Preparation method of nano dysprosium oxide for dielectric ceramic capacitor

A technology of nano-dysprosium oxide and dielectric ceramics, applied in the direction of rare earth metal oxides/hydroxides, lanthanide oxides/hydroxides, etc., can solve problems such as grinding, achieve easy dispersion, reasonable design, and promising application prospects broad effect

Pending Publication Date: 2020-04-17
江西鑫泰功能材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of existing rare earth oxides is generally 3 microns to 5 microns, and it is difficult to grind to within 100 nanometers by physical means, which brings a bottleneck for the miniaturization and miniaturization of dielectric ceramics.

Method used

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  • Preparation method of nano dysprosium oxide for dielectric ceramic capacitor
  • Preparation method of nano dysprosium oxide for dielectric ceramic capacitor
  • Preparation method of nano dysprosium oxide for dielectric ceramic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In a 2L three-necked flask, add 0.5L of dysprosium chloride (DyCl 3 ) solution, its dysprosium oxide (Dy 2 o 3 ) conversion concentration is 50g / L, free acid concentration is 0.1mol / L, stirring and heating to 50°C;

[0027] Precipitating agent sodium carbonate (Na 2 CO 3 ) solution, its concentration is 0.5mol / L, is slowly added dropwise in the above-mentioned dysprosium chloride solution, and the dropwise addition time is 1h, and the final pH value of the solution after precipitation is controlled between 6.0-6.5;

[0028] After precipitation, carry out aging treatment, the aging temperature is 50°C, and the aging time is 1h;

[0029] After the aging treatment, the slurry is filtered and washed with warm water at 50-60°C until the conductivity of the filtrate is less than 1 μs / cm;

[0030] The washed filter cake was dried overnight at 110°C and then roasted at a temperature of 700°C for 5 hours;

[0031] After roasting, the oxide product is crushed and sieved to ...

Embodiment 2

[0033] Carry out according to the preparation method described in embodiment 1, difference is to use dysprosium oxide (Dy 2 o 3 ) conversion concentration is 50g / L dysprosium sulfate (Dy 2 (SO 4 ) 3 ) solution as starting material for precipitation reaction.

Embodiment 3

[0035] Carry out according to the preparation method described in embodiment 1, difference is to use dysprosium oxide (Dy 2 o 3 ) conversion concentration of dysprosium nitrate (Dy(NO 3 ) 3 ) solution as starting material for precipitation reaction.

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Abstract

The invention discloses a preparation method of nano dysprosium oxide for a dielectric ceramic capacitor, and aims to solve the problems of large particle size and poor dispersion performance of existing rare earth oxide. The method comprises the following specific steps: step 1, preparing a dysprosium salt solution and an alkaline precipitant solution; step 2, stirring and heating the dysprosiumsalt solution to 30-100 DEG C, slowly dripping the alkaline precipitant solution into the dysprosium salt solution, and controlling the final pH value of the precipitated solution to be 4.5-9.0; step3, carrying out aging treatment on a precipitate precursor; step 4, filtering and water-washing the precipitate precursor subjected to aging treatment; and step 5, drying, roasting, crushing and screening the washed precipitate precursor to obtain a finished product. The obtained nano rare earth oxide finished product can reach the nano size, is easy to disperse, and is especially suitable for production of miniaturized or microminiaturized dielectric ceramic capacitors.

Description

technical field [0001] The invention relates to the field of dielectric ceramic capacitors, in particular to a preparation method of nano-dysprosium oxide for miniaturized and miniaturized dielectric ceramic capacitors. Background technique [0002] Ceramic materials are an indispensable material in human life and modernization. Its excellent performance is unique in the field of materials and has been highly valued by people. It plays a vital role in the production of globalization and portable electronic products. [0003] Dielectric ceramics, also known as dielectric ceramics, are functional ceramics that have the ability to polarize under the action of an electric field and can establish an electric field in the body for a long time. According to the use and performance, it can be divided into electrical insulation, capacitor, piezoelectric, pyroelectric and ferroelectric ceramics. It has the characteristics of high insulation resistivity, small dielectric constant, sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/224
CPCC01P2004/04C01P2004/62C01P2006/80
Inventor 刘卫华秦庆新戴连欣黄雍
Owner 江西鑫泰功能材料科技有限公司
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