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Inorganic porous ceramic material and preparation method thereof

A ceramic material and inorganic porous technology, which is applied in the field of inorganic porous ceramic materials and their preparation, can solve the problems of non-porous inorganic ceramic materials, and achieve the effect of low cost and simple process

Inactive Publication Date: 2010-07-21
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are reports of inorganic or organic materials containing boron and iron at the same time, they usually do not contain magnesium, iron, boron, and oxygen at the same time, and they are not porous inorganic ceramic materials.

Method used

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  • Inorganic porous ceramic material and preparation method thereof
  • Inorganic porous ceramic material and preparation method thereof

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Embodiment 1

[0030] According to the material dry mixing and sintering process, Mg is used as the magnesium source, Fe(OH) 3 is the iron source, H 3 BO 3 As the boron source, the preparation steps of the inorganic porous ceramic material are as follows. The first step ingredients: Mg, Fe(OH) 3 、H 3 BO 3 All are analytical reagents, weighing 19.56g Mg, 28.51g Fe(OH) 3 , 16.54gH 3 BO 3 , wherein the molar ratio Mg:Fe:B is 1:0.33:0.33. The second step of mixing: the weighed Mg, Fe(OH) 3 and H 3 BO 3 Add a high-speed mixer (18000 rpm) and mix for 5 minutes to make it fully uniform. The third step of molding: Pour the mixture into a steel mold, use a 500-ton press, hold the pressure for 18 minutes, shape it, and take it out. The fourth step is reaction sintering: put the formed material into the reaction tank without sealing. Put the reaction tank into a heating furnace, keep it warm at 650°C for 20 minutes, cool naturally, open the tank and take out the product, the appearance is ...

Embodiment 2

[0032] According to the material ball milling and sintering process, Mg(OH) 2 , Mg is magnesium source, ferric nitrate is iron source, B 2 o 3 As the boron source, the preparation steps of the inorganic porous ceramic material are as follows. The first step ingredients: Mg(OH) 2 , Mg, Fe(NO3) 3 , B 2 o3 All are analytical reagents, weigh 15.31g Mg(OH) 2 , 38.31g Mg, 63.46g Fe(NO3) 3 , 36.55g B 2 o 3 , wherein the molar ratio Mg:Fe:B is 1:0.14:0.57. The second step of ball milling: Pour the prepared raw materials into the steel ball mill tank, adjust the parameters of the ball mill, rotate at 500 rpm, revolution at 250 rpm, and mill for 16 hours. The third step of molding: pour the ball mill material into a steel mold, and use a 500-ton press to hold the pressure for 18 minutes. The fourth step is reaction sintering: put the formed material into the reaction tank without sealing. Put the reaction tank into a heating furnace, keep it warm at 700°C for 15 minutes, cool...

Embodiment 3

[0034] According to the liquid phase composite and sintering process, MgCO 3 , Mg is magnesium source, FeCl 3 , iron boron (FeB 1.3 ), B 2 o 3 The preparation process of MgFeBO inorganic porous ceramic material is introduced for iron source and boron source. The first step ingredients: MgCO 3 , Mg, FeCl 3 , ferroboron powder, B 2 o 3 All are analytical reagents, weigh 8.06g MgCO 3 , 20.93g Mg, 15.51g FeCl 3 , 50g ferroboron powder, 20.01gB 2 o 3 , wherein the molar ratio Mg:Fe:B is 1:0.85:1.58. The second step of reaction coating: pour the weighed material into a 1000ml beaker, add 40g of concentrated ammonia water with a mass fraction of 25-28%, and stir for 5 hours. The third step is water removal and pulverization process: the mixed solution is suction filtered and washed. The filter cake was dried in a vacuum oven at 80°C for 6 hours, then taken out and pulverized. The fourth step of molding: Pour the mixture into a steel mold, and use a 500-ton press to keep...

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Abstract

The invention relates to an inorganic porous ceramic material and a preparation method thereof. The inorganic porous ceramic material is prepared from boron-containing compound, magnesium-containing compound and iron-containing compound, the molar ratio of the Mg element, the Fe element and the B element in the magnesium-containing compound, the iron-containing compound and the boron-containing compound is 1 : (0.10-1.65) : (0.33-1.95), and the inorganic porous ceramic material is obtained by mixing, compression moulding and sintering. The invention has the advantages that (1) the process is simple and the cost is low; (2) the inorganic porous ceramic material can be used as a catalyst carrier, and a gas-solid phase reaction filler and a boron source precursor and can also be used as an adsorbent; (3) when the heat of the inorganic porous ceramic material is preserved for 24 hours at the temperature of 800 DEG C, the maximum weight-loss ratio and the maximum weight gain ratio of the inorganic porous ceramic material are both smaller than 5wt.%, the compression strength is 1.02-2.50 MPa, and the volume density is 1.25-7.50g / cm3.

Description

technical field [0001] The invention relates to the field of preparation of ceramic materials, in particular to an inorganic porous ceramic material and a preparation method thereof. Background technique [0002] Gas-solid phase reaction is the reaction process of gas phase components under the action of solid catalyst, which is the most widely used and largest scale reaction process in the chemical industry. According to statistics, about 90% of the catalytic reaction process is gas-solid phase catalytic reaction process. The gas-solid phase catalytic reaction process generally includes the following steps: (1) The reaction gas diffuses to the inner surface of the solid catalyst particle through the micropores in the particle. (2) The reaction gas is adsorbed by the active center of the catalyst surface. (3) The gas-solid phase reaction is carried out on the surface active center. (4) The reaction product is desorbed from the surface active center. (5) The reaction prod...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/622
Inventor 谷云乐王吉林黄志良张芳徐军
Owner WUHAN INSTITUTE OF TECHNOLOGY
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