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A kind of preparation method of sodium titanate powder

A technology of powder and sodium hydride powder, applied in titanate, alkali metal titanate, chemical instruments and methods, etc., can solve problems such as high synthesis temperature and harsh process conditions, and achieve environmental friendliness and easy industrial implementation Effect

Active Publication Date: 2017-10-20
宇恒电池股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above preparation method requires very high synthesis temperature and harsh process conditions

Method used

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  • A kind of preparation method of sodium titanate powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The titanium dioxide powder was dried in a vacuum oven at 80 °C for 6 h. Under the protection of an argon atmosphere, 0.80 g of titanium dioxide powder and 0.24 g of sodium hydride powder were uniformly mixed and then added to a ball mill jar. Then put the balls into the ball mill jar and seal it. The ratio of the total mass of grinding balls to the total mass of materials is 60:1. Under room temperature conditions, the ball milling tank was continuously ball milled at a speed of 360r / min for 36 hours, and the obtained powder was NaTiO 2 Powder. figure 1 Its corresponding XRD diffraction pattern, compared with the standard card, it can be seen that the obtained product is pure phase NaTiO 2 , the product yield was 93%, and no other impurities existed.

Embodiment 2

[0024] The titanium dioxide powder was dried in a vacuum oven at 60 °C for 24 h. Under the protection of a nitrogen atmosphere, 1.60 g of titanium dioxide and 0.48 g of sodium hydride powder were evenly mixed and then added to a ball mill jar. Then put the balls into the ball mill jar and seal it. The ratio of the total mass of grinding balls to the total mass of materials is 40:1. Under room temperature conditions, the ball milling tank was continuously ball milled at a speed of 450r / min for 48 hours, and the obtained powder was NaTiO 2 Powder, the product yield is 94%.

Embodiment 3

[0026] Titanium dioxide was dried in a vacuum oven at 100 °C for 12 h. Under the protection of an argon atmosphere, 0.64g of titanium dioxide powder and 0.19g of sodium hydride powder were uniformly mixed and then added to a ball mill jar. Then put the balls into the ball mill jar and seal it. The ratio of the total mass of grinding balls to the total mass of materials is 20:1. Under room temperature conditions, the ball milling tank was continuously ball milled at a speed of 500r / min for 24 hours, and the obtained powder was NaTiO 2 Powder, the product yield is 93%.

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Abstract

The invention discloses a method for preparing sodium titanate powder. The method includes the following steps that (1) titanium dioxide powder is dried in a vacuum oven; (2) under protection of the inert atmosphere, the dried titanium dioxide and sodium hydride powder are mixed in the molar ratio of the titanium dioxide to the sodium hydride powder of (0.9-1.1):1, the mixture is added into a ball-milling tank, the ball-milling tank is sealed after grinding balls are added, and then the mixture is subjected to ball milling for 4 h to 48 h under the rotating speed of 200 r / min to 500 r / min at the room temperature; (3) ball milling is completed, under the inert atmosphere, powder is taken out of the ball-milling tank, and the sodium titanate powder is obtained. The method for preparing the sodium titanate powder has the advantages of being simple in technology, low in cost and easy to industrially produce.

Description

(1) Technical field [0001] The invention relates to a method for preparing sodium titanate (NaTiO 2 ) powder method. (2) Background technology [0002] NaTiO 2 It is a new type of anode material for sodium ion batteries with great application potential. Although the radius of sodium ions is larger than that of lithium ions, in TiO 2 It still has a certain solid-state diffusion ability. According to relevant literature reports, TiO 2 embedded in Na + form Na x TiO 2 , Na + The embedding amount is x=0 to 1.0. Currently, NaTiO 2 There is still little research on the preparation of TiO 2 And metal sodium as raw material, reduced at high temperature to generate NaTiO 2 , such as Ceder et al. anatase TiO 2 Put metal sodium in a stainless steel pipe filled with argon atmosphere, and reduce it at 920 ° C for 12 hours to prepare NaTiO 2 (Energy & Environmental Science, 2015, 8, 195-202). However, the above-mentioned preparation method requires very high synthesis tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00
CPCC01G23/005C01P2002/72
Inventor 张文魁方如意钟昊悦夏阳梁初黄辉陶新永甘永平张俊
Owner 宇恒电池股份有限公司