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Method for producing complex metal oxide, metal oxide sintered body, and rotary kiln

A composite metal and oxide technology, which is applied in the field of rotary kiln, can solve the problems of low reactivity and high corrosion of alkali metal, and achieve the effects of high production efficiency, reduced production cost and improved durability

Active Publication Date: 2013-12-18
TOHO TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, firing parts such as alumina, magnesia, zirconia, mullite, and cordierite are used for firing, but alkali metals are highly corrosive, so it is necessary to select materials with low reactivity and high durability. Parts for firing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The preparation method of the composite metal oxide of the present invention is that when the composition containing alkali metal is fired to obtain the composite metal oxide, the composition is placed on the part which is in contact with the composition to be formed from the metal oxide component. Carry out firing on the support body, it is characterized in that, with respect to this metal oxide component 100 weight parts, the content of K atom in this metal oxide component is converted into K 2 O is 5 to 13 parts by weight, and the total content of Al atoms, Zr atoms, Mg atoms, and Ce atoms is 15 to 70 parts by weight in terms of oxides relative to 100 parts by weight of the metal oxide component.

[0028] Hereinafter, the composite metal oxide obtained according to the method for preparing the composite metal oxide of the present invention is referred to as "composite metal oxide A", and the composite metal oxide containing potassium is referred to as "potassium-conta...

Embodiment 1）

[0099]

[0100] 52.5kg of K 2O 6 (TiO 2 ) powder (TOFIX-SN manufactured by Toho Material Co., Ltd.) (average particle size: 6.5 μm), 21 kg of alumina (Al 2 o 3 , A-21 manufactured by Sumitomo Chemical Co., Ltd.), 735 g of a polycarboxylate ammonium salt-based dispersant (KE-511 manufactured by Huoying Chemical Industry Co., Ltd.), and 37 liters of water were mixed for 15 minutes. The mixed powder was subjected to spray granulation with a spray dryer (Okawara Chemical Equipment Co., Ltd. FOC20 type) to obtain a granulated powder d1. Conditions were hot air temperature 250° C., exhaust air temperature 100° C., and sprayer rotation speed 12000 rpm.

[0101] The obtained 200g granulated powder (d1) was mixed at 1000kg / cm 2 Under the surface pressure, it is formed into a size of 100mm square. Next, the obtained molded body was heated up at 50° C. / hour in air, sintered at 1350° C. for 2 hours, and then lowered at 50° C. / hour to obtain a metal oxide sintered body a1. In the m...

Embodiment 2）

[0103] In a glove box under an atmospheric atmosphere, weigh 291.25 g of titanium oxide powder with a purity of 99.9% (manufactured by Toho Titanium Co., Ltd., with a rutile rate of 90%) and 108.75 g of lithium carbonate powder with a purity of 99.0% (Wako Junyaku Kogyo Co., Ltd.), a raw material with a Li / Ti ratio of 0.80 was selected. The average particle diameters of the two selected powders are both 0.1-10 μm. Next, the selected titanium oxide powder and lithium carbonate powder were filled into a rock mixer and mixed for 2 hours to obtain firing raw material powder b1. 100 g of the obtained fired raw material powder b1 was divided and filled into a titanium metal mold with a diameter of 50 mm, and a plurality of molded bodies b1 of the fired raw material were prepared under a pressure of 0.5 ton / cm 2 . Next, the molded body b1 of the firing raw material was placed on the metal oxide sintered body a1, they were inserted into a heating furnace, the temperature was raised t...

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PUM

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Abstract

A method for producing a complex metal oxide, wherein a composition containing an alkali metal is disposed on a stage, a part of which that comes into contact with the composition is formed of a metal oxide component, and fired when a complex metal oxide is obtained by firing the composition. This method for producing a complex metal oxide is characterized in that the content of K atoms in the metal oxide component is 5-13 parts by weight in terms of K2O per 100 parts by weight of the metal oxide component and the total content of Al atoms, Zr atoms, Mg atoms and Ce atoms is 15-70 parts by weight in terms of oxides per 100 parts by weight of the metal oxide component. The present invention is able to provide a method for producing a complex metal oxide containing an alkali metal, said method being capable of reducing the production cost.

Description

technical field [0001] The invention relates to a preparation method of an alkali metal-containing composite metal oxide. In addition, the present invention also relates to a new metal oxide sintered body and a rotary kiln using the metal oxide sintered body. Background technique [0002] Alkali metal-containing mixed metal oxides are useful compounds, for example, lithium mixed metal oxides are used in electrodes of lithium ion secondary batteries, and potassium mixed metal oxides are used in friction materials. For example, lithium-cobalt composite oxide, lithium-nickel composite oxide, lithium-manganese composite oxide, lithium-manganese-cobalt composite oxide, lithium-nickel-cobalt composite oxide, etc. Lithium composite oxide or the like is used as the negative electrode active material. In addition, the K 2 O 6 (TiO 2 ), K 2 O 8 (TiO 2 ) etc. are used as friction materials. [0003] These alkali metal-containing composite metal oxides are prepared by putting raw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C01G23/00C01G25/02C04B35/46F27D1/00
CPCC01G23/005C01G25/006F27B7/20F27B7/28F27D1/0006C04B35/01C04B35/462C04B2235/3275C04B2235/96C04B35/50
Inventor 堀直通中岛干夫
Owner TOHO TITANIUM CO LTD
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