Composite magnesium oxide thin film for plasma display panel and its preparation method and application

A display panel, magnesium oxide technology, applied in cold cathode manufacturing, electrode system manufacturing, discharge tube/lamp manufacturing, etc. The effect of enhanced sputtering capability and high process efficiency

Inactive Publication Date: 2016-10-19
BAOTOU RES INST COLLEGE OF ENG PKU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] That is, the technical problem solved by the present invention is: the production cost of the preparation method of magnesium oxide film on the existing PDP display panel is high, the utilization rate of raw materials is low, and the preparation of the composite dielectric protective layer material needs two processing steps to complete

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  • Composite magnesium oxide thin film for plasma display panel and its preparation method and application
  • Composite magnesium oxide thin film for plasma display panel and its preparation method and application
  • Composite magnesium oxide thin film for plasma display panel and its preparation method and application

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preparation example Construction

[0046] The preparation method of composite magnesium oxide thin film of the present invention comprises the following steps:

[0047] (1) coating the coating solution A on the surface of the substrate (1), and drying to obtain a film a;

[0048] (2) coating the coating solution B on the film a to prepare the film b;

[0049] (3) obtain composite magnesium oxide film after annealing;

[0050] Wherein, the coating liquid A is prepared by aging a mixed liquid containing magnesium salt, dispersant, stabilizer and organic solvent, and the coating liquid B is made of magnesium oxide microcrystalline particles or doped magnesium oxide microcrystalline The particles are dispersed in the same solution as coating solution A;

[0051] When coating liquid B contains magnesium oxide microcrystalline particles, the molar ratio of magnesium in film b to film a is 0.2 to 25:1; when coating liquid B contains doped magnesium oxide microcrystalline particles, the film The molar ratio of the m...

Embodiment 1

[0060] Preparation of coating solution A: Weigh 5.35g of magnesium acetate tetrahydrate, dissolve it in 62.5mL of absolute ethanol, stir and dissolve fully, then add 0.75g of glacial acetic acid and polyethylene glycol 400 (the amount is 5% of the mass of the magnesium salt). %), mixed evenly, stirred and aged for 24h to obtain coating liquid A;

[0061] Preparation of coating liquid B: take 10 g of the above coating liquid A, add 1 g of calcium oxide magnesium microcrystalline particles, and obtain coating liquid B after ultrasonic dispersion; wherein, the calcium oxide magnesium microcrystalline particles are mixed with magnesium oxide and calcium oxide, and mixed in the air It is obtained by roasting at 1600°C under atmosphere; 2+ with Mg 2+ The molar ratio of the calcium oxide is 0.01:1. The particle size of calcium oxide and magnesium crystals is determined by Hitachi S4800 field emission scanning electron microscope and Mastersizer2000 laser particle size measuring inst...

Embodiment 2

[0068] Preparation of coating solution A: Weigh 2.38g of magnesium chloride, dissolve it in 62.5mL of absolute ethanol, stir and dissolve fully, then add 1.5g of glacial acetic acid and polyethylene glycol octylphenyl ether (the amount is 100% of the magnesium salt quality). %), mixed evenly, stirred and aged for 36h to obtain coating solution A;

[0069] Preparation of coating liquid B: take 10 g of the above coating liquid A, add 0.1 g of calcium oxide magnesium microcrystalline particles, and obtain coating liquid B after ultrasonic dispersion; the preparation method of the calcium oxide magnesium microcrystalline particles is: use 30-50 nm High-purity magnesium oxide microcrystalline particles are directly mixed with calcium oxide. After fully mixed, nano-sized magnesium oxide microcrystals are uniformly attached to the outer surface of calcium oxide particles, and calcined at 1200°C in an oxygen atmosphere to obtain calcium oxide magnesium microcrystalline particles; among...

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Abstract

The invention relates to the field of plasma displays, and in particular relates to a composite magnesium oxide film applied to a plasma display panel and a preparation method and application thereof. The composite magnesium oxide film comprises a magnesium oxide coating used a base layer (2) and a microcrystalline particle layer (3). The microcrystalline particle layer (3) comprises a magnesium oxide coating and microcrystalline particles. The microcrystalline particles comprise oxide microcrystalline particles. The molar ratio of the oxide of the oxide microcrystalline particles and the magnesium oxide of the magnesium oxide coating of the microcrystalline particle layer (3) is 0.4 to 24:1. The magnesium oxide film is prepared through two spin coating processes and a sintering process. A preparation method which comprises two steps of plating the magnesium oxide film and preparing the magnesium oxide microcrystalline particle layer on the surface of the magnesium oxide film in the existing process is improved. The process efficiency is high. According to the invention, the prepared composite magnesium oxide film can be applied to PDP and other gas discharge devices; the full white field brightness uniformity can reach above 90%; and the discharge voltage is reduced by more than 5V.

Description

technical field [0001] The invention relates to the field of plasma display screens, in particular to the field of dielectric protective layers for plasma display panels, and in particular to a composite magnesium oxide film for plasma display panels and its preparation method and application. Background technique [0002] Plasma Display Panel (PDP) has become one of the mainstream products of flat panel display due to its advantages such as self-illumination, good color reproduction, high brightness, and fast response speed. When the PDP is working, a high voltage is applied to generate a plasma discharge in the PDP discharge area, and the ultraviolet rays generated during the discharge excite the phosphor to emit visible light. [0003] As one of the key materials in PDP, MgO is mainly used to protect the dielectric layer of the plasma display and provide secondary electrons, thereby reducing the ignition voltage, increasing the brightness of the device while reducing powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J17/02H01J17/49H01J9/02
Inventor 严群王连连倪烨韧田磊唐李晟
Owner BAOTOU RES INST COLLEGE OF ENG PKU
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