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Method for preparing titanium filter core material by using microwave sintering technology

A technology of microwave sintering and filter elements, which is applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of limited use and popularization, long sintering time, high cost, etc., and achieve reduced production costs, short sintering time, and rapid sintering Effect

Inactive Publication Date: 2014-08-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the traditional powder sintering method is used for titanium filter elements, and there are many defects inside the preparation material, and the performance needs to be further improved. Moreover, due to the long sintering time and generally requiring vacuum sintering, the cost is relatively high
These shortcomings make it limited in the use of promotion

Method used

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  • Method for preparing titanium filter core material by using microwave sintering technology
  • Method for preparing titanium filter core material by using microwave sintering technology
  • Method for preparing titanium filter core material by using microwave sintering technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The analytical balance weighed titanium powder with a particle size of 350 mesh, and added 20vol% ammonium bicarbonate pore-forming agent. Put the weighed powder into a bottle and seal it, and put it into a mixer for powder mixing. The mixing time is 7 hours to obtain a uniformly mixed original powder. The uniformly mixed powder is pressed into shape with a pressure of 350 MPa. Put the compact into a micro furnace with a microwave frequency of 2450MHz, an output power of 1KW, and a sintering time of 15 minutes; after the sintering is completed, it is cooled to room temperature with the furnace, and the porous titanium filter element material is obtained by taking it out. Such as figure 1 Shown is a photomicrograph of the titanium filter element material. The results of energy spectrum analysis are as figure 2 As shown, it can be seen that the main component element of the filter material is titanium, and there is no obvious oxidation phenomenon.

Embodiment 2

[0022] The analytical balance weighed titanium powder with a particle size of 300 mesh, and added 20vol% ammonium bicarbonate pore-forming agent. Put the weighed powder into a bottle and seal it, and put it into a mixer for powder mixing. The mixing time is 6 hours to obtain a uniformly mixed original powder. The uniformly mixed powder is pressed into shape with a pressure of 400 MPa. Put the compact into a micro furnace with a microwave frequency of 2450MHz, an output power of 1KW, and a sintering time of 5 minutes; after the sintering is completed, it is cooled to room temperature with the furnace and taken out to obtain the required porous titanium filter element material.

Embodiment 3

[0024] The analytical balance weighed titanium powder with a particle size of 400 mesh, and added 20vol% ammonium bicarbonate pore-forming agent. Put the weighed powder into a bottle and seal it, and put it into a mixer for powder mixing. The mixing time is 8 hours to obtain a uniformly mixed original powder. The uniformly mixed powder is pressed into shape with a pressure of 300 MPa. Put the compact into a micro furnace with a microwave frequency of 2450MHz, an output power of 0.5KW, and a sintering time of 25 minutes; after the sintering is completed, it is cooled to room temperature with the furnace and taken out to obtain the required porous titanium filter element material.

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Abstract

The invention discloses a method for preparing a titanium filter core material by using a microwave sintering technology. The pore diameter of the prepared porous titanium material is controllable at a nano scale and a micron scale, and the porosity can reach up to 60 percent. After micron scale titanium powder is proportionally mixed with a pore forming agent, mixed powder material is pressed to be formed and then put into a microwave sintering furnace to be sintered by microwaves. The method has the advantages of low sintering temperature, short sintering time, no need of vacuum environment, high energy utilization rate, high heating efficiency, good performance of sintered products, sanitation of a rough sintering method and no pollution; and on the premise that the quality is guaranteed, the production time is shortened, the implementation cost is low, the operation is simple and the production cost is reduced, so that the method for preparing the porous material saves energy, is efficient and can bring great economic benefits and social benefits.

Description

technical field [0001] The invention relates to a method for preparing a porous titanium filter core material, in particular to a microwave sintering method which is more optimized than the traditional powder electric furnace sintering process. Background technique [0002] Sintered metal filter material is a filter material with superior performance produced by powder metallurgy, which is used to purify gas or liquid containing solid impurities. The titanium filter element is a titanium high-efficiency porous filter material made of titanium powder by powder metallurgy. Its internal pores are curved and criss-crossed, and the pore size distribution is uniform. The filtration mechanism is a typical deep filtration. Titanium filter element can be adjusted in a wide range because of its porosity and filtration precision, and has excellent performances such as low filtration resistance, corrosion resistance, high temperature resistance, high strength, easy assurance of filtrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C1/04B22F3/11B01D39/20
Inventor 魏强平瑞婷王伟莉刘爱峰马剑雄
Owner TIANJIN UNIV