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Preparation and surface modification method of stable titanium dioxide particle

A titanium dioxide and surface modification technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of preparation and control blank, and achieve the effect of stable and consistent properties, high yield and good stability

Inactive Publication Date: 2018-11-16
无锡睿龙新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it basically focuses on nanometer or submicron size or macroscopic crystallographic research, while the preparation and control of micron-sized titanium dioxide with stable performance is still blank.

Method used

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  • Preparation and surface modification method of stable titanium dioxide particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. 1000 grams of industrial grade rutile titanium dioxide (purity greater than 95%, particle size distribution D50 is 0.25 microns, D 10 0.031 micron, D 90 0.84 microns) evenly spread in a refractory cordierite saggar with a size of (30cm x 20cmx 10cm), and the laying height of the titanium dioxide raw material is 5 cm.

[0038] Place the cordierite sagger in a high-temperature kiln, raise the temperature at a rate of 1-2°C / min in an air atmosphere, and raise the temperature to 950°C, and keep it warm for 1.5 hours. Then turn off the heat and let the kiln cool down naturally.

[0039] 2. When the temperature of the kiln drops below 200°C, take out the cordierite sagger with a tool. Take out the sintered titanium dioxide in the sagger. First use an alumina mortar to grind it manually, and then put about 300 grams of coarse particles into a 1L zirconia ball mill jar, use zirconia balls as the medium, and use a laboratory small-scale agitating ball mill for pulverizatio...

Embodiment 2

[0043] 1. 1000 grams of industrial grade rutile titanium dioxide (purity greater than 95%, particle size distribution D 50 0.44 microns, D 100.15 microns, D90 is 1.24 microns) evenly spread in a refractory alumina saggar with a size of (30cm x 20cm x 10cm), and the laying height of titanium dioxide raw materials is 6 cm. Place the sagger in a high temperature kiln. In the air atmosphere, the temperature was raised at a rate of 1-2°C / min, the temperature was raised to 1050°C, and the temperature was kept for 1.5 hours. Then turn off the heat and let the kiln cool down naturally.

[0044] 2. When the temperature of the kiln drops below 200°C, take out the alumina sagger with tools. Take out the sintered titanium dioxide in the sagger. First use an alumina mortar to grind it by hand, and then put about 350 grams of coarse particles into a 1L zirconia ball mill jar, use zirconia balls as the medium, and use a small laboratory stirring ball mill for pulverization. The speed of ...

Embodiment 3

[0048] 1. 1000 grams of industrial grade rutile titanium dioxide (purity greater than 95%, particle size distribution D50 is 0.25 microns, D 10 0.031 micron, D 90 0.84 micron) evenly spread in a refractory cordierite sagger with a size of (30cm x 20cm x 10cm), and the laying height of titanium dioxide raw material is 7cm.

[0049] Place this cordierite sagger in a high temperature kiln. In the air atmosphere, the temperature was raised at a rate of 1-2°C / min, and the temperature was raised to 1150°C, and kept for 1.5 hours. Then turn off the heat and let the kiln cool down naturally.

[0050] 2. When the temperature of the kiln drops below 200°C, take out the cordierite sagger with a tool. Take out the sintered titanium dioxide in the sagger. First use an alumina mortar to grind it by hand, and then put about 400 grams of coarse particles into a 1L zirconia ball mill jar, use zirconia balls as the medium, and use a laboratory small-scale agitating ball mill for pulverizati...

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Abstract

The invention provides a preparation and surface modification method of a stable titanium dioxide particle. According to the method, commercial titanium dioxide powder is burned at a high temperatureto prepare a novel titanium dioxide particle, which has the advantages of high density, low specific surface area, micrometer level particle distribution, stable and high dielectric constant, and lowdielectric loss. After one step surface modification, the novel titanium dioxide particle can be used to prepare high performance high frequency copper-clad plates.

Description

technical field [0001] The invention relates to the technical field of inorganic compounds, in particular to a preparation and surface modification method of stable titanium dioxide particles. Background technique [0002] Titanium dioxide (chemical formula TiO 2 , also known as titanium dioxide) is an important inorganic chemical product, which has important uses in coatings, inks, papermaking, plastic rubber, chemical fiber, ceramics and other industries. Titanium dioxide has two main crystal forms: anatase and rutile. Titanium dioxide has excellent electrical properties due to its high dielectric constant. The dielectric constant of the rutile type varies with the orientation of the crystal. The average value of the measured dielectric constant is usually between 80 and 120, while the dielectric constant of the anatase titanium dioxide is relatively low, only about 40. [0003] Nano-scale materials are the trend in recent years, but due to their small particle size, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08
CPCC01G23/08C01P2004/61C01P2006/11C01P2006/12
Inventor 向中荣高玉佳
Owner 无锡睿龙新材料科技有限公司
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