Preparation method of dark-blue zirconia ceramic

A technology of zirconia ceramics and dark blue, which is applied in the field of preparation of dark blue zirconia ceramics, which can solve the problems of poor high-temperature stability of pigments, rising production costs, and high requirements for sintering furnaces, achieving low cost, reducing costs, and ensuring mechanical properties Effect

Inactive Publication Date: 2013-11-06
无锡特科精细陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zirconia ceramic products for civilian use often require a good appearance, such as color, luster, etc., but naturally sintered zirconia products are ivory white, and a single color is difficult to meet people's growing demand for zirconia decorations. It is imperative to develop zirconia products of different colors
However, since the sintering temperature of zirconia materials used as structural ceramics is higher than 1400°C, and the high-temperature stability of pigments used as additives to change the color of zirconia is very poor, generally only stable coloring can be achieved below 1300°C. The sintering is dense at a temperature below 1300°C. Some people use hot-press sintering to prepare colored zirconia, but the zirconia prepared in this way has high requirements on the sintering furnace, and the production cost rises sharply, so it is not suitable for the relatively cheap civilian decoration market.

Method used

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  • Preparation method of dark-blue zirconia ceramic
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  • Preparation method of dark-blue zirconia ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 30 grams of polyvinyl butyral and dissolve it in 5000 grams of absolute alcohol, pour it into a 5L ball mill bottle after fully dissolving, add 1000 grams of yttrium oxide stabilized zirconia powder with a mole fraction of 3% (purity is 99%, average particle diameter 0.5 μm), weighed 20 grams of cobalt aluminate and 10 grams of cobalt oxide into the ball milling bottle at the same time, both cobalt aluminate and cobalt oxide were analytically pure, and 10 grams of polyethyleneimine was used as a dispersant. After ball milling for 24 hours, the suspended The turbid liquid was poured out, and after drying to remove the alcohol, the ceramic powder was ground and passed through a 500-mesh sieve, and then isostatically pressed to prepare a zirconia rod with a diameter of 20 mm and a length of 100 mm. After slow debinding, it is put into a high-temperature sintering furnace and sintered into products. The temperature rise curve during sintering is:

[0029]

[0030]...

Embodiment 2

[0033] Weigh 35 grams of polyvinyl butyral and dissolve it in 5500 grams of absolute alcohol, pour it into a 5L ball mill bottle after fully dissolving, add 1100 grams of yttrium oxide stabilized zirconia powder with a mole fraction of 4% (purity is 99%, average particle diameter 0.8μm), weighed 22 grams of cobalt aluminate and 12 grams of cobalt oxide and added them to the ball mill bottle at the same time. Both cobalt aluminate and cobalt oxide were of analytical grade, and 11 grams of polyethyleneimine was used as a dispersant. After ball milling for 24 hours, the suspended The turbid liquid was poured out, and after drying to remove the alcohol, the ceramic powder was ground and passed through a 500-mesh sieve, and then isostatically pressed to prepare a zirconia rod with a diameter of 20 mm and a length of 100 mm. After slow debinding, it is put into a high-temperature sintering furnace and sintered into finished products. The temperature rise curve during sintering is: ...

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Abstract

The invention provides a preparation method of dark-blue zirconia ceramic. The method comprises following steps: step one, taking zirconia powder as the base material, adding at least one component from following components: cobalt ferrite, cobalt oxide and cobalt aluminate in the zirconia powder as the coloring agent, and adding polyvinyl alcohol water solution in the zirconia powder as the binder; step two, putting the mixture of the ceramic raw materials prepared in the step one into a ball-grinding bottle to grind until the mixture is homogenously mixed, pouring out the suspending liquid in the ball-grinding bottle, drying the suspending liquid to remove the water, and obtaining ceramic powder; step three, pressing the ceramic powder obtained in the step two into required ceramic bodies through the dry pressing technology or the isostatic pressing technology; step four, putting the ceramic bodies obtained in the step three into a high-temperature sintering furnace after slow glue discharging to sinter into products. The preparation method produces a dark-blue zirconia ceramic, and the ceramic contains a coloring material. The coloring material can stably exist at the temperature of 1500 DEG C, furthermore, the coloring material not only can guarantee that zirconia is sintered into a completely compact state, but also makes the zirconia ceramic have a dark-blue appearance.

Description

technical field [0001] The invention belongs to the technical field of oxide ceramics, and relates to a preparation method of ceramics, in particular to a preparation method of dark blue zirconia ceramics. Background technique [0002] Partially stabilized tetragonal zirconia ceramics (3Y-TZP) with a mole fraction of 3% yttria is a very important structural ceramic material. It has very excellent mechanical properties, with a bending strength as high as 1000MPa and a fracture toughness as high as 10MPa m1 / 2, has the reputation of ceramic steel, so it has more and more important applications in industrial machinery and daily life. Zirconia ceramic products for civilian use often require a good appearance, such as color, luster, etc., but naturally sintered zirconia products are ivory white, and a single color is difficult to meet people's growing demand for zirconia decorations. It is imperative to develop zirconia products of different colors. However, since the sintering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 刘名剑王征
Owner 无锡特科精细陶瓷有限公司
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