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Method for preparing porous titanium with titanium sesquioxide

A technology of dititanium trioxide and porous titanium, which is applied in the field of porous titanium preparation, can solve the problems of low connection strength and difficult block formation

Active Publication Date: 2019-05-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for preparing porous titanium at home and abroad basically use titanium powder as raw material, among which the titanium powder sintering method is the most researched and mature method for preparing porous titanium. The pore characteristics such as different porosity and different pore diameters are realized through placeholders. However, the currently prepared porous titanium is difficult to form a block due to the low connection strength between titanium particles.

Method used

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  • Method for preparing porous titanium with titanium sesquioxide
  • Method for preparing porous titanium with titanium sesquioxide
  • Method for preparing porous titanium with titanium sesquioxide

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Experimental program
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Embodiment 1

[0026] Embodiment 1: a kind of method that prepares porous titanium by dititanium trioxide, concrete steps are as follows:

[0027] (1) Mix titanium dioxide powder and calcium chloride evenly to obtain Ti 2 o 3 / CaCl 2 Mixed powder; wherein the mass ratio of titanium dioxide powder and calcium chloride is 6:1;

[0028] (2) The Ti in step (1) 2 o 3 / CaCl 2 The mixed powder is press-molded to obtain a preform; wherein the thickness of the preform is 5mm; wherein the pressure of the compression molding is 4Mpa, the diameter of the preform is 10mm, and the shape of the preform is a cylindrical block;

[0029] (3) Put the preform in step (2) into a vacuum and sinter at 850°C for 30 minutes to obtain a porous precursor; the degree of vacuum is 15Pa;

[0030] (4) Under the conditions of a pressure of 9 Pa and a temperature of 1000°C, the porous precursor of step (3) was reduced with calcium vapor for 6 hours;

[0031] (5) Dilute the reduction product of step (4) with dilute hy...

Embodiment 2

[0035] Embodiment 2: a kind of method for preparing porous titanium by dititanium trioxide, concrete steps are as follows:

[0036] (1) Mix titanium dioxide powder and calcium chloride evenly to obtain Ti 2 o 3 / CaCl 2 Mixed powder; wherein the mass ratio of titanium dioxide powder and calcium chloride is 4:1;

[0037] (2) The Ti in step (1) 2 o 3 / CaCl 2 The mixed powder is press-molded to obtain a preform; wherein the thickness of the preform is 8mm; wherein the pressure of the compression molding is 2Mpa, the diameter of the preform is 10mm, and the shape of the preform is a cylindrical block;

[0038] (3) Sintering the preform in step (2) in an argon atmosphere at a temperature of 900°C for 60 minutes to obtain a porous precursor;

[0039] (4) At a pressure of 10 -1 Pa and the temperature are 1000°C, using calcium vapor to reduce the porous precursor in step (3) for 6h;

[0040] (5) Dilute the reduction product of step (4) with dilute hydrochloric acid solution for...

Embodiment 3

[0044] Embodiment 3: a kind of method that prepares porous titanium by dititanium trioxide, concrete steps are as follows:

[0045] (1) Mix titanium dioxide powder and calcium chloride evenly to obtain Ti 2 o 3 / CaCl 2 Mixed powder; wherein the mass ratio of titanium dioxide powder and calcium chloride is 5:1;

[0046] (2) The Ti in step (1) 2 o 3 / CaCl 2 The mixed powder is press-molded to obtain a preform; wherein the thickness of the preform is 6mm; wherein the pressure of the compression molding is 4Mpa, the diameter of the preform is 15mm, and the shape of the preform is a cylindrical block;

[0047] (3) Sintering the preform in step (2) in an argon atmosphere at a temperature of 1000°C for 120 minutes to obtain a porous precursor;

[0048] (4) Under the conditions of a pressure of 5 Pa and a temperature of 900°C, the porous precursor of step (3) was reduced with calcium vapor for 12 hours;

[0049] (5) Dilute the reduction product of step (4) with dilute hydrochlo...

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Abstract

The invention relates to a method for preparing porous titanium with titanium sesquioxide and belongs to the technical field of porous titanium preparation. According to the method, titanium sesquioxide powder and calcium chloride are mixed evenly to obtain Ti2O3 / CaCl2 mixed powder; the Ti2O3 / CaCl2 mixed powder is subjected to pressing formation to obtain a preformed body; the preformed body is put in a vacuum or argon atmosphere to be sintered for 30-120 min under the condition of the temperature of 850-1000 DEG C, and a porous precursor is obtained; under the conditions that pressure intensity is 10<-1>-10 Pa and temperature is 900-1200 DEG C, and calcium vapor is adopted for reducing the porous precursor for 4-12 h; dilute hydrochloric acid solution is adopted for immersing reduction products for 30-240 min, and solid-liquid separation is conducted to obtain a solid A and pickle liquor; deionized water and absolute ethyl alcohol are used for alternately washing the solid A, and thenvacuum drying is conducted to obtain sheet porous titanium; and the sheet porous titanium is put at the temperature of 1200-1400 DEG C, vacuum sintering is conducted for 2-4 h, and the porous titanium is obtained. The porous titanium prepared by the method has two pore diameter distributions which are large pores of the pore diameter of 50-200 [mu]m and micropores of the pore diameter of 4-15 [mu]m correspondingly.

Description

technical field [0001] The invention relates to a method for preparing porous titanium from dititanium trioxide, belonging to the technical field of porous titanium preparation. Background technique [0002] In addition to the general metal properties, porous metal materials show excellent performance in the fields of equipment weight reduction, energy absorption and shock absorption, chemical catalysis, heat insulation and heat exchange, and noise reduction and noise reduction due to the large number of voids. Porous metal titanium is a composite material of metal titanium and gas. It not only has the characteristics of ordinary porous metals, but also has excellent properties such as good biocompatibility, high specific strength, adjustable elastic modulus and good corrosion resistance. Therefore, it is environmentally friendly, It has great application prospects in aerospace, nuclear industry, biomedicine and chemical catalysis. Especially in the field of biomedicine, th...

Claims

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Application Information

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IPC IPC(8): B22F3/11
Inventor 徐宝强杨国波王志军杨斌刘大春杨佳熊恒戴永年王飞田阳李一夫蒋文龙郁青春邓勇孔令鑫
Owner KUNMING UNIV OF SCI & TECH
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