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Preparation method of semitransparent honeycomb ceramic having visible light catalysis function

A technology of honeycomb ceramics and honeycomb ceramic carriers, which is applied in the direction of ceramic products, physical/chemical process catalysts, household appliances, etc., can solve the problems that have not been reported on translucent honeycomb ceramics, and have not seen the treatment of waste gas and waste water. Photocatalytic reaction efficiency, good economic and social benefits, and the effect of efficiency improvement

Inactive Publication Date: 2016-05-11
JIANGSU GAOCHUN CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, so far only the invention patent "CN105198474A for the preparation of a visible light translucent three-dimensional honeycomb ceramic network" proposed and publicized by the same inventor as the present invention has been found, and other related reports have not been found
[0005] However, there have been no reports on translucent honeycomb ceramics with visible light catalytic function at home and abroad so far.
There is no report on using this technology and material to treat waste gas and waste water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] 1. Preparation of translucent honeycomb ceramic carrier

[0025] The matrix raw material α-Al 2 o 3 , the sintering aid Mg and the rare earth precursor nitrate are mixed in an appropriate proportion, and calcined at 400-500°C to decompose the nitrate, and the obtained oxide powder is mixed with an appropriate amount of binder, lubricant, defoamer and distilled water Mixing, through mechanical mixing, kneading, and then vacuum degassing and refining, so that it can efficiently remove the air bubbles in the mud, and then make it into a plastic mud through aging; the mud is extruded through a mold under a pressure of 15-30MPa , to obtain a wet green body; the wet green body is cut into a honeycomb ceramic dry body with a certain thickness after being dried by radio frequency.

[0026] The dry green body is calcined twice, the first time is calcined at 1100-1300 °C for 1-2 hours in an air atmosphere; the second time is calcined at 1700-1900 ° C by temperature programming ...

Embodiment 1

[0054] Embodiment 1: One of translucent honeycomb ceramic carriers.

[0055] According to the above embodiment, 40 visible light translucent honeycomb ceramic carriers were obtained. The various parameters measured by the manufacturing method and samples were as follows:

[0056] (1) Raw materials and mixed mass parts

[0057] The base material is α-Al 2 o 3 , is AlNH with a purity of 4N (content 99.99%) 4 (SO 4 ) 2 ·xH 2 O (x = 6 ~ 24), by heating up to 1200 ° C for calcination, and then grinding to obtain α-Al with a purity greater than 99.95% and an average grain size of 0.1 ~ 0.5 μm 2 o 3 , the number of mass components in the mixed raw material is 100.

[0058] Sintering aid: Y(NO 3 ) 3 ·6H 2 The mass component number of O in the mixed raw material is 0.2, La(NO 3 ) 3 ·6H 2 O is 0.2, Mg(NO 3 ) 2 ·6H 2 O is 0.4, and all reagents are analytically pure.

[0059] The lubricant is glycerin, and the number of mass components in the mixed raw material is 3; the...

Embodiment 2

[0072] Embodiment 2: The second translucent honeycomb ceramic carrier.

[0073] The mass fraction of sintering aid in embodiment 1 is halved, i.e. Y(NO 3 ) 3 ·6H 2 O is 0.1, La(NO 3 ) 3 ·6H 2 O is 0.1, Mg(NO 3 ) 2 ·6H 2 O is 0.2, and the base material is aluminum oxide, the lubricant is glycerin, the binder is hydroxypropyl cellulose, the defoamer is n-butanol and the mass fraction of distilled water is constant. At the same time, the processes and testing items such as raw material mixing and processing, dry green body preparation and cutting, and firing system are also kept the same as in Example 1. The test results of the three-dimensional honeycomb ceramic mesh sample are as follows:

[0074] The appearance size, wall thickness, axial and radial compressive strength, bulk density and other indicators are the same as those of the sample in Example 1, but the light transmittance of the sample drops to 8%, which shows that the influence of the amount of sintering aid...

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Abstract

The invention provides a preparation method of a semitransparent honeycomb ceramic having a visible light catalysis function. A photocatalyst film is supported on a semitransparent honeycomb ceramic carrier, and the step includes the two preparation steps of preparing the semitransparent honeycomb ceramic carrier and supporting the photocatalyst film: firstly, a visible light semitransparent aluminum oxide honeycomb ceramic carrier is prepared, then a sol-gel method is adopted to support rare earth and nitrogen co-doped TiO2 sol on the carrier, and the nanoscale-thickness uniform and transparent photocatalyst film is formed through sintering. The catalyst film of the semitransparent honeycomb ceramic carrier can respond to visible light to play a catalysis effect, and the carrier also has semi-transparency to the visible light so that the visible light can be effectively utilized and the photocatalytic efficiency can be improved. Accordingly, a practical material is provided for achievement of solar photocatalysis treatment to pollution.

Description

technical field [0001] The invention relates to the preparation of visible light transparent and photocatalytic functional ceramics, and belongs to the technical field of inorganic non-metallic material manufacturing. Background technique [0002] Generally, ceramics are opaque due to the presence of impurities and pores inside. If high-purity raw materials are selected and pores are eliminated through a specific process, transparent ceramics may be obtained. The process includes powder preparation, molding, sintering, and post-treatment. At present, Al 2 o 3 , Y 2 o 3 , MgO, CaO, TiO 2 , ThO 2 , ZrO 2 Equal oxide transparent ceramics, and AlN, ZnS, ZnSe, MgF 2 , CaF 2 and other non-oxide transparent ceramics. Transparent ceramics not only have good transparency, but also have corrosion resistance, high temperature resistance, high strength, excellent dielectric properties, low electrical conductivity, high thermal conductivity and other properties, and have become...

Claims

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Application Information

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IPC IPC(8): C04B41/85C04B38/00C04B35/10C04B35/64C04B35/636C04B35/622B01J27/24B01J35/04C02F1/30B01D53/86
CPCB01D53/86C02F1/30C04B35/10C04B35/622C04B35/6365C04B35/64C04B41/009C04B41/5041C04B41/85B01J27/24C02F2305/10C04B2235/661B01J35/56B01J35/39C04B41/4537Y02W10/37Y02A20/212
Inventor 孔令仁孔德双谷昌军刘志斌
Owner JIANGSU GAOCHUN CERAMICS
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