Nanoscale barium titanate powder and preparation process thereof

A barium titanate powder and preparation technology, which is applied in the direction of titanate, nanotechnology, nanotechnology, etc., can solve the problems of difficult preparation of particle size, narrow particle size range, and low tetragonal ratio value, so as to promote dispersion and Effects of rheological properties, concentrated particle size distribution range, and narrow particle size distribution range

Active Publication Date: 2022-03-01
GUANGDONG KANGRONG HIGH TECH NEW MATERIAL CO LTD
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Problems solved by technology

[0004] In view of the problems raised by the background technology, the purpose of the present invention is to propose a preparation process for nano-scale barium titanate powder. The nano-scale barium titanate powder prepared by this preparation process has high square ratio, small particle size and The advantage of narrow particle size range solves the problem that it is difficult to prepare barium titanate powder with small particle size and high tetragonal ratio value by using solid-state method
[0005] Another object of the present invention is to propose a nano-scale barium titanate powder, which has the advantages of high square ratio, small particle size and narrow particle size range, and solves the problem that the existing nano-scale barium titanate powder has a large particle size and The problem of low quadrilateral ratio

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  • Nanoscale barium titanate powder and preparation process thereof

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[0022] Preparation process of nanoscale titanate powder, including the following steps:

[0023] (1) According to the number of mass parts, 280 to 320 parts of deionized water, 20 to 30 parts of the monohydric alcohol and 78.85 to 80.85 parts of titanium dioxide were mixed, and the pH of the mixture was 5 to 6, After the mixture was heated to 45 to 60 ° C, 0.5 to 1.5 parts of the chelating titanate coupling agent was added to the mixed material, and then cooled to normal temperature after stirring for 6 to 9 h, and the modified titanium dioxide material was obtained.

[0024] (2) Take 195.34 to 199 to 199.

[0025] (3) After spraying the ball grinding, calcination is calcined at 1020 to 1080 ° C for 4 to 8 h, and the nano-grade titanate powder is obtained.

[0026] The preparation of a barium titanate powder is currently generally used in solid phase method, but the particle size of the barium titanate powder prepared by solid phase method is large, the particle size is widely dis...

Embodiment 1

[0052] Preparation process of nanoscale titanate powder, including the following steps:

[0053] (1) Titanium dioxide and barium carbonate were held at 500 ° C for 2 h, and the impurities were removed, wherein the medium value of titanium dioxide was 100 nm, the median particle diameter of barium carbonate was 50 nm.

[0054] According to the mass fraction, 300 parts of deionized water, 25 parts of a monohydric oxide mixed with a mixture was mixed, and an oxalic acid solution was added to the mixed material, and the pH of the mixture was 5.5, and the mixture was heated to the mixture. After 50 ° C, 1 part of the chelating titanate coupling agent was added to the mixed material, and then cooled to normal temperature after stirring for 8 h, to obtain a modified titanium dioxide material; wherein the chelate titanate coupling agent was from 0.5 parts. Twis (sterosphoate) titanate titanate ester and 0.5 parts of di (acetylacetonate) diisopropoxylate; the monopropyl alcohol is selected...

Embodiment 2

[0058] The preparation process of nano-stage titanate powder is substantially identical, and the sample is 1.5 parts of the quality parts of the chelate titanate coupling agent used in the present embodiment. The titanate coupling agent consists of 0.75 parts of di-phosphate octyl (phosphate) titanate or 0.75 parts of di (acetylacetone) diisopropoxide titanate, according to the present embodiment. The preparation process was prepared to obtain nano-grade titanate powder.

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Abstract

The invention discloses nanoscale barium titanate powder and a preparation process thereof, and relates to the technical field of inorganic powder synthesis, and the preparation process of the nanoscale barium titanate powder comprises the following steps: uniformly mixing 280-320 parts by mass of deionized water, 20-30 parts by mass of monohydric alcohol and 78.85-80.85 parts by mass of titanium dioxide to obtain a mixed material, and keeping the pH value of the mixed material at 5-6, heating the mixed material to 45-60 DEG C, adding 0.5-1.5 parts of a chelating titanate coupling agent into the mixed material, carrying out heat preservation stirring for 6-9 h, and cooling to normal temperature to obtain a modified titanium dioxide material; 195.34-199.34 parts of barium carbonate and 0.1-0.3 part of a defoaming agent are taken and added into the modified titanium dioxide material, ball milling is conducted for 4-5 h, and ball-milled slurry is obtained; and carrying out spray drying on the ball-milled slurry, and calcining to obtain the nano-scale barium titanate powder. The nanoscale barium titanate powder prepared by the preparation process has the advantages of high tetragonal phase ratio value, small particle size and narrow particle size range.

Description

Technical field [0001] The present invention relates to the field of inorganic powder synthesis, and more particularly to a nanometer titanate powder and a preparation process thereof. Background technique [0002] Barium titanate (Batio 3 ) Is bao-Tio 2 The classic ferroelectric compound in the system has good dielectric and ferroelectric properties, which is the basic base material of electronic ceramic elements, which is widely used in mini-capacitors and temperature compensation components that have small volume, large capacity, and is also used to make nonlinearity. Components, media amplifiers, electronic computer memory components, ceramic sensitive components, microwave ceramics and piezoelectric ceramics, etc. As the thickness of these components is constantly decreasing, the requirements for the performance requirements are increasing, and the requirements of barium titanate are also more demanding. Specifically, the particle size, particle size distribution, and four-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B82Y30/00B82Y40/00
CPCC01G23/006B82Y40/00C01P2004/64C01P2006/12C01P2002/30
Inventor 林小冬谢义鹏薛伟志符仁敏
Owner GUANGDONG KANGRONG HIGH TECH NEW MATERIAL CO LTD
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