A titanium nitride coated ti 2 o 3 compound al 2 o 3 Materials and their preparation methods

A titanium nitride and coating technology is applied in the titanium nitride-coated Ti2O3 composite Al2O3 material and its preparation, and in the field of preparation of titanium nitride-coated materials, which can solve the problems of high synthetic economic cost and high price, and achieve nitrogen The chemical method is simple and easy to implement, has a wide range of applications, and has the effect of high density.

Active Publication Date: 2022-04-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the synthetic economic cost of titanium nitride is high and expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: to containing Fe 2 o 3 Titanium concentrate with a mass percentage of 10% is smelted to obtain ferro-titanium alloy, and slag is obtained after liquid-solid separation; the slag is electrofused in an electric furnace at a temperature of 2300°C to obtain Ti 2 o 3 -Al 2 o 3 Department of raw materials. The raw materials were crushed into 3-5mm particles, placed in a corundum crucible, and nitrided by flowing nitrogen in a tube furnace. The nitriding temperature was 1400°C, the heating rate was 5°C / min, the temperature was kept for 3h, and the nitrogen flow rate was 40ml / min. A golden-yellow titanium nitride-coated Ti 2 o 3 Composite Al 2 o 3 Material.

[0028] The material consists of Al 2 o 3 ,TiO 2 , MgO, Fe 2 o 3 , CaO, SiO 2 , Na 2 Composition of O, of which: Al 2 o 3 The content is 80.03%; TiO 2 The content of MgO is 15.20%; the content of MgO is 1.36%; Fe 2 o 3 The content of CaO is 1.52%; the content of CaO is 0.51%; SiO 2 The co...

Embodiment 2

[0029] Embodiment 2: the difference between production technology and embodiment 1 is:

[0030] Ti 2 o 3 -Al 2 o 3 The raw materials are crushed into small particles of 0-1mm, and the nitriding temperature is 1300°C.

[0031] The material consists of Al 2 o 3 ,TiO 2 , MgO, Fe 2 o 3 , CaO, SiO 2 , Na2 Composition of O, of which: Al 2 o 3 The content is 84.27%; TiO 2 The content of Fe is 11.31%; Fe 2 o 3 The content of MgO is 1.06%; the content of MgO is 1.45%; the content of CaO is 0.89%; SiO 2 The content is 0.43%; Na 2 The content of O is 0.21%. The bulk density is 4.1g / cm 3 .

Embodiment 3

[0032] Embodiment 3: the difference between production technology and embodiment 1 is:

[0033] For Fe 2 o 3 The rutile concentrate with a mass percentage of 10% is smelted to obtain ferro-titanium alloy, slag is obtained after liquid-solid separation, and slag slices are nitrided.

[0034] The material consists of Al 2 o 3 ,TiO 2 , MgO, Fe 2 o 3 , CaO, SiO 2 , Na 2 Composition of O, of which: Al 2 o 3 The content is 75.62%; TiO 2 The content of MgO is 19.30%; the content of MgO is 0.99%; Fe 2 o 3 The content of CaO is 2.42%; the content of CaO is 0.48%; SiO 2 The content is 0.31%; Na 2 The content of O is 0.34%. The bulk density is 3.8g / cm 3 .

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Abstract

This product involves a titanium nitride coated Ti 2 o 3 Composite Al 2 o 3 A material and a preparation method thereof belong to the field of materials. The product is a titanium nitride-coated composite material obtained through the reduction of titanium concentrate by metal aluminum nitride. The material is made of Al 2 o 3 ,TiO 2 , MgO, Fe 2 o 3 , CaO, SiO 2 , Na 2 Composition of O, of which: Al 2 o 3 content of 70‑90%; TiO 2 The content of MgO is 5‑25%; the content of MgO is 0‑15%; Fe 2 o 3 The content of CaO is 0‑15%; the content of CaO is 0‑3%; SiO 2 The content of 0‑2%; Na 2 The content of O is 0-2%. The main phase of the product before nitriding is Ti 2 o 3 and Al 2 o 3 , after nitriding, a coating layer mainly composed of titanium nitride is formed on the surface, which is golden yellow, and the internal phase is Ti 2 o 3 and Al 2 o 3 , in black. Bulk density at 3.5‑5g / cm 3 between. The product realizes the efficient utilization of slag, and obtains a composite material with high performance and high application value. At the same time, it has environmental protection significance and economic value.

Description

technical field [0001] The invention relates to a preparation method of a titanium nitride coating material, in particular to a titanium nitride coating Ti 2 o 3 Composite Al 2 o 3 A material and a preparation method thereof belong to the field of materials. Background technique [0002] Titanium nitride has a high melting point (2950°C), high hardness, and does not react with iron, chromium, calcium and other metals at high temperatures. In CO and N 2 It is not corroded by acid slag and alkaline slag in the atmosphere, and has high electrical conductivity and wear resistance. Widely used in metal ceramics, surface treatment, composite materials and other fields. The preparation method of titanium nitride mainly includes TiO 2 Reductive nitriding method, mechanical ball milling method, high temperature self-propagating method, microwave synthesis method, etc. The most economical and commonly used is TiO 2 Reductive nitriding method, but requires high powder particle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/076C01F7/027C01G23/04
CPCC01B21/076C01G23/043C01F7/02C01P2004/80C01P2006/10
Inventor 李勇郑清瑶李和祯马晨红孙加林
Owner UNIV OF SCI & TECH BEIJING
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