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Preparation method of shape-controlled nano ceramic spherical particles for plasma etching resistant thermal spraying

A technology of nano-ceramics and ion corrosion, which is applied in the direction of coating, fusion spraying, metal material coating process, etc., can solve the problems of poor spherical shape of particles, large particle size of yttrium oxide, and few high-temperature furnaces, etc. Uniform particle size, low processing temperature, and improved density

Active Publication Date: 2018-10-26
CHANGZHOU GEOQUIN NANO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current processing temperature for preparing yttrium oxide powder is 1700-1800 °C, and there are few high-temperature furnaces that can process this temperature, making it difficult to process
Moreover, the yttrium oxide crystal grains produced by the precipitation method have huge surface energy, and it is easy to form agglomerates. The obtained yttrium oxide grains have a large particle size and poor spherical shape.

Method used

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  • Preparation method of shape-controlled nano ceramic spherical particles for plasma etching resistant thermal spraying
  • Preparation method of shape-controlled nano ceramic spherical particles for plasma etching resistant thermal spraying
  • Preparation method of shape-controlled nano ceramic spherical particles for plasma etching resistant thermal spraying

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Embodiment 1

[0032] Preparation of morphology-controllable nano-ceramic spherical particles for plasma corrosion-resistant thermal spraying:

[0033] (1) Preparation of yttrium-containing inorganic salt solution: take 53.1L of 1.5mol / L yttrium chloride solution (equivalent to 9kg of yttrium oxide) and put it into a reaction tank, add 212.7L deionized water, and prepare 0.3mol / L chlorination solution Yttrium solution;

[0034] (2) Deploying surfactant: Take 180g of polyethylene glycol 2000 and add 360g of pure water to fully stir until uniform;

[0035] (3) The prepared surfactant is added in the yttrium chloride solution, fully mixed to uniform;

[0036] (4) Take 9kg of sodium carbonate crystals and 5.4kg of sodium hydroxide crystals respectively, add 733.3L of deionized water to fully dissolve, and prepare a 0.3mol / L crystal solution, and add the crystal solution to the chlorinated solution at a flow rate of 3.8L / min in yttrium solution;

[0037] (5) Stop after adding the pH value of t...

Embodiment 2

[0044] Preparation of morphology-controllable nano-ceramic spherical particles for plasma corrosion-resistant thermal spraying:

[0045] (1) Preparation of yttrium-containing inorganic salt solution: get 53.1L of 1.5mol / L yttrium chloride solution and put it into a reaction tank, add deionized water, and prepare 0.4mol / L yttrium chloride solution;

[0046] (2) Deploying surfactant: take 270g sodium lauryl sulfate and add 540g pure water and fully stir until uniform;

[0047] (3) The prepared surfactant is added in the yttrium chloride solution, fully mixed to uniform;

[0048] (4) Get 9kg of sodium carbonate crystals and 5.4kg of sodium hydroxide crystals respectively, add 733.3L of deionized water to fully dissolve, and then prepare a crystal solution of 0.3mol / L, and add the crystal solution to yttrium chloride at a flow rate of 4L / min in solution;

[0049] (5) Stop after adding the pH value of the yttrium chloride solution to 7.5, after fully stirring, aging for 3 hours; ...

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Abstract

The invention discloses a preparation method of shape-controlled nano ceramic spherical particles for plasma etching resistant thermal spraying, belonging to the field of preparation of nano ceramic materials. The preparation method disclosed by the invention comprises the following steps: adding a prepared surfactant into an yttrium chloride solution; adding a precipitator solution into the yttrium chloride solution, aging, and collecting the filter cake to obtain a nano yttria precursor; adding the nano yttria precursor, nano-zirconia and nanometer titania into a ball mill for performing ball milling, adding an organic acid into the ball-milled slurry, controlling the temperature, pH value and viscosity for stirring, and performing spray granulation after stirring so as to obtain spherical powder; and finally, performing high-temperature densification treatment, thereby obtaining the nano ceramic spherical particles. With the adoption of the method disclosed by the invention, the shape of the prepared ceramic particles is regular sphere, and the spherical particles have high spherical degree, excellent fluidity and the like, the powder fluidity, uniformity of the thermal sprayingcoating, compactness and pressure resistance during thermal spraying are greatly ensured, and can be well applied to plasma etching resistant thermal spraying.

Description

technical field [0001] The invention belongs to the field of nano-ceramic material preparation, and in particular relates to a method for preparing nano-ceramic spherical particles with controllable morphology for plasma corrosion-resistant thermal spraying. Background technique [0002] Yttrium oxide has high melting point, phase stability and low thermal expansion, and is an important raw material for preparing high-performance electronic ceramics and anti-plasma corrosion spray powder. And the application of yttrium oxide in the fields of aviation, aerospace, and ceramics also shows its superior performance. It is mainly used to manufacture magnetic materials for microwaves and important materials for military industry. It is also used as an additive for optical glass, ceramic materials, and high-brightness for large-screen TVs. Phosphors and other kinescope coatings. It is also used to manufacture high-temperature strong heat-resistant alloys, aircraft nozzles, etc. In ...

Claims

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Application Information

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IPC IPC(8): C04B35/505C04B35/626C04B35/634C04B35/632C04B35/64C23C4/11
CPCC04B35/505C04B35/626C04B35/62625C04B35/632C04B35/63488C04B35/64C04B2235/3232C04B2235/3244C04B2235/5454C04B2235/656C04B2235/6583C04B2235/661C04B2235/77C04B2235/94C04B2235/95C23C4/11
Inventor 龚晔
Owner CHANGZHOU GEOQUIN NANO NEW MATERIALS
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