Zirconia-zirconium boride double-layer composite ceramic heating element and preparation method thereof

A ceramic heating element and double-layer composite technology, which is applied in the field of electric heating materials, can solve the problems of poor oxidation resistance and achieve the effect of overcoming the double heating system

Inactive Publication Date: 2015-08-12
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a zirconia-zirconium boride double-layer composite ceramic heating element and its preparation method. The heating element of the present invention can provide a high temperature of 2000~2100°C in an oxidizing environment, effectively overcoming the heat generation of zirconia The complex dual heating system during use and the poor oxidation resistance of the zirconium diboride composite ceramic heating element in an oxidizing atmosphere above 1800 ° C

Method used

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  • Zirconia-zirconium boride double-layer composite ceramic heating element and preparation method thereof
  • Zirconia-zirconium boride double-layer composite ceramic heating element and preparation method thereof
  • Zirconia-zirconium boride double-layer composite ceramic heating element and preparation method thereof

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Embodiment 1

[0031] A zirconia-zirconium boride double-layer composite ceramic heating element, the heating element is composed of a heating section, two transition sections and two wiring sections, characterized in that: the heating section and the transition section are made of two layers of ceramics inside and outside Structural composition, the inner layer is ZrB with solid core structure 2 Matrix composite ceramics, the outer layer is ZrO 2 Matrix composite ceramics;

[0032] The preparation method of the zirconia-zirconium boride double-layer composite ceramic heating element comprises the following steps:

[0033] Step 1, take and prepare outer layer ZrO according to mass percentage 2 The raw materials of matrix composite ceramics were added to a vibrating mill, finely ground for 8 hours, then dried at 110°C for 4 hours, and passed through a 30-mesh sieve after drying to obtain ZrO 2 Composite powder, standby; then according to every hectogram ZrO 2 Add the mixed wax at a ratio ...

Embodiment 2

[0038] A zirconia-zirconium boride double-layer composite ceramic heating element, the heating element is composed of a heating section, two transition sections and two wiring sections, characterized in that: the heating section and the transition section are made of two layers of ceramics inside and outside Structural composition, the inner layer is ZrB with solid core structure 2 Matrix composite ceramics, the outer layer is ZrO 2 Matrix composite ceramics;

[0039] The preparation method of the zirconia-zirconium boride double-layer composite ceramic heating element comprises the following steps:

[0040] Step 1, take and prepare outer layer ZrO according to mass percentage 2 The raw materials of matrix composite ceramics are added to a vibrating mill, finely ground for 20 hours, then dried at 150°C for 10 hours, and passed through a 80-mesh sieve after drying to obtain ZrO 2 Composite powder, standby; then according to every hectogram ZrO 2 Add the mixed wax in the pro...

Embodiment 3

[0045] A zirconia-zirconium boride double-layer composite ceramic heating element, the heating element is composed of a heating section, two transition sections and two wiring sections, characterized in that: the heating section and the transition section are made of two layers of ceramics inside and outside Structural composition, the inner layer is ZrB with solid core structure 2 Matrix composite ceramics, the outer layer is ZrO 2 Matrix composite ceramics;

[0046] The preparation method of the zirconia-zirconium boride double-layer composite ceramic heating element comprises the following steps:

[0047] Step 1, take and prepare outer layer ZrO according to mass percentage 2 The raw materials of matrix composite ceramics were added to a vibrating mill, finely ground for 14 hours, then dried at 130°C for 7 hours, and passed through a 60-mesh sieve after drying to obtain ZrO 2 Composite powder, standby; then according to every hectogram ZrO 2 Add the mixed wax at a ratio...

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Abstract

The invention discloses a zirconia-zirconium boride double-layer composite ceramic heating element. The heating section and transition section of the heating element are both composed of an inner layer and outer layer ceramic structure, the inner layer is a solid core structure ZrB2 matrix composite ceramic, and the outer layer is ZrO2 matrix composite ceramic. The ZrO2 matrix composite ceramic is prepared from ZrO2 composite powder, ZrO2 composite powder is prepared from ZrO2, Cao, Y2O3, Al2O3, CeO2, MgO and TiO2. The ZrB2 matrix composite ceramic is prepared from ZrB2, SiC, B4C, Zr, B, C and ZrO2 composite powder materials. The heating element provided by the invention can provide 2000-2100DEG C high temperature in an oxidation environment, and effectively overcomes the defects of complex double heating systems during use of a zirconia heating element, poor antioxidant ability of zirconium diboride composite ceramic heating element in an oxidizing atmosphere above 1800DEG C, and the like.

Description

technical field [0001] The invention relates to the technical field of electric heating materials, in particular to a zirconia-zirconium boride double-layer composite ceramic heating element and a preparation method thereof. Background technique [0002] At present, there are mainly four types of heating elements that can generate high temperatures above 1800°C in an oxidizing atmosphere: zirconium diboride / silicon carbide composite ceramic heating elements, molybdenum disilicide composite ceramic heating elements, zirconia composite ceramic heating elements and chromium Lanthanum acid composite ceramic heating element. Zirconium diboride / silicon carbide composite ceramic heating element is a new type of ultra-high temperature heating element developed in recent years. It is characterized by high melting point, excellent electrical properties, mechanical properties and chemical stability. Below 1800°C, it has good oxidation resistance. However, it cannot be used for a lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/58C04B35/626
Inventor 郭进武陈权马军营李军波郑喜俊
Owner HENAN UNIV OF SCI & TECH
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