High-performance boron carbide ceramic nozzle

A boron carbide ceramic and boron carbide technology, applied in the field of high-performance boron carbide ceramic nozzles, can solve the problems of coarsening of particles, decrease of densification driving force, hindering densification of boron carbide ceramics, etc., and achieve good toughness and improved wear resistance. Effect

Inactive Publication Date: 2017-02-15
TONGCHENG MINGLI BORON CARBIDE PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is believed that one of the reasons hindering the densification of boron carbide ceramics is the boron oxide on the surface of boron carbide powder. The presence o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 400 parts of boron carbide, 20 parts of copper powder, 10 parts of zinc oxide, 8 parts of chromium trioxide, 3 parts of nano-titanium dioxide, 20 parts of magnesium oxide, 20 parts of zirconia, 2 parts of beryllium carbide and 2 parts of tungsten carbide according to weight percentage. 2 parts of zirconium boride, 1.2 parts of coke gem, 3 parts of yellow feldspar, 3 parts of volcanic rock, 1.2 parts of graphite powder, 0.4 part of starch, 25 parts of lanthanum oxide, 2.4 parts of mineral fiber, 3 parts of polyester fiber, 0.5 part of titanium carbide fiber .

[0018] Prepare the molding according to the following steps: ①. Mixing of raw materials: Take the above raw materials according to the weight percentage, mix the boron carbide powder and maltose syrup at a weight ratio of 5:1, and stir evenly.

[0019] ②. Pressing pretreatment and granulation of materials: put the evenly stirred boron carbide mixed powder into the alloy mold, and press it into a cake shape w...

Embodiment 2

[0023] Weigh 450 parts of boron carbide, 25 parts of copper powder, 12 parts of zinc oxide, 10 parts of chromium trioxide, 5 parts of nano-titanium dioxide, 25 parts of magnesium oxide, 25 parts of zirconia, 5 parts of beryllium carbide, and 5 parts of tungsten carbide according to weight percentage. 5 parts of zirconium boride, 2.4 parts of coke gemstone, 6 parts of yellow feldspar, 5 parts of volcanic rock, 1.5 parts of graphite powder, 0.7 part of starch, 35 parts of lanthanum oxide, 2.7 parts of mineral fiber, 4 parts of polyester fiber, 1.1 part of titanium carbide fiber .

[0024] Prepare the molding according to the following steps: ①. Mixing of raw materials: Take the above raw materials according to the weight percentage, mix the boron carbide powder and maltose syrup at a weight ratio of 5:1, and stir evenly.

[0025] ②. Pressing pretreatment and granulation of materials: put the evenly stirred boron carbide mixed powder into the alloy mold, and press it into a cake ...

Embodiment 3

[0029] Weigh 450 parts of boron carbide, 22 parts of copper powder, 11 parts of zinc oxide, 9 parts of chromium trioxide, 4 parts of nano-titanium dioxide, 22 parts of magnesium oxide, 22 parts of zirconia, 3 parts of beryllium carbide and 3 parts of tungsten carbide according to weight percentage. 3 parts of zirconium boride, 2 parts of coke gem, 5 parts of yellow feldspar, 4 parts of volcanic rock, 1.3 parts of graphite powder, 0.6 part of starch, 30 parts of lanthanum oxide, 2.5 parts of mineral fiber, 4 parts of polyester fiber, 1 part of titanium carbide fiber .

[0030] Prepare the molding according to the following steps: ①. Mixing of raw materials: Take the above raw materials according to the weight percentage, mix the boron carbide powder and maltose syrup at a weight ratio of 5:1, and stir evenly.

[0031] ②. Pressing pretreatment and granulation of materials: put the evenly stirred boron carbide mixed powder into the alloy mold, and press it into a cake shape with ...

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PUM

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Abstract

The invention discloses a high-performance boron carbide ceramic nozzle. The high-performance boron carbide ceramic nozzle is prepared from, by weight, 400 to 450 parts of boron carbide, 20 to 25 parts of copper powder, 10 to 12 parts of zinc oxide, 8 to 10 parts of chromic oxide, 3 to 5 parts of nano titanium dioxide, 20 to 25 parts of magnesium oxide, 20 to 25 parts of zirconium oxide, 2 to 5 parts of beryllium carbide, 2 to 5 parts of tungsten carbide, 2 to 5 parts of zirconium boride, 1.2 to 2.4 parts of flint clay, 3 to 6 parts of melilite, 3 to 5 parts of volcanic, 1.2 to 1.5 parts of graphite powder, 0.4 to 0.7 part of starch, 25 to 35 parts of lanthanum oxide, 2.4 to 2.7 parts of mineral fiber, 3 to 4 parts of polyester fiber, and 0.5 to 1.1 parts of titanium carbide fiber. According to a preparation method, a silicon aluminum boron lanthanum compound phase with excellent toughness and wear resistance is formed in sintering, so that the hardness and wear resistance of the high-performance boron carbide ceramic nozzle are improved greatly, defects of conventional ceramic nozzles are avoided, design is reasonable, and popularization value is relatively high.

Description

technical field [0001] The invention relates to the technical field of boron carbide element preparation, in particular to a high-performance boron carbide ceramic nozzle. Background technique [0002] The outstanding advantages of boron carbide are low density, high hardness and large neutron absorption cross-section, and it is mainly used in the form of boron carbide ceramic materials. Boron carbide has a low self-diffusion coefficient due to strong covalent bonding and is difficult to sinter. Densification is usually achieved by hot pressing or hot isostatic pressing sintering. However, on the one hand, hot pressing and hot isostatic pressing can only produce products with relatively small sizes and simple shapes, and on the other hand, the manufacturing costs of hot pressing and hot isostatic pressing are high, which hinders the application of boron carbide materials. [0003] Since ceramic nozzles were introduced into China in the 1990s, the materials have been contin...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/563C04B35/622
CPCC04B35/80C04B35/563C04B35/622C04B2235/3206C04B2235/3227C04B2235/3232C04B2235/3241C04B2235/3246C04B2235/3284C04B2235/3481C04B2235/349C04B2235/3813C04B2235/3817C04B2235/3847C04B2235/407C04B2235/425C04B2235/6567C04B2235/66C04B2235/96C04B2235/9692
Inventor 徐明何天赐
Owner TONGCHENG MINGLI BORON CARBIDE PROD CO LTD
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