Cobalt-coated ceramic composite powder and preparation method and application thereof

A technology of ceramic composite and ceramic powder, applied in the directions of additive manufacturing, transportation and packaging, metal processing equipment, etc., can solve the problems of reducing the mechanical properties of formed parts, affecting the interface bonding strength, peeling off the surface ceramic layer, etc., to reduce the thermal expansion coefficient, It is not easy to break and agglomerate, and the effect of high interface bonding strength

Pending Publication Date: 2021-03-26
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an improved type of ceramics called bismuth-cocyanide (BSC) or tungsten bronze (TBC). These materials have excellent physical characteristics such as high strength at elevated temperatures compared to traditional methods like porcelain casting processes. They allow for better control on how they behave after being heat treated into solid state. By adjusting their chemical composition, BCS coatings may contain different metals depending upon its desired use. Additionally, this new modification allows for more consistently dispersible components within the resulting mixture while still providing strong cohesive force between them. Overall these technical improvements make it possible to create stronger structures made from pure ceramers.

Problems solved by technology

This patented technical problem addressed in this patents relates to developing a type of cathode ray tube display called LCD displays used in dentistry because they have excellent visual effects compared to other types like plasma screens. These devices use special glass filled with rare earth oxide crystals, making their physical structure stronger without losing weight over time. Additionally, these techniques involve combining multiple layers made from various chemical substances together to create a single body component instead of individually shaping each individual piece separately.

Method used

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  • Cobalt-coated ceramic composite powder and preparation method and application thereof
  • Cobalt-coated ceramic composite powder and preparation method and application thereof
  • Cobalt-coated ceramic composite powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 2.5 g of cobalt acetate tetrahydrate was dissolved in 18 ml of absolute ethanol to obtain a homogeneously dispersed lyosol.

[0049] Add 3.4g Al to the lyosol 2 o 3 powder and 15ml of butyric acid solution with a concentration of 0.05mol / L, and magnetically stirred to obtain Al 2 o 3 A homogeneous suspension of ceramic powder.

[0050] 1.7 g of oxalic acid was dissolved in 17 ml of absolute ethanol to obtain an oxalic acid ethanol solution with an oxalate ion concentration of 0.8 mol / L.

[0051] At room temperature, add the above-mentioned oxalic acid ethanol solution to the suspension, and maintain it for 40 minutes under mechanical stirring at a rotational speed of 500r / min. After the reaction is completed, centrifuge, wash with deionized water for 3 times, wash with absolute ethanol for 2 times, and dry , to obtain the coated ceramic particle precursor powder.

[0052] Put the obtained coated ceramic particle precursor powder into a tube furnace, feed a mixture ...

Embodiment 2

[0060] 6 g of cobalt chloride was dissolved in 42 ml of anhydrous ether to obtain a homogeneously dispersed lyosol.

[0061] Add 8.5g ZrO to the lyosol 2 Powder and 30ml concentration of 0.05mol / L valeric acid solution, magnetic stirring, to obtain ZrO 2 A homogeneous suspension of ceramic powder.

[0062] 4.7 g of sodium oxalate was dissolved in 44 ml of anhydrous ether to obtain an oxalate ether solution with an oxalate ion concentration of 0.8 mol / L.

[0063] At room temperature, add the above-mentioned ethyl oxalate solution into the suspension, and maintain it for 50 minutes under mechanical stirring at a speed of 500 r / min. After the reaction is completed, centrifuge, wash with deionized water for 3 times, wash with absolute ethanol for 2 times, and dry , to obtain the coated ceramic particle precursor powder.

[0064] Put the obtained coated ceramic particle precursor powder into a tube furnace, feed a mixture of hydrogen and argon as a reducing gas, and heat up to 5...

Embodiment 3

[0067] Dissolve 5.8 g of cobalt nitrate in 34 ml of anhydrous methanol to obtain a homogeneously dispersed lyosol.

[0068] 6.8 g of SiC powder and 18 ml of capric acid solution with a concentration of 0.05 mol / L were added to the lyosol, and magnetically stirred to obtain a homogeneously dispersed suspension of SiC ceramic powder.

[0069] 2.96g of sodium carbonate was dissolved in 35ml of anhydrous methanol to obtain a sodium carbonate methanol solution with a carbonate ion concentration of 0.8mol / L.

[0070] At normal temperature, the above-mentioned sodium carbonate methanol solution was added to the suspension, maintained at a speed of 500r / min under mechanical stirring for 50min, after the reaction was completed, centrifuged, washed 3 times with deionized water and 2 times with absolute ethanol, Dry to obtain the coated ceramic particle precursor powder.

[0071] The obtained coated ceramic particle precursor powder was put into a tube furnace, and a mixed gas of hydrog...

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Abstract

The invention discloses cobalt-coated ceramic composite powder. The cobalt-coated ceramic composite powder is prepared by the following steps: adding ceramic powder into cobalt-containing lyosol, carrying out stirring and foaming in the presence of a long-acting particle foam stabilizer to obtain a suspension in which ceramic foam stably exists, adding a precipitator into the suspension, carryingout gel reaction to obtain coated ceramic particle precursor powder, and reducing the coated ceramic particle precursor powder to obtain the cobalt-coated ceramic composite powder with a core-shell structure. The cobalt-coated ceramic composite powder is added into cobalt-chromium alloy powder, the cobalt-coated ceramic modified cobalt-based composite material for dentistry can be obtained and used for preparing a false tooth metal inner crown through selective laser melting forming, the coefficient of thermal expansion is low, and the cobalt-coated ceramic composite material is resistant to abrasion and good in tensile property.

Description

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Claims

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Application Information

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Owner ZHONGBEI UNIV
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