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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] 1. Preparation of translucent honeycomb ceramic carrier

[0025] The base material α-Al 2 O 3 , The sintering aid Mg and the precursor nitrate of rare earth are mixed in an appropriate proportion, and calcined at 400~500℃ to decompose the nitrate, and the obtained oxide powder is then mixed with an appropriate amount of binder, lubricant, defoamer and distilled water Mixing, through mechanical mixing, kneading, and then vacuum degassing, to efficiently remove bubbles in the mud, and then form plastic mud through aging; the mud is extruded through a mold under a pressure of 15-30MPa , The wet green body is obtained; the wet green body is cut into a certain thickness of honeycomb ceramic dry green body after radio frequency drying.

[0026] The dry body is calcined twice, the first time is 1100~1300 calcination in air atmosphere for 1~2h; the second time is under vacuum state or under the protection of hydrogen flow, using programmed heating method to calcine to 1700~1900℃, ke...

Example Embodiment

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

[0055] According to the above-mentioned embodiment, 40 pieces of visible light translucent honeycomb ceramic carriers were prepared. The preparation method and various parameters measured on the samples are as follows:

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

[0057] The base material is α-Al 2 O 3 , Is the purity of 4N (content 99.99%) AlNH 4 (SO 4 ) 2 ·XH 2 O(x=6~24), calcined by temperature program to 1200℃, and then ground to obtain α-Al with purity greater than 99.95% and average grain size 0.1~0.5μm 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 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 of analytical grade.

[0059] Lubricant is glycerin, the mass component in the mixed raw material is 3; the binder is hydroxypropyl cellulose, the mass component i...

Example Embodiment

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

[0073] The mass parts of the sintering aid in Example 1 is halved, that is, 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 alumina, the lubricant is glycerin, the binder is hydroxypropyl cellulose, the defoamer is n-butanol, and the mass parts of distilled water remain unchanged. At the same time, the process and inspection items such as raw material mixing and processing, dry body preparation and cutting, and firing system are also the same as those in Example 1. The test results of the prepared three-dimensional honeycomb ceramic mesh sample are:

[0074] The dimensions, wall thickness, axial and radial compressive strength, bulk density and other indicators of the sample are the same as those of Example 1, but the light transmittance of the sample is reduced to 8%, indicating that the amount of sintering aid has a greater effect on light t...

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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
CPCY02A20/212Y02W10/37C04B41/5041B01D53/86B01J27/24B01J35/004B01J35/04C02F1/30C02F2305/10C04B35/10C04B35/622C04B35/6365C04B35/64C04B41/009C04B41/85C04B2235/661C04B41/4537
Inventor 孔令仁孔德双谷昌军刘志斌
Owner JIANGSU GAOCHUN CERAMICS
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