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A method for preparing anti-oxidation molybdenum products

A technology of molybdenum oxide and products, which is applied in the field of molybdenum materials, can solve problems such as insufficient oxidation resistance, achieve high toughness, improve strength and density, and avoid brittleness

Active Publication Date: 2018-11-27
LUOYANG KEWEI MOLYBDENUM & TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of insufficient oxidation resistance of existing molybdenum products, the present invention provides a method for preparing oxidation-resistant molybdenum products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing an anti-oxidation molybdenum product, comprising the following steps: step 1, placing the molybdenum product in a mixed acid composed of sulfuric acid and nitric acid with a volume ratio of 3:1, heating it in a water bath at 40°C for 65 minutes, and then filtering , and wash the filtrate with deionized water, stop washing when the deionized water reaches neutrality, dry the filtrate in vacuum, then mix the molybdenum product and the silane coupling agent with the same weight, and treat it with ultrasonic vibration for 30min, After suction filtration, dry the filtrate in a vacuum drying oven at 100-110°C for 1-2 hours to prepare a modified molybdenum product for later use; wherein, the ratio of the volume of the mixed acid composed of sulfuric acid and nitric acid to the weight of the molybdenum product is 1000mL: 1g.

[0021] Step 2, according to the volume ratio of 1:1.2:1.85, successively take the cerium acetate solution with a concentration of ...

Embodiment 2

[0027] A method for preparing an anti-oxidation molybdenum product, comprising the following steps: Step 1, placing the molybdenum product in a mixed acid composed of sulfuric acid and nitric acid with a volume ratio of 3:1, heating it in a water bath at 40°C for 50 minutes, and then filtering , and the filtrate was washed with deionized water until the pH of the aqueous solution was neutral, the filtrate was vacuum-dried, then the filtrate and the silane coupling agent of the same weight were mixed, ultrasonically oscillated for 24 minutes, and after suction filtration Vacuum-dried to obtain a modified molybdenum product for future use; wherein, the ratio of the volume of the mixed acid composed of sulfuric acid and nitric acid to the weight of the molybdenum product is 1000mL: 1g.

[0028] Step 2, according to the volume ratio of 1:1.2:2.0, successively take the cerium acetate solution with a concentration of 0.4mol / L, the potassium hydroxide solution with a concentration of ...

Embodiment 3

[0033] A method for preparing an anti-oxidation molybdenum product, comprising the following steps: Step 1, placing the molybdenum product in a mixed acid composed of sulfuric acid and nitric acid with a volume ratio of 3:1, heating it in a water bath at 40°C for 70 minutes, and then filtering And the filtrate was washed with deionized water until the aqueous solution was neutral, then vacuum-dried, then the filtrate and the silane coupling agent of the same weight were mixed, ultrasonically oscillated for 20 minutes, vacuum-dried after suction filtration to obtain modified molybdenum The product is ready for use; wherein, the ratio of the volume of the mixed acid composed of sulfuric acid and nitric acid to the weight of the molybdenum product is 1000mL: 1g.

[0034] Step 2, according to the volume ratio of 1:1.2:1.8, successively take the cerium acetate solution with a concentration of 0.4mol / L, the potassium hydroxide solution with a concentration of 3.0mol / L and the hydroge...

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PUM

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Abstract

The invention discloses a method for preparing an oxidation resisting molybdenum product. The method comprises a step of manufacturing a first-order molybdenum product and a step of spraying the surface of the first-order molybdenum product to prepare an oxidation resisting co-doped molybdenum product, wherein silicon powder, hafnium powder, boron carbide and nanometer cerium dioxide are used for dispersing molybdenum to prepare the first-order molybdenum product; the first-order molybdenum product is dispersed to contain a high-temperature phase and alloy elements inside; heat-stable oxide particles are formed in the oxidation process; an oxide film is formed on the surface of the product in the oxidation process to stop continuous erosion of oxygen to the molybdenum product; and an oxidation resisting layer is sprayed on the surface of the first-order molybdenum product, and is tightly combined with a dispersing layer to largely delay the internal dispersion path of the oxidized molybdenum product.

Description

technical field [0001] The invention relates to the technical field of molybdenum materials, in particular to a method for preparing anti-oxidation molybdenum products. Background technique [0002] Molybdenum and molybdenum alloys have excellent mechanical and physical properties such as high-temperature strength and high-temperature hardness, good thermal conductivity and electrical conductivity, and low thermal expansion coefficient. They are widely used in metallurgy, machinery, energy, chemical industry, national defense, and electronics. In glass smelting, molybdenum electrodes are used as heating elements. Molybdenum rods, bars, molybdenum finish-rolled plates and other molybdenum products are glass melting electrodes and heat shields and heating elements in various furnace bodies. Oxidation easily occurs when exposed to air, such as oxidation at 600~700°C to generate MoO 3 , causing the performance of the alloy to decrease, and the life of the molybdenum product to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C12/02C23C4/06C23C4/134C01F17/00
CPCC01F17/206C23C4/06C23C12/02
Inventor 张灵杰
Owner LUOYANG KEWEI MOLYBDENUM & TUNGSTEN
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