion resistance, the intrinsic structure of this porous form has a large specific surface area, and has great potential in the fields of high temperature insulation, catalyst carrier and so on.

Description

technical field [0001] The invention belongs to the technical field of high silicon mullite. In particular, it relates to a high-silicon mullite with the structure remains of a grass plant and a preparation method thereof. Background technique [0002] Remains materials are borrowed from the multi-level, multi-dimensional, and multi-structural intrinsic structures of organisms that have passed through hundreds of millions of years in nature. Through artificial synthesis methods, their structural components are changed to prepare biological fine structures that retain the nature. Composite, artificially endowed materials with properties and functions. It mainly introduces the mechanism of plant templates into the synthesis of inorganic materials and the preparation of composite materials. Using natural plants as templates, various porous materials with distinct plant structure characteristics, unique microstructure, and controllable physical and mechanical properties are pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B35/622C04B35/185
Inventor 李远兵刘静静李淑静李亚伟桑绍柏
Owner WUHAN UNIV OF SCI & TECH
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