A kind of preparation method of sky blue zirconia ceramics
A zirconia ceramic and sky blue technology, which is applied in the field of preparation of sky blue zirconia ceramics, can solve the problems of high energy consumption, high requirements on mold materials, rising production costs, etc., and achieves a simple and easy-to-use preparation process and low manufacturing process cost. , the effect of reducing costs
Active Publication Date: 2017-05-10
DONGGUAN HUAJING POWDER METALLURGY
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Problems solved by technology
However, adopting this method to prepare colored zirconia ceramics has high requirements on the performance of the sintering furnace, and the hot-pressing sintering process and equipment are complicated, the production control requirements are very strict, the mold material requirements are high, the energy consumption is large, and the production efficiency is low, which leads to production failure. The cost has risen sharply, so this method is not suitable for the relatively cheap civilian ceramic decoration market
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[0036] Weigh 20 grams of polyvinyl alcohol and dissolve it in 1000 grams of water, pour it into a 5L ball mill jar after fully dissolving, add 1000 grams of yttria-containing stabilized tetragonal zirconia powder (purity is 99%, average particle size is 0.5 μm) and 20 gram of neodymium oxide, after ball milling for 24 hours, pour out the suspension, dry and remove the moisture, grind the ceramic powder and pass through a 500-mesh sieve, and dry press and cold isostatic press to prepare a product with a diameter of 28 mm and a thickness of 8 mm zirconia round cake. Then put it into a high-temperature sintering furnace to remove the glue and sinter it into a sky-blue zirconia ceramic product.
[0037] The debinding and sintering integrated process segment can be expressed as:
[0038]
[0039] The fired zirconia ceramic products are tested experimentally, among which, the Archimedes principle is used to detect the density, the microhardness tester is used to test the Vickers...
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Abstract
The invention discloses a preparation method of sky-blue zirconia ceramic. The preparation method comprises the following steps: adding neodymium oxide powder to zirconia powder which serves as a ceramic matrix material as a coloring agent; adding a binder and forming a mixture; preparing a ceramic body from the mixture; and carrying out multi-stage sintering treatment on the ceramic body to obtain a sky-blue zirconia ceramic product, wherein the multi-stage sintering treatment at least comprises the following steps: firstly, sintering at the temperature range of room temperature to 600 DEG C for 7-9 hour, sintering at 600-1200 DEG C for 4-8 hours, and then sintering at 1200-1500 DEG C for 6-8 hours. According to the preparation method of the sky-blue zirconia ceramic, zirconia can be stably colorized into sky blue by a pigment at a high temperature under the premise of ensuring fully dense sintering of the zirconia; and meanwhile, relatively low preparation cost is kept.
Description
technical field [0001] The invention relates to a preparation method of sky blue zirconia ceramics. Background technique [0002] Zirconia ceramic is a very important structural ceramic material. It has very excellent mechanical properties, with a bending strength of up to 1000MPa and a fracture toughness of up to 10MPa m1 / 2. It has the reputation of ceramic steel, so it is widely used in industrial machinery and daily life. have more and more widespread applications. [0003] Zirconia ceramic products for civilian use often require beautiful appearance, such as color, luster, etc.; but the ceramic products sintered from pure zirconia powder are white, and a single color is difficult to meet people's growing demand for zirconia ceramic decorations. Therefore, it is imperative to develop zirconia ceramic products of different colors. [0004] However, since the sintering temperature of zirconia materials used as structural ceramics is generally higher than 1400°C, and the h...
Claims
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IPC IPC(8): C04B35/48C04B35/64C04B35/622
Inventor 钟辉
Owner DONGGUAN HUAJING POWDER METALLURGY