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Titanium oxide particle and its production method

A manufacturing method and technology of titanium oxide, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of dielectric property decline, quality deviation, and agglomeration, and achieve the effect of excellent uniformity and dispersion

Active Publication Date: 2016-05-04
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the melted flux tends to be localized, and the localized part aggregates more, causing quality deviation with other parts.
If the particles agglomerate then BaTiO 3 The crystal growth of particles becomes abnormal particles, which will make BaTiO 3 The dielectric properties of the

Method used

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  • Titanium oxide particle and its production method
  • Titanium oxide particle and its production method
  • Titanium oxide particle and its production method

Examples

Experimental program
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Effect test

Embodiment 1

[0137]

[0138] 8.3Nm 3 / hour (N means the standard state. The following is the same.) gaseous titanium tetrachloride (the purity of titanium tetrachloride ≥ 99.99% by mass) with 0.5Nm 3 Titanium tetrachloride dilution gas (gas G1) obtained by diluting nitrogen gas per hour, and at 0.5Nm 3 / hour of oxygen and 36Nm 3 / hour of steam mixed in 18Nm 3 The oxidizing gas (gas G2) obtained by the inert gas per hour was introduced into a reactor made of quartz glass. After cooling air was introduced into the reaction tube so that the high temperature residence time of 900° C. or higher and lower than 1200° C. became 0.02 seconds, coarse titanium oxide particles were collected with a polytetrafluoroethylene bag filter. The amount of each gas used is shown in Table 1.

[0139]

[0140] The obtained coarse titanium oxide particles are passed through a cylindrical rotary heating furnace, and the mass ratio of water vapor to crude titanium oxide (mass of water vapor / mass of coarse ...

Embodiment 2～7、 comparative example 1～2

[0142] The first step was implemented in the same manner as in Example 1, except that the amount of gas in the first step and the high-temperature residence time were as shown in Table 1 or Table 2.

[0143] Next, except having set the mass ratio of the water and rough titanium oxide and heating temperature as shown in Table 1 or Table 2 in the 2nd process, it carried out similarly to Example 1, and implemented the 2nd process. The measurement results are shown in Table 3 or Table 4.

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Abstract

The present invention provides a preparation method of titanium oxide partcles being less in the total content a of chloride and being good in uniformity and dispersibility. The preparation method of the titanium oxide particles includes: feeding a gas G1 containing titanium tetrachloride and an inert gas, and a gas G2 containing at least one of oxygen and steam and an inert gas into a reaction tube and performing a reaction to complete a first step for preparing the titanium oxide partcles; perfomring a dry dechlorination method to the crude titanium oxide for dechlorination, wherein the total amount of the first reaction step of introducing an inert gas pipe (gas G1 with the inert gas in the gas G2 the total amount), with respect to 1 mol of titanium tetrachloride is 1 mol or more and 50 mol or less, the gas G2 in the amount of inert gas, relative to 1 mol of gas G1 in the inert gas is less than 5 mol.

Description

technical field [0001] The present invention relates to titanium oxide particles and its production method, as well as slurry, dispersion, composition and dielectric material containing titanium oxide particles. Background technique [0002] Titanium oxide has a wide range of industrial applications, represented by cosmetics, ultraviolet shielding materials, and additives to silicone rubber. In recent years, it has been involved in various applications such as photocatalysts, solar cells, dielectric materials, and electrode materials for Li-ion batteries. In addition, "titanium oxide" is described as titanium dioxide in Japanese Industrial Standards (JIS), but since titanium oxide is widely used as a general name, it is abbreviated as titanium oxide in this specification. [0003] Recently, especially as a high-performance dielectric material, such as BaTiO 3 As a raw material, titanium oxide has attracted attention. BaTiO 3 Obtained by the following reaction under heatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047
CPCC01G23/07C01P2006/12
Inventor 鹿山进植吉义范古本祥康
Owner RESONAC CORPORATION