Method for preparing nano mullite powder from coal-based kaolin

A technology for coal-based kaolin and mullite powder, which is applied in the field of nanomaterials or ceramic materials, can solve the problems of no single-phase nanomullite powder, etc., and achieves the effects of short cycle, easy availability and uniform crystal size.

Inactive Publication Date: 2012-09-19

CHINA UNIV OF GEOSCIENCES (BEIJING)

6 Cites 13 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0008] So far, there is still no literature report on the prep...

Abstract

The invention discloses a method for preparing nano mullite powder from coal-based kaolin, which comprises the following steps: calcining to activate the raw material coal-based kaolin, and carrying out alkali fusion reaction to prepare the nano mullite powder. Compared with the existing preparation method, the product prepared by the method disclosed by the invention is single-phase nano mullite powder, the raw material is natural mineral which is cheap and accessible, and the invention has the advantages of simple equipment and short period, and is suitable for industrial production.

Application Domain

Aluminium silicatesNanotechnology

Technology Topic

MaceralMullite +3

Image

Examples

Experimental program(4)

Example Embodiment

[0034] Example 1

[0035] Activated kaolin: Using kaolin as the raw material, the temperature is raised to 1000°C at a temperature rise rate of 10°C/min, and then to 1400°C at a temperature rise rate of 5°C/min. After keeping it for 2 hours, it is naturally cooled.

[0036] Take 10g of activated kaolin as a reference, take 16g of NaOH and 100mL of distilled water; put the activated kaolin into a beaker containing NaOH solution and stir with a glass rod; seal the beaker on a magnetic heating stirrer for stirring and heating; When the temperature rises to 100°C, move the beaker to a water bath at 100°C for constant temperature hydrothermal reaction; take out the beaker after 4h, fully wash the powder in the beaker until it is neutral, vacuum and filter at 105°C After being completely dried, nano-mullite powder can be obtained.

Example Embodiment

[0037] Example 2

[0038] Activated kaolin: Using kaolin as the raw material, the temperature is raised to 1000°C at a temperature rise rate of 10°C/min, and then to 1400°C at a temperature rise rate of 5°C/min. After keeping it for 2 hours, it is naturally cooled.

[0039] Take 10g of activated kaolin as a benchmark, take 12g of NaOH and 100mL of distilled water; put the activated kaolin into a beaker containing NaOH solution and stir with a glass rod; seal the beaker on a magnetic heating stirrer for stirring and heating; When the temperature rises to 80°C, move the beaker to a water bath at 80°C for constant-temperature hydrothermal reaction; take out the beaker after 5h, fully wash the powder in the beaker until it is neutral, vacuum and filter at 105°C After being completely dried, nano-mullite powder can be obtained.

Example Embodiment

[0040] Example 3

[0041] Activated kaolin: Using kaolin as the raw material, the temperature is raised to 1000°C at a temperature rise rate of 10°C/min, and then to 1400°C at a temperature rise rate of 5°C/min. After keeping it for 2 hours, it is naturally cooled.

[0042] Take 10g of activated kaolin as a reference, take 16g of NaOH and 100mL of distilled water; put the activated kaolin into a beaker containing NaOH solution and stir with a glass rod; seal the beaker on a magnetic heating stirrer for stirring and heating; When the temperature rises to 100°C, move the beaker to a 100°C water bath for constant temperature hydrothermal reaction; after 3 hours, take out the beaker, fully wash the powder in the beaker until it is neutral, vacuum and filter it at 105°C After being completely dried, nano-mullite powder can be obtained.

PUM

Property	Measurement	Unit
Length	<= 200.0	nm
Diameter	<= 55.0	nm

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Short cycle
simple equipment

Method for preparing nano mullite powder from coal-based kaolin

A technology for coal-based kaolin and mullite powder, which is applied in the field of nanomaterials or ceramic materials, can solve the problems of no single-phase nanomullite powder, etc., and achieves the effects of short cycle, easy availability and uniform crystal size.

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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