Electrothermal composite ceramic brick and preparation method thereof

A technology of electrothermal composite and ceramic bricks, which is applied in the field of electrothermal ceramics, can solve the problems of slow heating rate, low heat utilization rate, and large heat radiation range, and achieve the effect of tight combination and improved efficiency

Inactive Publication Date: 2015-11-04
GUANGDONG TIANBI CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heating wire belongs to the main filament and generates heat, which has the loss of strong light and electromagnetic inductance effect. The range of heat radiation is large, and the resistance wire and the ceramic matrix cannot be completely attached, the contact area is small, and the overall electric heating efficiency is very low.
[0003] The electric heating film uses surface heating as the heat source, with a large contact area and high thermal efficiency. In the prior art, the electric heating film is combined with the wooden composite floor to form a heating plate. The heat generated is hindered when it is transferred upwards, the comprehensive heat utilization rate is low, and the heating rate is slow
In addition, wooden boards are easy to absorb water and get damp, and there are great safety hazards in areas with high humidity, and their service life is very limited. Although the insulating layer in the ordinary composite board structure can improve this to a certain extent, the heat utilization rate and safety of use Sex still needs to be further improved

Method used

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  • Electrothermal composite ceramic brick and preparation method thereof
  • Electrothermal composite ceramic brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Ordinary wall and floor tiles are used as the ceramic substrate with a thickness of 10mm and a water absorption rate of 0.05%.

[0049] In terms of mass percentage, the electrothermal coating raw materials include polyurethane resin 75wt%, natural graphite 5wt%, carbon nanotubes 15wt%, γ-aminopropyltriethoxysilane (KH550 coupling agent) 2wt%, tribasic lead sulfate Stabilizer 3wt%. Grind carbon nanotube raw materials and natural graphite to powder particle size ≤ 1 μm, then mix with resin, coupling agent and stabilizer, prepare slurry with acetone as solvent, and use water-based acrylic resin to adjust slurry viscosity to 3000mPa·s , wherein the mass of acetone is 120wt% of the total mass of carbon exothermic raw materials, binders and auxiliary agents. The heat-generating slurry was coated on the unglazed surface of the ceramic substrate by screen printing, and after drying and curing, an electrothermal coating with a thickness of 1mm was obtained, and the depth of pen...

Embodiment 2

[0055] Ordinary wall and floor tiles are used as the ceramic base, the thickness is 8mm, and the water absorption rate is 0.06%.

[0056] In terms of mass percentage, the electrothermal coating raw materials include 35wt% of polyurethane resin, 20wt% of water-based acrylic acid, 15wt% of carbon nanotubes, 25wt% of graphene, 2wt% of pentabromotoluene flame retardant, γ-glycidyl ether oxypropyltrimethoxy Silane (KH560 coupling agent) 3wt%. First, carbon nanotubes and graphene are mixed and ground until the particle size of the powder is ≤1 μm, and then mixed with resin, coupling agent and flame retardant, etc., and the slurry is prepared with anhydrous ethanol as a solvent, and an acrylate active diluent is used to The viscosity of the slurry is adjusted to 2000mPa·s, wherein the mass of absolute ethanol is 200wt% of the total mass of the carbon exothermic raw material, binder and auxiliary agent. The heat-generating slurry was coated on the unglazed surface of the ceramic subs...

Embodiment 3

[0062] Ordinary wall and floor tiles are used as the ceramic substrate with a thickness of 15mm and a water absorption rate of 0.07%.

[0063] In terms of mass percentage, the electrothermal coating raw materials include 20wt% of water-based acrylic acid, 25wt% of water-based epoxy resin, 25wt% of water-based silicone resin, 15wt% of graphene, 14wt% of carbon nanofiber, and 1wt% of dioctyl phthalate plasticizer %. First, mix and grind carbon nanotubes and graphene until the particle size of the powder is ≤1 μm, then mix with resin and plasticizer, prepare slurry with toluene as solvent, and use acrylate active diluent to adjust the viscosity of the slurry to 1500mPa· s, wherein the mass of toluene is 250wt% of the total mass of carbon exothermic raw materials, binders and auxiliary agents. The heat-generating slurry was coated on the unglazed surface of the ceramic substrate by spraying, and after drying and curing, an electrothermal coating with a thickness of 8mm was obtain...

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Abstract

The invention discloses an electrothermal composite ceramic brick and a preparation method thereof. An electrothermal coating layer, a guiding-out wiring electrode, a coating insulation packaging waterproof layer and an application foaming ceramic layer coat an unglazed surface of a ceramics substrate in order. The electrothermal coating layer coats the unglazed surface of the ceramics substrate in an electrothermal slurry form, the electrothermal slurry permeates the green body of the ceramics substrate, and the penetration depth is less than the thickness of the ceramics substrate and more than 0.5mm. Because of the penetration, the electrothermal coating layer of the electrothermal composite ceramic brick is combined with the ceramics substrate tightly, a surface heating mode is achieved, the thermal efficiency is high, normal and safe usage can be achieved under a voltage of 24-380V, the heating power is 90-120w / m<2>, and the temperature of the ceramics substrate can reach 18-50 DEG C through a temperature control device. The insulation packaging waterproof layer and the foaming ceramic layer outside the electrothermal coating layer can prevent heat from outward transmission effectively, heat loss is lowered, and the whole safety and reliability of the ceramic brick are raised.

Description

technical field [0001] The invention relates to an electrothermal ceramic, in particular to an electrothermal composite ceramic brick and a preparation method thereof. Background technique [0002] Electric heating ceramics are widely used in household heating, heat preservation rooms, saunas, etc. Usually, electric heating materials such as resistance wires, electric heating tubes, etc. are buried in the ceramic substrate, and the ceramic substrate is heated after being energized. The heating wire belongs to the main filament and generates heat, which has the loss of strong light and electromagnetic inductance effect, and the heat radiation range is large, and the resistance wire and the ceramic substrate cannot be completely attached, the contact area is small, and the overall electric heating efficiency is very low. [0003] The electric heating film uses surface heating as the heat source, with a large contact area and high thermal efficiency. In the prior art, the elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/28H05B3/18C04B41/89
Inventor 王正旺饶平根卢佳兵罗华储璐陈鹏程
Owner GUANGDONG TIANBI CERAMICS
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