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Medium printing slurry and preparation method thereof

A medium printing and paste technology, which is applied in the field of preparation of ultra-fine-grained medium printing paste, can solve the problems of easy precipitation and uneven powder dispersion, and achieve the effects of not easy precipitation, convenient and simple viscosity adjustment process and easy control.

Inactive Publication Date: 2019-12-03
四川华瓷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a preparation method of ultra-fine-grain medium printing slurry and the product obtained by the method, which solves the problems of uneven powder dispersion and easy precipitation in the existing pulping method in the prior art

Method used

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  • Medium printing slurry and preparation method thereof
  • Medium printing slurry and preparation method thereof
  • Medium printing slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare a 10L nylon ball mill tank, add 5 kg Φ3 zirconium balls, 5 kg Φ10 zirconium balls;

[0032] Step 1: Add 4 kg of ultra-fine-grain medium powder Ba with a median particle size D50 of 0.30 μm to the nylon ball mill tank 2 Ti 9 o 20 , 0.1 kg of dispersant polyethylene glycol octyl phenyl ether, 0.6 kg of toluene, 0.6 kg of ethanol, ball milling speed 40 rpm, ball milling for 4 hours;

[0033] Step 2: Add 0.15 kg of ethyl cellulose, 0.04 kg of DBP, 0.2 kg of turpentine, 0.7 kg of terpineol, mill at a speed of 40 rpm, and mill for 16 hours;

[0034] Step 3: The material is filtered with a 325-mesh filter, and the discharged slurry is impacted with 20KHz ultrasonic waves for 30 minutes at 25°C, stirred for 1 hour under the negative pressure of the draft, and the wind speed is 5 m / s, so that the toluene and ethanol are completely volatilized , adjust the viscosity to 36000mPa·S printing requirements, to obtain ultra-fine grain medium printing paste.

[0035] The obt...

Embodiment 2

[0037] Prepare a 10L ceramic ball mill jar, add 5 kg Φ3 zirconium balls, 5 kg Φ10 zirconium balls;

[0038] Step 1: Add 4 kg of ultra-fine-grain medium powder BaTi with a median particle size D50 of 0.25 μm to the nylon ball mill tank 4 o 9 , 0.12 kilograms of dispersant polyethylene glycol octyl phenyl ether, 0.5 kilograms of toluene, 0.5 kilograms of ethanol, 0.2 kilograms of isopropanol, ball milling speed 40 rpm, ball milling for 5 hours;

[0039] Step 2: Add 0.2 kg of ethyl cellulose, 0.05 kg of DBP, 0.1 kg of turpentine, 0.65 kg of diethylene glycol ether, ball mill at 40 rpm, and ball mill for 17 hours;

[0040] Step 3: The material is filtered with a 325-mesh filter, and the discharged slurry is impacted with 20KHz ultrasonic wave at 25°C for 20 minutes, stirred for 2 hours under the negative pressure of the draft, and the wind speed is 1 m / s, so that toluene, ethanol, iso The propanol is completely volatilized, and the viscosity is adjusted to 32000mPa·S printing re...

Embodiment 3

[0043] Prepare a planetary mill, 4 2L nylon ball mill tanks, 5 kg Φ1 zirconium balls, 5 kg Φ3 zirconium balls;

[0044] Step 1: Add 4 kg of ultra-fine-grain medium powder BaTiO with a median particle size D50 of 0.16 μm to the nylon ball mill tank 3 , 0.16 kilograms of dispersant polyethylene glycol octyl phenyl ether, 0.6 kilograms of toluene, 0.6 kilograms of propyl acetate, ball milling speed 300 rpm, ball milling 1 hour;

[0045] Step 2: Add 0.28 kg of ethyl cellulose, 0.1 kg of DOP, 0.2 kg of turpentine, 0.7 kg of terpineol, mill at a speed of 260 rpm, and mill for 2 hours;

[0046] Step 3: The material is filtered with a 400-mesh filter, and the discharged slurry is impacted with 20KHz ultrasonic waves for 30 minutes at 25°C, stirred for 2 hours under negative pressure, and the wind speed is 1 m / s to make toluene and propyl acetate Completely volatilize, adjust the viscosity to 28000mPa·S printing requirements, and get ultra-fine grain medium printing paste.

[0047] T...

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Abstract

The invention discloses a preparation method of ultra-fine crystal medium printing slurry and a product obtained by the method. The method comprises the following steps: 1, adding ultra-fine crystal medium powder, a low-boiling-point solvent and a dispersant into a ball milling tank, and carrying out ball milling dispersion; 2, adding a high-boiling-point solvent, an adhesive, a plasticizer and adiluent, and carrying out ball milling; and 3, carrying out filtering by using a filter screen, carrying out discharging, carrying out ultrasonic treatment on discharged slurry, carrying out stirringunder a condition of air suction and negative pressure to completely volatilize the low-boiling-point solvent, and adjusting the viscosity to 22000-36000 mPa*S to obtain the ultra-fine crystal mediumprinting slurry. The problems of uneven dispersion and easy precipitation of fine crystal powder in a pulping mode in the prior art are solved.

Description

technical field [0001] The invention relates to the field of chip electronic components, in particular to a method for preparing ultrafine-grain medium printing paste and products obtained by the method. Background technique [0002] In recent years, with the development of semiconductor IC and power supply technology, the voltage of IC used in various portable electronic devices has been lowered, and the disadvantage of capacitance drop caused by DC bias has been weakened. Therefore, portable electronic devices including smartphones begin to use multilayer ceramic capacitors (MLCC) of 100 μF and above as smoothing capacitors. frequency noise. High-capacity MLCCs began to partially replace electrolytic capacitors. [0003] However, due to structural and technical reasons, the higher the capacitance of MLCC, the more internal dielectric and electrode stacks, the more obvious the stress and bending deformation caused by structural mismatch, which will seriously lead to inter...

Claims

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Application Information

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IPC IPC(8): C04B41/87
CPCC04B41/5041C04B41/5042C04B41/87C04B41/4535C04B41/463C04B41/472C04B41/4896C04B41/4803
Inventor 石吉伟曾雨杨晓东倪福松梁丽
Owner 四川华瓷科技有限公司
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