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Method for preparing titanium oxide crystal

A technology of trititanium pentoxide and titanium dioxide, which is applied in the field of preparation of trititanium pentoxide crystals, can solve problems such as differences in oxygen content, influence on coating efficiency, and influence on the purity and quality of the coating layer, and achieve shortening of pre-melting time, purity and Effects of improving quality and shortening coating time

Active Publication Date: 2014-05-21
FUJIAN ACETRON NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The granular trititanium pentoxide must be pre-melted before coating, which greatly affects the efficiency of coating and increases the production cost of coating
At the same time, in the prior art, the granular trititanium pentoxide is easy to introduce impurities during the preparation process, forming a large number of pores, and there are substances with relatively large differences in oxygen content, thereby affecting the purity and quality of the prepared coating layer

Method used

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  • Method for preparing titanium oxide crystal
  • Method for preparing titanium oxide crystal
  • Method for preparing titanium oxide crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see again figure 1 , the preparation method specifically includes the following steps:

[0030] Step 1: Mix titanium powder and titanium dioxide according to the mass ratio of titanium: titanium dioxide = 1:8.25; then put the mixed raw materials in the crucible 2 of the sintering mold 100, and use 400 N of pressure to flatten and compact; The particle size of the titanium powder is 10-12 μm, and the purity is above 99.9%; the particle size of the titanium dioxide is 3-5 μm, and the purity is above 99.99%.

[0031] Step 2: Place the sintering mold 100 in a vacuum sintering furnace, and evacuate until the vacuum degree in the furnace is 10 -1 below pa;

[0032] Step 3: Heating and sintering in stages, the parameter requirements of each stage are as follows:

[0033] A. Normal temperature -1200°C, heating rate is 6°C / min, vacuum degree is kept at 3.0×10 -2 pa;

[0034] At this stage, the heating rate is fast, the raw material titanium and titanium dioxide do not react...

Embodiment 2

[0045] This part differs from Example 1 in that:

[0046] Step 1: Use 800 N of pressure to tile and compact;

[0047] Step 3:

[0048] A. The heating rate is 7°C / min, and the vacuum degree is kept at 1.0×10 -2 pa;

[0049] B. The heating rate is 4°C / min, and the vacuum degree is kept at 2.0×10 -2 pa;

[0050] C. The heating rate is 2°C / min, and the vacuum degree is kept at 4.0×10 -2 pa;

[0051] D. The heating rate is 1.5°C / min, and the vacuum degree is 6.0×10 -2 pa;

[0052] E. Insulate at 1805°C for 5 hours;

[0053] Step 4: The vacuum sintering furnace is cooled to 1600° C. at a rate of 3° C. / min.

Embodiment 3

[0055] This part differs from Example 1 in that:

[0056] Step 1: Use 600 N of pressure to tile and compact;

[0057] Step 3:

[0058] A. The heating rate is 8°C / min, and the vacuum degree is kept at 2.0×10 -2 pa;

[0059] B. The heating rate is 5°C / min, and the vacuum degree is kept at 3.0×10 -2 pa;

[0060] C. The heating rate is 2.5°C / min, and the vacuum degree is kept at 5.0×10 -2 pa;

[0061] D. The heating rate is 2°C / min, and the vacuum degree is 7.0×10 -2 pa;

[0062] E. Insulate at 1805°C for 8 hours;

[0063] Step 4: The vacuum sintering furnace is cooled to 1600° C. at a rate of 2° C. / min.

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Abstract

The invention discloses a method for preparing titanium oxide crystal. The method comprises the following steps: evenly mixing titanium powder and titanium oxide in a sintering mold, spreading flat and compacting; putting in a vacuum sintering furnace and vacuumizing; sintering by stages; finally cooling to obtain the product, wherein a sintering curve is as follows: the heating rate is 6-8 DEG C / min between normal temperature to 1200 DEG C; the heating rate is 3-5 DEG C / min between 1200 DEG C and 1670 DEG C; the heating rate is 1.5-2.5 DEG C / min between 1670 DEG C and 1770 DEG C; the heating rate is 1-2 DEG C / min between 1770 DEG C and 1805 DEG C; cooling after keeping the temperature at 1805 DEG C for 4-8 hours. The flaky titanium oxide crystal can be prepared by the method; the premelting time can be shortened by the flaky Ti3O5 crystal, or even the premelting procedure can be omitted, the coating time can be greatly shortened, and by adopting the coating layer product prepared by the flaky Ti3O5 crystal, the purity and the quality are effectively improved.

Description

technical field [0001] The invention specifically relates to a preparation method of trititanium pentoxide crystal. Background technique [0002] Trititanium pentoxide crystal is widely used in the manufacture of optoelectronic components. It has been widely recognized in the industry because of its stable evaporation process. It has replaced titanium dioxide and has become the main application material in high refractive index film materials in the field of display technology. At present, the titanium pentoxide widely used in the industry is mainly granular crystals, and the conventional specifications are 1-3mm, 3-5mm, etc. However, granular trititanium pentoxide must be pre-melted before coating, which greatly affects the efficiency of coating and increases the production cost of coating. Meanwhile, in the prior art, the granular trititanium pentoxide is easy to introduce impurities during the preparation process, forming a large number of pores, and there are substances...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/16C30B28/06C23C14/24C23C14/08
Inventor 陈钦忠张喻
Owner FUJIAN ACETRON NEW MATERIALS CO LTD
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