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Porous ceramic heating body and preparation method thereof

A porous ceramic and heating body technology, applied in the field of electronic cigarettes, can solve the problems of poor resistance to cold and heat shock, low softening temperature, easy oxidation of heating wires, etc., and achieve stable performance, high product quality, and convenient control.

Inactive Publication Date: 2020-04-10
KEY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the porous ceramic heating element used in electronic cigarettes mainly adopts the process of integrally forming the metal heating wire and the porous ceramic substrate, and then sinters them together at a relatively low temperature (about 500-900°C). However, due to the low sintering temperature, the structural strength is poor. , At the same time, the heat conduction is poor, and it is easy to deposit carbon and produce peculiar smell
At the same time, during sintering, the heating wire containing chromium is easy to oxidize, and there is a hidden danger of producing hexavalent chromium
In addition, low-temperature sintering is bonded by glass powder, and the softening temperature is low, but the product has poor resistance to cold and heat shocks, and there is a problem that the product will burst during use.

Method used

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  • Porous ceramic heating body and preparation method thereof
  • Porous ceramic heating body and preparation method thereof
  • Porous ceramic heating body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] See attached figure 1 , A porous ceramic heating body, comprising a porous ceramic substrate and a metal heating element embedded in the porous ceramic substrate, the porous ceramic substrate including the following raw materials by weight:

[0035]

[0036] The mesh number of the corundum sand is 100 mesh, the mesh number of the quartz sand is 100 mesh, and the mesh number of the diatomite is 100 mesh.

[0037] The pore former is starch.

[0038] The metal heating element is a nickel-iron heating wire or a nickel-iron heating sheet.

[0039] The porosity of the porous ceramic substrate is 40%, and the pore diameter of the pores is 1-60 μm.

[0040] A method for preparing the porous ceramic heating body as described above includes the following steps:

[0041] (1) Drying and ball milling: According to parts by weight, each raw material is baked and dried, and then 0.5% oleic acid is added for ball milling to prepare a mixture;

[0042] (2) Preparation of wax slurry: Dry the mixture...

Embodiment 2

[0052] A porous ceramic heating body includes a porous ceramic substrate and a metal heating element embedded in the porous ceramic substrate, and the porous ceramic substrate includes the following raw materials by weight:

[0053]

[0054] The mesh number of the corundum sand is 200 mesh, the mesh number of the quartz sand is 200 mesh, and the mesh number of the diatomite is 200 mesh.

[0055] The pore former is wood chips.

[0056] The metal heating element is a nickel-chromium heating wire or a nickel-chromium heating sheet.

[0057] The porosity of the porous ceramic substrate is 50%, and the pore diameter of the pores is 20 μm.

[0058] A method for preparing the porous ceramic heating body as described above includes the following steps:

[0059] (1) Drying and ball milling: According to parts by weight, each raw material is baked and dried, and then 0.6% oleic acid is added for ball milling to obtain a mixture;

[0060] (2) Preparation of wax slurry: dry the mixture after ball mil...

Embodiment 3

[0070] A porous ceramic heating body includes a porous ceramic substrate and a metal heating element embedded in the porous ceramic substrate, and the porous ceramic substrate includes the following raw materials by weight:

[0071]

[0072]

[0073] The mesh number of the corundum sand is 350 mesh, the mesh number of the quartz sand is 350 mesh, and the mesh number of the diatomite is 350 mesh.

[0074] The pore forming agent is plastic particles; the plastic particles are PMMA.

[0075] The metal heating element is a nickel-chromium heating wire or a nickel-chromium heating sheet.

[0076] The porosity of the porous ceramic substrate is 55%, and the pore diameter of the pores is 30 μm.

[0077] A method for preparing the porous ceramic heating body as described above includes the following steps:

[0078] (1) Drying and ball milling: According to parts by weight, each raw material is baked and dried, and then 0.8% by mass oleic acid is added for ball milling to prepare a mixture;

[007...

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Abstract

The invention relates to the technical field of electronic cigarettes, in particular to a porous ceramic heating body and a preparation method thereof. The porous ceramic heating body comprises a porous ceramic matrix and a metal heating element. The porous ceramic matrix comprises the following raw materials in parts by weight: 1-20 parts of emery, 30-50 parts of quartz sand, 10-50 parts of diatomite, 1-5 parts of magnesium carbonate, 1-5 parts of calcium carbonate and 5-20 parts of a pore forming agent. The porous ceramic heating body is novel in structure, high in product porosity and highin strength; the metal heating element is not oxidized; the diatomite forms gaps under the action of the pore forming agent, so the porosity of the produced porous ceramic heating body is guaranteed;magnesium carbonate and calcium carbonate can decompose a part of carbon dioxide gas under a high-temperature condition, so porosity is improved; and magnesium oxide and calcium oxide generated afterhigh-temperature decomposition form aluminosilicate together with silicon dioxide and aluminum oxide, so the inter-binding property of material particles is improved, and the structural stability andstrength of the porous ceramic matrix are improved.

Description

Technical field [0001] The invention relates to the technical field of electronic cigarettes, in particular to a porous ceramic heating body and a preparation method thereof. Background technique [0002] At present, the porous ceramic heating element for electronic cigarettes mainly adopts a process of integral molding of a metal heating wire and a porous ceramic matrix, and then sintered together at a lower temperature (about 500-900°C), but due to the low sintering temperature, the structural strength is poor , At the same time, the heat conduction is poor, and it is easy to deposit carbon and produce odor. At the same time, during sintering, the heating wire containing chromium is easy to oxidize, and there is a hidden danger of hexavalent chromium. In addition, low-temperature sintering is bonded by glass powder and has a low softening temperature. However, the produced product has poor resistance to cold and heat shocks, and there is a problem of product explosion during u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/626C04B35/64C04B38/06C04B38/02A24F40/40A24F40/46
CPCC04B35/14C04B35/622C04B35/6261C04B35/64C04B38/02C04B38/0645C04B38/067C04B38/0675C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/5427C04B2235/5436C04B2235/656C04B2235/6567C04B2235/658C04B2235/6582C04B38/0054C04B38/0074
Inventor 陈闻杰张伟荣梁云
Owner KEY MATERIAL
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