Unlock instant, AI-driven research and patent intelligence for your innovation.

Nano barium titanate powder and preparation method thereof, ceramic dielectric layer and preparation method thereof

A barium titanate powder and nano-titanium dioxide technology, which is applied in the direction of titanate, alkaline earth metal titanate, etc., can solve the problems of barium titanate powder uniformity, uneven temperature control, and large volume of dispersion liquid, etc. , to achieve the effect of good crystal form, uniform particle size and complete grain development

Active Publication Date: 2021-01-26
쑤저우바오순메이테크놀러지컴퍼니리미티드
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at low concentrations, TiO 2 The volume of the dispersion is too large, resulting in longer reaction times, increased energy consumption, and very low productivity of the equipment
Moreover, in actual industrial production, due to factors such as uneven temperature control caused by a large amount of solvent, it will also have an adverse effect on the uniformity of barium titanate powder.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nano barium titanate powder and preparation method thereof, ceramic dielectric layer and preparation method thereof
  • Nano barium titanate powder and preparation method thereof, ceramic dielectric layer and preparation method thereof
  • Nano barium titanate powder and preparation method thereof, ceramic dielectric layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] At room temperature, titanium dioxide nanopowder was dispersed in deionized water to obtain 200 g of nano titanium dioxide aqueous dispersion with a mass concentration of 48%;

[0078] Under nitrogen protection, add 710g of barium hydroxide and 700mL of deionized water into the three-necked flask, and stir at 90°C until dissolved;

[0079] In the case that barium hydroxide does not precipitate, quickly add the nano-titanium dioxide aqueous dispersion into the three-necked flask, measure the temperature of the mixed system to drop by 2-5°C, and stir rapidly during the rapid addition. After the addition is complete, continue to stir About half an hour to get a uniformly dispersed mixed system;

[0080] Transfer the mixed system to a reaction kettle, seal it, heat it at 120°C for about 16 hours, take out the reaction product after cooling, wash the product several times with deionized water, and dry it at 80°C for several hours to obtain nano barium titanate powder .

[...

Embodiment 2

[0083] The temperature of the high-pressure hydrothermal synthesis reaction was changed to 160° C., and the other conditions were the same as in Example 1 to obtain nano barium titanate powder.

Embodiment 3

[0085] The temperature of the high-pressure hydrothermal synthesis reaction was changed to 220° C., and the other conditions were the same as in Example 1 to obtain nano barium titanate powder.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a nano barium titanate powder and a preparation method thereof, a ceramic dielectric layer and a preparation method thereof, and relates to the technical field of nanometer materials. Wherein, the preparation method of the nano-barium titanate powder includes: rapidly mixing the nano-titanium dioxide aqueous dispersion at a lower temperature with the barium hydroxide aqueous solution at a higher temperature, so that the temperature of the resulting mixed system is lower due to the rapid mixing of the two. The temperature of the barium hydroxide aqueous solution is at least 2°C lower; wherein, the mass concentration of the nano-titanium dioxide aqueous dispersion is not less than 20%; the mixed system is subjected to a high-pressure hydrothermal synthesis reaction, and the resulting reaction product is washed and dried to obtain nano-titanic acid barium powder. The preparation method provided by the invention can obtain high-quality nano-barium titanate powder with small particle size, uniform particle size distribution, good grain development and high purity. Therefore, the nano-barium titanate powder can be well used to manufacture ceramic dielectric layers.

Description

technical field [0001] The present invention relates to nanomaterial synthesis technology, in particular to a nano-barium titanate powder and its preparation method, a ceramic dielectric layer and its manufacturing method, and in particular to an industrialized production method of the nano-barium titanate powder and thus for Ceramic dielectric layers manufactured from raw materials. Background technique [0002] Nano barium titanate (BaTiO 3 ) is widely used in the electronic ceramic industry because of its high dielectric constant, low dielectric loss, high resistivity, excellent insulation properties and high withstand voltage strength. It is the preparation of multilayer ceramic capacitors (MLCC), positive temperature The basic material of electronic components such as coefficient thermistor (PTC) and dynamic random access memory (DRAM). [0003] Improving the uniformity and compactness of the ceramic dielectric layer and reducing the porosity are effective means to in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/626
CPCC04B35/62605C04B35/468C01G23/006C01P2004/64C04B2235/5454C04B2235/781
Inventor 瞿海锋
Owner 쑤저우바오순메이테크놀러지컴퍼니리미티드