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Transparent dielectric paste

A transparent medium and slurry technology, which is applied in the manufacture of electrical components, discharge tubes/lamps, and cold cathodes, and can solve problems such as mismatching thermal expansion coefficients and poor transparency of transparent medium slurry

Inactive Publication Date: 2010-03-31
SICHUAN COC DISPLAY DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the transparent medium slurry prepared by the above method has problems such as poor transparency and mismatching coefficient of thermal expansion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] Preparation of slurry

[0026] Weigh the inorganic glass powder in the mixing tank according to the predetermined weight, and add the predetermined weight of the corresponding organic medium, disperse and mix on the high-speed shear dispersion equipment, and then pass the mixed slurry through the three-axis roller Rolling mill, to further promote the dispersion of inorganic glass powder and its fusion with organic medium, until the fineness of inorganic glass powder in the slurry is less than 5 μm, the resulting slurry is filtered through a filter and vacuum defoamed to obtain the final sample .

[0027] Printing and firing conditions

[0028] A 325-mesh stainless steel screen was used for printing, and the printed glass substrate was placed in a drying oven at 150° C. for about 10 minutes, and the thickness of the dried film layer was measured to be about 30 μm.

[0029] The selected firing curve is 350°C for 20 minutes of degassing, then heating up to 580°C for 20 m...

Embodiment 1

[0037] Preparation of inorganic glass powder: according to the following formula: Bi 2 o 3 19%, B 2 o 3 14%, SiO 2 9%, BaO 18%, ZnO 23%, MgO 3.0%, K 2 O 10%, BeO 4%, a total of 2kg Weigh each oxide and the corresponding carbonate such as BaCO 3 、K 2 CO 3 Or boric acid, after mixing evenly, heat it in a high-temperature solid-phase sintering furnace at 1200°C for 1 hour to obtain a uniform glass liquid. Pour the molten glass into a double-roll tablet press to cool it rapidly and press it into glass fragments with a thickness of about 1mm. Put the glass fragments into a ball mill jar and coarsely pulverize them on the ball mill until the particles of the glass powder are less than 1mm. The glass powder is ball-milled in a planetary ball mill for more than 24 hours to obtain an inorganic powder for preparing slurry.

[0038] Preparation of organic medium: Weigh ethyl cellulose, butyl carbitol acetate and terpineol respectively according to the weight ratio of 6:10:84, ...

Embodiment 2

[0043] Follow the recipe below: Bi 2 o 3 23%, B 2 o 3 14%, SiO 2 13%, BaO 18%, ZnO 23%, MgO 3.0%, K 2 O 4%, BeO 2% Weigh each oxide and the corresponding carbonate such as BaCO 3 23.17%, K 2 CO 3 5.87% or boric acid H 3 BO 3 24.86%, the rest of the conditions are the same as in Example 1 to prepare inorganic glass powder, organic medium and slurry.

[0044] Cast a cylindrical sample with a diameter of about 0.5 cm in a graphite mold with glass liquid, and measure the thermal expansion coefficient on a thermal dilatometer to be 72×10 -7 / °C.

[0045] A sample is prepared on a glass substrate by using the slurry by screen printing, and a spectrophotometer is used to measure a transmittance of 83-88% relative to the substrate glass when the emitted light wavelength is 400-800nm.

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Abstract

The invention relates to transparent dielectric paste, which comprises inorganic glass powder and an organic medium, wherein the inorganic glass powder comprises Bi2O3, B2O3 and SiO2 which account for30 to 70 percent of the total weight of the inorganic glass powder and ZnO, BaO and MgO which account for 20 to 60 percent of the total weight of the inorganic glass powder; and the organic medium comprises an organic solvent of which the boiling point is between 150 and 300 DEG C and resin of which the decomposition temperature is between 200 and 350 DEG C. The transparent dielectric paste is characterized in that the inorganic glass powder also comprises K2O and BeO which account for 5 to 30 percent of the total weight of the inorganic glass powder.

Description

technical field [0001] The invention relates to a transparent dielectric paste, which can be used in the field of thick-film electronic paste, and can also be used in the technical field of gas discharge display. Background technique [0002] As a high-performance flat-panel display device, plasma display (PDP) has many advantages such as fast response speed, wide viewing angle, vivid color, long life and wide range of application environments. Therefore, it is being used more and more in various occasions. Market demand is also increasing. The transparent dielectric layer plays a role in protecting the bus electrodes and inhibiting the excessive growth of the current in the plasma display. At the same time, the space charge generated by the gas discharge is stored on the dielectric wall to reduce the discharge sustaining voltage. The production of the transparent medium layer is an indispensable step in the production process of the plasma display. At the same time, becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/00H01J17/02
Inventor 陈雪生李海燕
Owner SICHUAN COC DISPLAY DEVICES
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