NiAl-TiB2-TiC-Al2O3 porous membrane and its synthetic method with plasma heating reaction

A technology of nial-tib2-tic-al2o3 and a synthesis method, which is applied in the field of porous materials and their preparation, can solve the problems of high thin-sheet porous membrane structure, difficult strength, unfavorable preparation of catalyst coatings, etc. The effect of low cost and simple process

Active Publication Date: 2011-11-23
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for catalyst supports, the monolithic macrostructure and regular microscopic pore structure of existing Ni-Al intermetallic compound porous materials are not conducive to the preparation of catalyst coatings, and the controllability of the synthesis process is poor.
[0005] The above invention patents have the following disadvantages: (1) whether it is pure NiAl intermetallic compound porous material or TiB 2 -TiC-Al 2 o 3 Composite ceramic materials are difficult to meet the comprehensive performance requirements such as high temperature resistance, thermal conductivity and thermal shock resistance of the carrier of the automobile exhaust gas purifier; (2) the structure of the porous material is integral, and it is difficult to make a high-strength sheet (3) high-energy plasma beam as heat source, it is difficult to obtain a porous film separated from the substrate

Method used

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  • NiAl-TiB2-TiC-Al2O3 porous membrane and its synthetic method with plasma heating reaction
  • NiAl-TiB2-TiC-Al2O3 porous membrane and its synthetic method with plasma heating reaction

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The NiAl-TiB of this embodiment 2 -TiC-Al 2 o 3 Porous membranes were prepared by the following methods:

[0042] Step 1: Powder Preparation

[0043] Take commercially available titanium (Ti) powder, boron carbide (B 4 C) powder, boron trioxide (B 2 o 3 ) powder, nickel (Ni) powder and aluminum (Al) powder, requiring boron carbide (B 4 C), boron trioxide (B 2 o 3 ) and nickel (Ni) powder particle size is 200 mesh, titanium (Ti) powder and aluminum (Al) powder particle size is 100 mesh;

[0044] Step 2: Reaction Material Configuration and Mixing

[0045] The above Ni powder, Al powder, Ti powder, B 4 C and B 2 o 3 powder, according to the molar ratio Ni:Al:Ti:B 4 C:B 2 o 3 = 1: 3: 4: 1: 1, and use a three-dimensional mixer to dry mix for 6 to 8 hours to obtain a uniformly mixed powder;

[0046] The third step: billet

[0047] Put the uniformly mixed powder into a steel mold and cold-press it into a round compact with a size of 50×50×3mm and a compaction ...

Embodiment 2

[0057] The difference from Example 1 is that the gas volume of the plasma beam is 0.5m 3 / h, current 55A, scanning speed 8mm / s The main process parameters and related performance of the sample are shown in Table 2.

[0058] Table 2

[0059] Compact thickness (mm)

Embodiment 3

[0061] The difference from Example 2 is that the gas volume of the plasma beam is 0.6m 3 / h, current 60A, scanning speed 10mm / s The main process parameters and related performance of the sample are shown in Table 3.

[0062] table 3

[0063] Compact thickness (mm)

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Abstract

The invention discloses an NiAl-TiB2-TiC-Al2O3 porous membrane and a method for synthesizing the porous membrane with a plasma heating reaction. The method is that a composite material porous membrane is obtained through treating a plasma beam as a heat source, Ni powder, Al powder, Ti powder, B4C powder and B2O3 powder as raw materials, and argon as a plasma generation gas and a protective gas, and carrying out a reaction on the raw materials of powders under the effects of heating by a plasma beam flow and protecting by argon. The composite porous material integrates performance advantages of an Ni-Al intermetallic compound material and ceramic materials of TiB2, TiC, and Al2O3, and allows applications of the materials in aspects of catalysis, filtration, separation and the like to be enlarged.

Description

technical field [0001] The present invention relates to a kind of porous material and its preparation technology, especially a kind of NiAl-TiB 2 -TiC-Al 2 o 3 A composite porous membrane material and a preparation method thereof belong to the field of material synthesis and processing. Background technique [0002] With the increasingly stringent automobile exhaust purification regulations around the world, the requirements for exhaust purification technology are getting higher and higher. Whether the existing catalyst carrier materials for automobile exhaust purification are simple heat-resistant alloys, cordierite, or SiC ceramic materials, it is difficult to meet the high temperature resistance and wear resistance of the carrier, and the existing carrier has a monolithic macroscopic structure and a microscopic pore shape. The structure is mainly fine-pore honeycomb or wall-flow type, both of which have outstanding problems, such as clogging of pores when impregnating ...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/10C04B35/58C04B35/622
Inventor 崔洪芝曹丽丽吴杰谷征征王晓东
Owner SHANDONG UNIV OF SCI & TECH
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