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Preparation method of light-induced phase transition storage powdery material lamda-Ti3O5

A powder material, photoinduced phase change technology, applied in the direction of titanium oxide/hydroxide, etc., can solve the problems of high cost, unsafe, complicated operation, etc., and achieve the effect of low cost, high production efficiency and simple process

Active Publication Date: 2015-10-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost, complicated operation, and great insecurity of hydrogen reduction, it is necessary to find a safer, reliable, and low-cost method to realize λ-Ti 3 o 5 Powder preparation

Method used

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  • Preparation method of light-induced phase transition storage powdery material lamda-Ti3O5
  • Preparation method of light-induced phase transition storage powdery material lamda-Ti3O5
  • Preparation method of light-induced phase transition storage powdery material lamda-Ti3O5

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. According to Ti 3 o 5 The chemical reaction between the powder and the raw materials used is to measure each raw material, and the weight percentage of each raw material is as follows:

[0025] Pure rutile nano-TiO 2 Powder (30-50nm particle size) is 95.5wt%, carbon black powder is 4.5wt%; nano-TiO in the above raw materials 2 The powder has been surface-treated with 3.0wt% zirconate coupling agent;

[0026] 2. Put the raw materials measured in step 1 into the container, use analytical pure alcohol as the mixing medium, and ultrasonically disperse the raw materials to mix them evenly. Drying at high temperature for 6 hours to obtain mixed powder; place the dried powder in a mortar and grind to make it further mixed evenly;

[0027] 3. Weigh the powder obtained in step 2 in stages, weigh 2.0g each time, put it in the mold, slowly apply pressure to 12Mpa, and let it stand for 5min when the predetermined pressure is reached, then demould and sample, and obtain ...

Embodiment 2

[0030] 1. According to Ti 3 o 5 The chemical reaction between the powder and the raw materials used is to measure each raw material, and the weight percentage of each raw material is as follows:

[0031] Nano-TiO 2 Powder (particle size 20-30nm, TiO 2 The phase composition is 90wt% rutile type and 10wt% anatase type) is 95wt%, graphite powder is 5wt%;

[0032] Nano-TiO in the above raw materials 2 The powder has been surface-treated with 5.0wt% aluminate coupling agent;

[0033] 2. Put the raw materials measured in step 1 into a container, use industrial alcohol as the mixing medium, stir and disperse the raw materials to mix evenly, pour out the supernatant after centrifugation, and place the mixed slurry obtained by centrifugation in an oven at 100°C Dry for 3 hours to obtain mixed powder; grind the dried powder to make it further mixed evenly;

[0034] 3. Weigh the powder obtained in step 2 in stages, weigh 1.0g each time, put it in the mold, slowly apply pressure to ...

Embodiment 3

[0037] 1. According to Ti 3 o 5 The chemical reaction between the powder and the raw materials used is to measure each raw material, and the weight percentage of each raw material is as follows:

[0038] Pure anatase nano-TiO 2 Powder (particle size 10-20nm) is 94.0wt%, activated carbon powder is 6.0wt%;

[0039] Nano-TiO in the above raw materials 2 The powder has been surface treated with 3.0wt% aluminate coupling agent and 2.0wt% zirconate coupling agent;

[0040] 2. Put the raw materials measured in step 1 into a container, use acetone as the mixing medium, and ultrasonically disperse the raw materials to mix them evenly. After centrifuging, pour out the supernatant, and put the mixed slurry obtained by centrifugation in an oven to dry at 50°C. The mixed powder was obtained in 12 hours; the dried powder was ground to further mix it evenly;

[0041] 3. Weigh the powder obtained in step 2 in stages, weigh 2.5g each time, place it in the mold, slowly apply pressure to 8M...

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Abstract

The invention relates to a preparation method of a light-induced phase transition storage powdery material lamda-Ti3O5. The powder has a property of laser-induced solid-solid phase transition with changes of physical properties such as material electrical conductivity, and thus can be applied in high-density data storage. According to the preparation method, nano-grade TiO2 powder pretreated with an aluminate or zirconate coupling agent and with a particle size below 100nm is adopted as a raw material. The powder is well dispersed with a carbonaceous reducing agent in a mixed medium, and the mixture is dried, such that mixed powder is obtained. The mixed powder is compressed into a block. High-temperature reduction is carried out for 0.5-6h in a nitrogen or argon atmosphere and under a temperature of 900-1250 DEG C, and the obtained product is cooled to the room temperature. With the method, high-purity lamda-Ti3O5 powder can be prepared conveniently, safely and controllably with a low cost.

Description

technical field [0001] The invention relates to the technical field of preparation of photoinduced phase change storage materials, in particular to a novel laser-induced solid-solid phase change information storage functional material λ-phase titanium pentoxide powder (λ-Ti 3 o 5 ) method of preparation. [0002] The prepared λ-Ti 3 o 5 Photoinduced phase change materials have the ability to be excited by laser light at room temperature to induce reversible phase transitions. During the phase transition process, the electrical conductivity, magnetic permeability and other physical properties and material colors change greatly, so they can be used for high Density information storage. It belongs to the field of preparation of functional inorganic materials. Background technique [0003] In phase-change memory materials, metal alloys or chalcogenides are mostly used at present. Among them, the germanium-antimony-tellurium alloy series is mostly used in the metal alloy, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/04
Inventor 黄婉霞柴国庆施奇武魏丹刘刚
Owner SICHUAN UNIV
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