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Cellular heating ceramic containing rare earth oxide and preparation method thereof

A rare earth oxide and honeycomb technology, which is applied in the field of honeycomb heating ceramics and its preparation, can solve the problems of high room temperature resistivity, low density and hardness of honeycomb heating ceramics

Inactive Publication Date: 2012-10-03
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a honeycomb heating ceramics containing rare earth oxides and a preparation method thereof, which can effectively solve the problems in the prior art, especially the room temperature resistivity of the honeycomb heating ceramics is large, the density and less rigid issues

Method used

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  • Cellular heating ceramic containing rare earth oxide and preparation method thereof
  • Cellular heating ceramic containing rare earth oxide and preparation method thereof
  • Cellular heating ceramic containing rare earth oxide and preparation method thereof

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Embodiment 1

[0084] Embodiment 1 of the present invention: a kind of honeycomb heat-generating ceramics containing rare earth oxide, calculated according to molar percentage, it is doped with 0.06% Y by mixed ceramic powder 2 o 3 Prepared from; the mixed ceramic powder, calculated according to molar percentage, consists of 96% MgAl 2 o 4 , 2% SiO2 2 and 2% TiO 2 composition. The MgAl 2 o 4 From Al with a molar ratio of 1:1 2 o 3 It reacts with MgO. The Al 2 o 3 for a-Al 2 o 3 .

[0085] A preparation method of the above-mentioned honeycomb heating ceramics containing rare earth oxides, comprising: taking Al 2 o 3 After calcination, Al with a molar ratio of 1:1 2 o 3 After mixing with MgO and ball milling, put it into a resistance furnace and raise the temperature to 1200°C for 120 minutes for sintering to obtain MgAl 2 o 4 phase; according to the molar percentage calculation, 96% of MgAl 2 o 4 , 2% SiO2 2 , 2% TiO 2 Mixing and grinding, on this basis, according to th...

Embodiment 2

[0086] Embodiment 2: A kind of honeycomb heat-generating ceramics containing rare earth oxide, calculated according to molar percentage, it is doped 0.10% Y by mixed ceramic powder 2 o 3 Prepared from; the mixed ceramic powder, calculated according to molar percentage, consists of 96% MgAl 2 o 4 , 3% SiO 2 and 1% TiO 2 composition. The MgAl 2 o 4 From Al with a molar ratio of 1:1 2 o 3 It reacts with MgO.

[0087]A preparation method of the above-mentioned honeycomb heating ceramics containing rare earth oxides, comprising: adding Al with a molar ratio of 1:1 2 o 3 After mixing with MgO and ball milling, put it into a resistance furnace and raise the temperature to 1200°C for 120 minutes for sintering to obtain MgAl 2 o 4 phase; according to the molar percentage calculation, 96% of MgAl 2 o 4 , 3% SiO 2 , 1% TiO 2 Mixing and grinding, on this basis, according to the molar percentage calculation, doped with 0.10% Y 2 o 3 , add a dispersant and ball mill for 24...

Embodiment 3

[0088] Embodiment 3: A kind of honeycomb heating ceramics containing rare earth oxide, calculated according to molar percentage, it is doped 0.02% Y by mixed ceramic powder 2 o 3 Prepared from; the mixed ceramic powder, calculated according to molar percentage, consists of 96% MgAl 2 o 4 , 1% SiO 2 and 3% TiO 2 composition. The MgAl 2 o 4 From Al with a molar ratio of 1:1 2 o 3 It reacts with MgO.

[0089] A preparation method of the above-mentioned honeycomb heating ceramics containing rare earth oxides, comprising: adding Al with a molar ratio of 1:1 2 o 3 After mixing with MgO and ball milling, put it into a resistance furnace and raise the temperature to 1200°C for 120 minutes for sintering to obtain MgAl 2 o 4 phase; according to the molar percentage calculation, 96% of MgAl 2 o 4 , 1% SiO 2 , 3% TiO 2 Mixing and grinding, on this basis, according to the molar percentage calculation, doped with 0.02% Y 2 o 3 , adding a dispersant and ball milling for 8 h...

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Abstract

The invention discloses a cellular heating ceramic containing rare earth oxide and a preparation method of the cellular heating ceramic. The cellular heating ceramic is prepared by mixing hybrid ceramic powder with 0.02 to 0.1 percent of Y2O3 according to the molar percentage ratio; and the hybrid ceramic powder comprises according to the molar percentage ratio: 96 percent MgAl2O4, 1 to 3 percent of SiO2 and 3 to 1 percent of TiO2 according to the molar percentage ratio. Through the adding of the rare earth oxide Y2O3 in the hybrid ceramic powder, the room temperature resistance rate of the cellular heating ceramic can be reduced effectively, and the density and the hardness of the cellular heating ceramic are improved; according to the molar percentage ratio, when the 0.06 percent of Y2O3 is added in the hybrid ceramic powder, the density and the hardness of the cellular heating ceramic are maximal, and are respectively 93.01% and 349.5HV; and meanwhile, the room temperature resistance rate of the cellular heating ceramic reaches the minimum 5.5*101 omega.m.

Description

[0001] technical field [0002] The invention relates to a honeycomb heating ceramic containing rare earth oxides and a preparation method thereof, belonging to the technical field of energy saving and environmental protection. Background technique [0003] Honeycomb heating ceramics, also known as honeycomb ceramic regenerator. In the early 1990s, Japan Industrial Furnace Company and Japan NKK Company developed a combination of extreme waste heat recovery and low NO x Combustion in one regenerative burner, the regenerator adopts honeycomb heating ceramics, and realizes a high-temperature and low-oxygen combustion technology that is completely different from the traditional combustion mechanism. Because this technology combines energy saving and environmental protection, the combustion technology of this regenerative burner is called the second generation regenerative combustion technology, also known as high temperature air combustion technology. Some large steel compani...

Claims

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Application Information

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IPC IPC(8): C04B35/443C04B35/622
Inventor 刘其斌王学杰袁敏生
Owner GUIZHOU UNIV
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