Surface coating slurry of platinum heating wire as well as preparation method and coating device of surface coating slurry

A technology of surface coating and coating device, applied in alkali metal silicate coatings, coatings, anti-corrosion coatings, etc. Good strength and impermeability, not easy to fall off, and improve the effect of weathering resistance

Active Publication Date: 2019-01-08
IRICO DISPLAY DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing platinum heating wire surface coating is generally formed by coating with zirconia slurry, which has weak bonding force with the platinum heating wire body and is easy to fall off; the existing spraying method generally adopts plasma thermal spraying technology, plasma The shear stress between the coating applied by thermal spraying technology and the platinum heating wire substrate is about 18N / mm 2 Left and right, the coating is easy to fall off during the installation and bending of the platinum heating wire

Method used

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  • Surface coating slurry of platinum heating wire as well as preparation method and coating device of surface coating slurry
  • Surface coating slurry of platinum heating wire as well as preparation method and coating device of surface coating slurry
  • Surface coating slurry of platinum heating wire as well as preparation method and coating device of surface coating slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The surface coating slurry of platinum heating wire contains 55% water glass, 36% liquid crystal glass substrate material powder, 2.4% polyacrylic acid ammonium, 1.6% carboxymethyl cellulose and 5% Sodium fluorosilicate; Among them, the liquid crystal glass substrate powder contains 66% SiO 2 , 16% Al 2 o 3 , 4% B 2 o 3 , 4% MgO, 7.8% CaO, 2% SrO and 0.2% BaO; the water glass is selected from GB / T 4209 2008 liquid-2 superior product.

[0033] Prepare as follows:

[0034] Step 1. First use absolute ethanol as the medium to wet mix the liquid crystal glass substrate powder for 3 hours, then put it in a drying oven at 200°C for 4 hours, add the dried liquid crystal glass substrate powder to the water glass, and then add Ammonium polyacrylate, carboxymethyl cellulose and sodium fluorosilicate are mixed evenly, ammonia water is added, and the pH value is adjusted to 10 to obtain a suspension slurry;

[0035] Step 2, putting the non-agglomerated suspension slurry prepar...

Embodiment 2

[0037] The surface coating slurry of platinum heating wire contains 50% water glass, 33% TFT-LCD liquid crystal glass substrate material powder, 4.8% polyacrylic acid ammonium, 2.2% carboxymethyl cellulose and 10% sodium fluorosilicate; Among them, TFT-LCD liquid crystal glass substrate powder contains 65% SiO 2 , 15% Al 2 o 3 , 3.8% B 2 o 3 , 4% of MgO, 9.5% of CaO, 2.2% of SrO and 0.5% of BaO; water glass is selected from GB / T 4209 2008 liquid-2 superior product.

[0038] Prepare as follows:

[0039] Step 1. First use absolute ethanol as the medium, wet mix the TFT-LCD liquid crystal glass substrate powder for 3 hours, put it in a drying oven at 180°C for 5 hours, add the dried TFT-LCD liquid crystal glass substrate powder to water Add ammonium polyacrylate, carboxymethyl cellulose and sodium fluorosilicate to the glass, mix well, add ammonia water, adjust the pH value to 10, and obtain a suspension slurry;

[0040] Step 2, putting the non-agglomerated suspension slurr...

Embodiment 3

[0042] The surface coating slurry of platinum heating wire contains 60% water glass, 30% liquid crystal glass substrate material powder, 3% polyacrylic acid ammonia, 2% carboxymethyl cellulose and 5% Sodium fluorosilicate; wherein, liquid crystal glass substrate powder contains 62% SiO 2 , 16% Al 2 o 3 , 4.5% B 2 o 3 , 5% MgO, 9.5% CaO, 2.5% SrO and 0.5% BaO; the water glass is selected from GB / T 4209 2008 liquid-2 superior product.

[0043] Prepare as follows:

[0044] Step 1. First use absolute ethanol as the medium, wet-mix the liquid crystal glass substrate powder for 5 hours, then put it in a drying oven at 210°C for 3 hours, add the dried liquid crystal glass substrate powder to the water glass, and then add Ammonium polyacrylate, carboxymethyl cellulose and sodium fluorosilicate are mixed evenly, ammonia water is added, and the pH value is adjusted to 10 to obtain a suspension slurry;

[0045] Step 2, putting the non-agglomerated suspension slurry prepared in step...

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Abstract

The invention provides surface coating slurry of a platinum heating wire as well as a preparation method and a coating device of the surface coating slurry. The coating slurry comprises 50% to 64% ofwater glass, 25% to 36% of liquid crystal glass substrate powder, 2.4% to 4.8% of a dispersant, 1.6% to 2.8% of a rheological agent and 5% to 15% of a water glass curing agent; the raw materials are mixed, a pH value is adjusted to 10-11, and ball-milling is performed to obtain the surface coating slurry. The coating device comprises a chamber, a rotating mechanism and a crucible, wherein the rotating mechanism is disposed on a side wall of the chamber, fixedly connected with one end of the platinum heating wire and used for driving the platinum heating wire to rotate around the axial direction; the crucible is disposed at the bottom of the chamber, and is opposite to the platinum heating wire and used for holding the surface coating slurry; and a high pressure gas flow tube is inserted into the bottom of the crucible. The surface coating slurry provided by the invention is sprayed by adopting stamping, and the coating has good bonding performance with the platinum heating wire, is noteasy to fall off, and can effectively prevent the platinum heating wire from being oxidized and volatilized at high temperature.

Description

technical field [0001] The invention belongs to the field of liquid crystal glass substrate production, and in particular relates to a surface coating slurry of a platinum heating wire, a preparation method and a coating device thereof. Background technique [0002] Platinum-rhodium alloy heating wire is an important part of the heating of each functional section of the platinum channel in the production process of liquid crystal glass substrates. It provides correct guidance for temperature process regulation. The heating of the entire platinum channel is basically completed by platinum-rhodium alloy heating wire. The temperature is used to control the viscosity of the molten glass to provide qualified and high-quality molten glass for the next process. Platinum heating wires will inevitably undergo high-temperature oxidation and volatilization at high temperatures, resulting in thinner cross-sections of platinum heating wires and affecting their heating life. Coating the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/04C09D7/61C09D5/08B05B9/04B05B13/02
CPCB05B9/0403B05B13/0228C09D1/04C09D5/08C09D5/18C09D7/61
Inventor 赵龙江张峰杨威
Owner IRICO DISPLAY DEVICES
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