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A kind of zirconia ceramic and its preparation method

A technology of zirconia ceramics and neodymium oxide, which is applied to the field of colored zirconia ceramics and their preparation, can solve the problem that the zirconia ceramics cannot show purple, and achieve the effects of stable color rendering, pure and beautiful color, and simple and easy preparation method.

Active Publication Date: 2011-11-30
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, adding the purple pigment to zirconia ceramics does not make zirconia ceramics purple.

Method used

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  • A kind of zirconia ceramic and its preparation method

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[0025] The preparation method of purple zirconia ceramics of the present invention, it comprises the steps:

[0026] (1) Neodymium oxide pretreatment: adding neodymium oxide particles into diethanolamine solution for soaking, and then separating the solid and liquid;

[0027] (2) Compression molding sintering: the base material, sintering aids, additives, and neodymium oxide particles pretreated in step (1) are ball milled and mixed, then molded and sintered at high temperature.

[0028] The average particle diameter of the neodymium oxide particles of the present invention is preferably 0.1 to 20 μm, more preferably 1 to 10 μm.

[0029] Wherein, the present invention does not have too many restrictions on the amount of the diethanolamine solution, as long as it can completely submerge the neodymium oxide. In the present invention, the dosage of the diethanolamine solution per gram of neodymium oxide is preferably 10-40 mL.

[0030] Preferably, the concentration of the dieth...

Embodiment 1

[0043] Substrate: 88 g of semi-stabilized yttria-stabilized zirconia, wherein the mole fraction of yttria is 3%.

[0044] Sintering aids: 0.6g magnesium oxide, 0.8g silicon oxide, 0.6g aluminum oxide

[0045] Neodymium oxide: 8 g of neodymium oxide with an average particle size of 5 μm

[0046] Additives: 0.4g zinc oxide, 0.8g barium carbonate, 0.8g calcium fluoride

[0047] (1) Pretreatment: First, add neodymium oxide particles into 240ml of 3mol / L diethanolamine solution, and stir for 1 hour at 200rad / min. Then the neodymium oxide particles were filtered out from the diethanolamine solution and dried at 100°C for 0.5h.

[0048] (2) Molding sintering: Add the matrix, sintering aids, neodymium oxide obtained in step (1) and additives into 200 mL of absolute ethanol, and then ball mill and mix for 6 hours. After taking it out, place it in an oven at 100°C for 6 hours. The obtained powder was crushed with a porcelain mortar and passed through a 200-mesh sieve. Use a four-co...

Embodiment 2

[0050] Substrate: 94 g of semi-stabilized yttria-stabilized zirconia, wherein the mole fraction of yttria is 3.5%.

[0051] Sintering aids: 0.5g magnesium oxide, 0.5g calcium oxide

[0052] Neodymium oxide: 3 g of neodymium oxide with an average particle size of 1 μm

[0053] Additives: 0.4g zinc oxide, 0.8g barium carbonate, 0.8g calcium fluoride

[0054](1) Pretreatment: First, add neodymium oxide particles into 90ml of 3mol / L diethanolamine solution, and stir for 1h at a speed of 200rad / min. Then the neodymium oxide particles were filtered out from the diethanolamine solution and dried at 100°C for 0.5h.

[0055] (2) Molding and sintering: Add the matrix, sintering aids, neodymium oxide obtained in step (1) and additives into 200 mL of absolute ethanol, and then ball mill and mix for 6 hours. After taking it out, place it in an oven at 100°C for 6 hours. The obtained powder was crushed with a porcelain mortar and passed through a 200-mesh sieve. Use a four-column press...

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Abstract

The invention, belonging to the technical field of zirconia ceramic, discloses a zirconia ceramic and a preparation method thereof. The ceramic comprises matrix, sintering aid, neodymium oxide and additive, wherein, the matrix is yttria stabilized zirconia, the additive is selected from one or more of zinc oxide, barium carbonate and calcium fluoride, and the diffraction peak of the XRD appears when the 2 theta is 34.8-36.2 degrees. The zirconia ceramic has stable and beautiful purple. The preparation method comprises the following steps: adding neodymium oxide particles in a diethanolamine solution for soaking, then carrying out solid-liquid separation; carrying out ball mill mixing of the matrix, processed neodymium oxide particles, sintering aid and additive, then carrying out die forming and high temperature sintering. The preparation method provided by the present invention is simple and easy, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of zirconia ceramics, in particular to a colored zirconia ceramic and a preparation method thereof. Background technique [0002] Zirconia ceramics have the characteristics of high strength, high hardness, good toughness, corrosion resistance, high temperature resistance, and good formability, and are widely used in various fields, such as cutting tools, molds, valves, refractory materials, oxygen sensors, solid fuel cells, etc. [0003] In recent years, with the continuous improvement of people's demand for decorations, colored zirconia ceramics have become the new favorite of high-end decorative materials due to their excellent mechanical properties, bright colors, metallic luster and non-allergic effects, such as mobile phones, watch chains, bracelet etc. However, at present, zirconia ceramics are only available in black and white. [0004] Some literature pointed out that blue and yellow zirconia ceram...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 舒剑周勇刘新阳
Owner HUAWEI TEHCHNOLOGIES CO LTD
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