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Green zirconia ceramics and preparation method thereof

A technology of zirconia ceramics and zirconia, which is applied in the field of ceramic material preparation, can solve the problem of single green color of zirconia ceramics coloring method, and achieve the effect of excellent mixing effect, uniform mixing and simple process

Pending Publication Date: 2019-07-12
WANHUA CHEM (SICHUAN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of existing zirconia ceramic coloring methods and single green color, the present invention proposes a green zirconia ceramic and its preparation method

Method used

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  • Green zirconia ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Preparation of zirconium hydroxide precursor slurry: mix 0.1M zirconium oxychloride and 0.006M yttrium chloride solution, add ammonia water (concentration 1mol / L) to adjust pH=8, stir and age at 200rpm for 0.5 hours. Pour the aged reaction emulsion into a Buchner funnel for suction filtration, wash with deionized water until the washing filtrate reacts with 0.1 mol / L silver nitrate solution and does not become turbid. The filter cake was taken out, stirred by adding water at 300 rpm, and dispersed into a zirconium hydroxide precursor slurry (wherein the content of zirconium hydroxide was 5 wt%).

[0042] 2) Add ammonium metavanadate (5.22mmol / L), cobalt nitrate (0.3mmol / L), and aluminum nitrate (0.6mmol / L) to the zirconium hydroxide precursor slurry, stir evenly, and spray the slurry to dry, The drying inlet temperature is 200°C to obtain zirconium hydroxide powder.

[0043] 3) Zirconium hydroxide powder was calcined at 800°C for 1 hour to obtain zirconia powder con...

Embodiment 2

[0046] 1) Prepare the zirconium hydroxide precursor slurry, mix 1M zirconium oxychloride and 0.06M yttrium chloride solution, add ammonia water (concentration 7mol / L) to adjust the pH=9, stir and age at 200rpm for 2 hours. Pour the aged reaction emulsion into a Buchner funnel for suction filtration, wash with deionized water until the washing filtrate reacts with 0.1 mol / L silver nitrate solution and does not become turbid. Take out the filter cake, add water at 300 rpm and stir to disperse into zirconium hydroxide precursor slurry (the content of zirconium hydroxide is 8wt%).

[0047] 2) Add quantitative ammonium metavanadate (11.6mmol / L), cobalt nitrate (6mmol / L), aluminum nitrate (1.2mmol / L) to the zirconium hydroxide precursor slurry, stir evenly, and spray dry the slurry , the drying inlet temperature is 250°C to obtain zirconium hydroxide powder.

[0048] 3) Zirconium hydroxide powder was calcined at 900°C for 2 hours to obtain zirconia powder containing colorant. The c...

Embodiment 3

[0051] 1) Preparation of zirconium hydroxide precursor slurry: prepare 1.5M zirconium oxychloride and 0.24M yttrium chloride solution, add ammonia water (concentration 14mol / L) to adjust pH=10, stir and age at 200rpm for 6 hours. Pour the aged reaction emulsion into a Buchner funnel for suction filtration, wash with deionized water until the washing filtrate reacts with 0.1 mol / L silver nitrate solution and does not become turbid. Take out the filter cake, add water at 300rpm and stir to disperse into zirconium hydroxide precursor slurry (wherein the content of zirconium hydroxide is 10wt%).

[0052] 2) Add sodium metavanadate (6.1mmol / L), cobalt chloride (28.3mmol / L), aluminum chloride (56.5mmol / L) to the zirconium hydroxide precursor slurry, stir evenly, and spray the slurry Dry, and the drying inlet temperature is 300°C to obtain zirconium hydroxide powder.

[0053] 3) Zirconium hydroxide powder was calcined at 1100°C for 4 hours to obtain zirconia powder containing colora...

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Abstract

The invention discloses green zirconia ceramics and a preparation method thereof, and belongs to the field of ceramic materials. The preparation method comprises the following steps: firstly preparinga zirconium hydroxide precursor by a coprecipitation technology, then adding metal salts of vanadium, cobalt and aluminum into the precursor, drying and sintering to prepare zirconia granulated powder containing vanadium pentoxide and cobalt aluminate, and molding and sintering the powder to prepare the green zirconia ceramics. By adjusting content and proportion of a colouring agent (vanadium pentoxide and cobalt aluminate) in the zirconia powder, the green chroma of the zirconia ceramics can be adjusted. According to the invention, the problem that a pigment cannot reach the uniform dispersion state of grain size due to existing physical pigment mixing methods and the problem that the coprecipitation addition mode of a colouring agent easily leads to incomplete precipitation of metal salts are solved.

Description

technical field [0001] The invention relates to a simple coloring method for zirconia ceramics, which is used for preparing green zirconia ceramics, and belongs to the field of ceramic material preparation. Background technique [0002] Due to the advantages of high melting point, high boiling point, high strength, high temperature resistance, good wear resistance and excellent corrosion resistance, zirconia materials are widely used in structural ceramics (such as bearings, valves, knives and abrasive materials, etc.), functional ceramics (such as oxygen sensors, solid oxide fuel cells, mobile phone back shells and dentures, etc.), super-toughened ceramics, and zirconium-cerium eutectics and other fields. With the advent of the 5G communication era, limited by the wavelength of 5G communication, the use of traditional metal materials in 3C appearance parts is limited, while the application of colored zirconia ceramic materials in the 3C field is gradually increasing. [00...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622C04B35/626
CPCC04B35/48C04B35/622C04B35/62605C04B2235/3222C04B2235/3239C04B2235/3275C04B2235/443C04B2235/444C04B2235/96C04B2235/9661
Inventor 陈潇吴桢黎源孙家宽
Owner WANHUA CHEM (SICHUAN) CO LTD
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