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Aluminum oxide ceramic heating tube and preparation method thereof

An alumina ceramic tube and alumina ceramic technology, which is applied in the shape of heating elements and ohmic resistance heating parts, can solve the problems of shortening the service life of kiln refractories, high firing temperature, lattice distortion, etc. Thermal conductivity, rapid and uniform temperature rise, and the effect of reducing heat loss

Active Publication Date: 2019-07-23
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MgO, ZrO adopted as described in patent CN 105541302 A and CN 86101452 A 2 , Y 2 o 3 , La 2 o 3 The ternary or quaternary mixed doping formula, these doping ions are solid-solved in the main crystal phase, resulting in lattice distortion, which inhibits the grain boundary migration rate of the main crystal phase at high temperature and promotes the discharge of intergranular pores, but by these The firing temperature of alumina ceramics prepared by doping formula is relatively high (1780-1820°C), which seriously shortens the service life of kiln refractory materials

Method used

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  • Aluminum oxide ceramic heating tube and preparation method thereof
  • Aluminum oxide ceramic heating tube and preparation method thereof
  • Aluminum oxide ceramic heating tube and preparation method thereof

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Embodiment 1

[0028] An alumina ceramic heating tube, comprising an alumina ceramic tube, a silica gel layer, an electric heating tungsten wire, and a silver wire, the silica gel layer 8 is arranged on the outer surface of the alumina ceramic pipe 10, and the electric heating tungsten wire 9 is arranged on the silica gel layer 8 Between the aluminum oxide ceramic tube 10, silver wires 12 are arranged at both ends of the electric heating tungsten wire 9.

[0029] The alumina ceramic tube has a thickness of 0.3mm and a density of 3.9g / cm 3 , the resistance is 0.6Ω; the thickness of the silica gel layer is 1.9mm, and the temperature resistance is 350°C; the thickness of the electric heating tungsten wire is 0.05mm, and the diameter of the silver wire is 0.1 mm.

[0030]The preparation method of the heating tube includes the following steps:

[0031] Preparation of step-alumina ceramic tube mud: add in 100 parts of nano-alumina powder by weight percentage, 0.04 part of Mg(NO 3 ) 2 6H 2 O, ...

Embodiment 2

[0040] An alumina ceramic heating tube, comprising an alumina ceramic tube, a silica gel layer, an electrothermal nickel wire, and a silver wire, the silica gel layer 8 is arranged on the outer surface of the alumina ceramic tube 10, and the electrothermal nickel wire 9 is arranged on the silica gel layer 8 Between the aluminum oxide ceramic tube 10, silver wires 12 are arranged at both ends of the electric heating nickel wire 9.

[0041] The alumina ceramic tube has a thickness of 0.4mm and a density of 3.9g / cm 3 , the resistance is 0.8Ω; the thickness of the silica gel layer is 1.5mm, and the temperature resistance is 340°C; the thickness of the electrothermal nickel wire is 0.04mm, and the diameter of the silver wire is 0.14mm.

[0042] The preparation method of the heating tube includes the following steps:

[0043] Preparation of step-alumina ceramic tube mud: add in 100 parts of nano-alumina powder by weight percentage, 0.02 part of Mg(NO 3 ) 2 6H 2 O, 0.03 parts of...

Embodiment 3

[0052] An alumina ceramic heating tube, comprising an alumina ceramic tube, a silica gel layer, an electric heating tungsten wire, and a silver wire, the silica gel layer 8 is arranged on the outer surface of the alumina ceramic pipe 10, and the electric heating tungsten wire 9 is arranged on the silica gel layer 8 Between the aluminum oxide ceramic tube 10, silver wires 12 are arranged at both ends of the electric heating tungsten wire 9.

[0053] The alumina ceramic tube has a thickness of 0.5mm and a density of 3.9g / cm 3 , the resistance is 1.5Ω; the thickness of the silica gel layer is 1.2 mm, and the temperature resistance is 390° C.; the thickness of the electric heating tungsten wire is 0.03 mm, and the diameter of the silver wire is 0.19 mm.

[0054] The preparation method of the heating tube includes the following steps:

[0055] Preparation of step-alumina ceramic tube mud: add in 100 parts of nano-alumina powder by weight percentage, 0.03 part of Mg(NO 3 ) 2 6H ...

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Abstract

The invention provides an aluminum oxide ceramic heating tube and a preparation method thereof. The aluminum oxide ceramic heating tube comprises an aluminum oxide ceramic tube, a silica gel layer, anelectric heating tungsten wire or nickel wire and silver lead wires, wherein the silica gel layer is arranged on the outer surface of the aluminum oxide ceramic tube; the electric heating tungsten wire or nickel wire is arranged between the silica gel layer and the aluminum oxide ceramic tube; the silver lead wire are arranged at two ends of the electric heating tungsten wire or nickel wire; thealuminum oxide ceramic tube has the thickness of 0.3 to 0.5mm, the density which is no less than 3.9g / cm<3> and the resistance of 0.5 to 2ohm; the silica gel layer has the thickness of 1 to 2mm and can resist the temperature of 300 to 400 DEG C; the thickness of the electric heating tungsten wire or nickel wire is 0.03 to 0.05mm and the diameter of the silver lead wires is 0.1 to 0.2mm. The ultrathin aluminum oxide ceramic heating tube can be prepared through a ceramic extrusion molding technology and has the advantages of capability of being rapidly and uniformly heated, large heating area, small power consumption, long service life and good heat-preservation effect, so that the ultrathin aluminum oxide ceramic heating tube has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of alumina ceramic heating elements, and in particular relates to an alumina ceramic heating element and a preparation method thereof. Background technique [0002] Currently, flue-cured tobacco-type electronic cigarette heating elements on the market mainly include ordinary alumina ceramic heating elements, such as patents CN208369873 U, CN 208274083 U, CN 207968984 U and CN 204498395 U, and zirconia ceramic heating elements, such as patent CN 108966382 A. These two kinds of ceramic heating elements have exposed some defects during use, as described in the patents CN207968984 U and CN104446507, the alumina ceramic heating element adopts the rolling tube process to wind the inner and outer two layers of alumina green cast sheets into ceramic tubes And print tungsten wires between the inner and outer two layers of ceramic green bodies, and finally co-fire the alumina ceramic heating element. This kind of ceramic heatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B41/90H05B3/02H05B3/42
CPCC04B35/10C04B41/009C04B41/52C04B41/90C04B2235/3206C04B2235/3208C04B2235/3418C04B2235/443C04B2235/444C04B2235/483C04B2235/77C04B2235/95H05B3/02H05B3/42C04B41/5133C04B41/5144C04B41/5035
Inventor 赵学国
Owner JINGDEZHEN CERAMIC INSTITUTE
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