Lanthanum aluminate green ceramic as well as preparation method and application thereof

A technology of lanthanum aluminate and ceramics, which is applied in the field of ceramics, can solve the problems of limitations, failure to meet the requirements of practical application, and great difference in emerald green color, etc., and achieve the effect of high hardness, high toughness, and bright color

Active Publication Date: 2021-04-16
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In 2003, Rolex released the 50th anniversary model of the Submariner series, the green water ghost bezel. In 2010, Rolex replaced the green water ghost with a new green ceramic bezel, which not only improved the appearance of the watch, but was exclusively fired by Rolex. The color of the dark green ceramic bezel is extremely bright and gorgeous, and the green ceramics are vividly displayed. Therefore, green ceramics have been sought after by people, but Rolex has not announced the formula of its green ceramics, which limits the production of green ceramics in my country. Affected the development of my country's ceramic industry
[0003] The current green ceramics are mainly zirconia compounded with nickel oxide and chromium oxide. Nickel oxide is light green in zirconia, and zirconia doped with chromium oxide is dark green. Although it has similar mechanical properties to zirconia, its color They are all far from emerald green, and cannot meet the practical requirements on the market

Method used

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  • Lanthanum aluminate green ceramic as well as preparation method and application thereof
  • Lanthanum aluminate green ceramic as well as preparation method and application thereof
  • Lanthanum aluminate green ceramic as well as preparation method and application thereof

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preparation example Construction

[0026] The present invention provides a preparation method of lanthanum aluminate green ceramics described in the above technical solution, comprising the following steps:

[0027] Aluminum hydroxide, lanthanum oxide, nickel oxide, chromium oxide and titanium oxide are mixed and wet ground to obtain a slurry; the amount of aluminum hydroxide, lanthanum oxide, nickel oxide, chromium oxide and titanium oxide meets the requirements of the above technical scheme LaAl 11-2X- Y Cr Y Ni X Ti X o 18 stoichiometric ratio;

[0028] Drying and calcining the slurry in sequence to obtain a powder material;

[0029] Pressing the powder material to obtain a ceramic green body;

[0030] The ceramic body is sintered to obtain lanthanum aluminate green ceramics.

[0031] The preparation method provided by the invention is environmentally friendly, pollution-free, less energy consumption, low cost price, short production cycle, simple and controllable, and good repeatability.

[0032] I...

Embodiment 1

[0044] Preparation chemical composition is LaAl 11-2X-Y Cr Y Ni X Ti X o 18 Lanthanum aluminate green ceramics, where X = 1.5, Y = 0.2. Accurately weigh aluminum hydroxide, lanthanum oxide, nickel oxide, chromium oxide and titanium oxide according to the stoichiometric ratio of the above-mentioned X and Y;

[0045] Move the weighed solid raw material into a ball milling tank, pour in absolute ethanol three times the mass of the solid raw material, place the ball milling tank in a star-shaped ball mill, and add oxidized powder with a particle size of 5mm and 10mm according to a ball-to-material ratio of 2:1. Zirconium balls were ball milled for 24 hours at a speed of 4800r / min to obtain a slurry;

[0046] Pour the slurry into a beaker, place it in an oven at a temperature of 80°C to dry, put the dried powder into a box-type electronic furnace, and calcinate it at 600°C for 4 hours to obtain a powder material;

[0047] The powder material is ground and sieved, and pressed ...

Embodiment 2

[0050] Preparation chemical composition is LaAl 11-2X-Y Cr Y Ni X Ti X o 18 Lanthanum aluminate green ceramics, where X=2.0, Y=0.3. Accurately weigh aluminum hydroxide, lanthanum oxide, nickel oxide, chromium oxide and titanium oxide according to the stoichiometric ratio of the above-mentioned X and Y;

[0051] Move the weighed solid raw material into a ball milling tank, pour in absolute ethanol three times the mass of the solid raw material, place the ball milling tank in a star-shaped ball mill, and add oxidizing powder with a particle size of 5 mm and 10 mm according to a ball-to-material ratio of 3:1. Zirconium balls were ball milled for 48 hours at a speed of 4800r / min to obtain a slurry;

[0052] Pour the slurry into a beaker, place it in an oven with a temperature of 80°C to dry, put the dried powder into a box-type electronic furnace, and calcinate it at 700°C for 6 hours to obtain a powder material;

[0053] The powder material is ground and sieved, and pressed...

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Abstract

The invention provides lanthanum aluminate green ceramic as well as a preparation method and application thereof, and relates to the technical field of ceramic. The chemical component of the lanthanum aluminate green ceramic provided by the invention is LaAl < 11-2X-YNi < X > Cr < Y > Ti < X > O < 18 >, X is equal to 1.5-5.0, and Y is equal to 0.0-2.0. The lanthanum aluminate ceramic provided by the invention is green and bright in color, and has relatively high hardness, toughness and color saturation.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a lanthanum aluminate green ceramic and its preparation method and application. Background technique [0002] In 2003, Rolex released the 50th anniversary model of the Submariner series, the green water ghost bezel. In 2010, Rolex replaced the green water ghost with a new green ceramic bezel, which not only improved the appearance of the watch, but was exclusively fired by Rolex. The color of the dark green ceramic bezel is extremely bright and gorgeous, and the green ceramics are vividly displayed. Therefore, green ceramics have been sought after by people, but Rolex has not announced the formula of its green ceramics, which limits the production of green ceramics in my country. Affected the development of my country's ceramic industry. Therefore, it is particularly important to find an environmentally friendly, pollution-free, low energy consumption, low cost price, short produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622
Inventor 王青春宋希文包金小张永和谢敏周芬郜健全徐鹏飞阮飞
Owner INNER MONGOLIA UNIV OF SCI & TECH
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