Black zirconia ceramic material composition and application thereof

Abstract

The invention discloses a black zirconia ceramic material composition which comprises the following components in percentage by mass: 0.01-4% of ferric oxide, 0.01-3.5% of aluminum oxide, 0-3.5% of zinc oxide, 2-7% of yttrium oxide, 0-4% of titanium oxide, 0.01-1.0% of silicon dioxide and the balance of zirconia with hafnium oxide. Due to addition of a black coloring agent in zirconia ceramic powder, the granularities of the silicon dioxide and the aluminum oxide are controlled, the shielding property and the blackness of a zirconia ceramic are improved, the light permeability of the zirconiaceramic is degraded, the mechanical strength of a molded ceramic is improved, and excellent effects of colors and strength of a product can be ensured. Meanwhile, the invention further discloses a black zirconia ceramic prepared from the black zirconia ceramic material composition, and a preparation method of a black zirconia ceramic.

Description

technical field [0001] The invention relates to a ceramic material powder and its application, in particular to a black zirconia ceramic material composition and its application. Background technique [0002] Due to its excellent mechanical, thermal and electrical properties, zirconium dioxide is widely used in structural materials, optical components, oxygen sensitive components and fuel cells. In recent years, with the rapid development of people's demand for decorations, black zirconia ceramics have become a new favorite material for high-end decorations due to their excellent mechanical properties, bright colors, metallic luster and non-allergic effects. , mobile phone casings, etc. have broad market prospects. However, black zirconia ceramics produced by ordinary processes have disadvantages such as high brittleness, low strength, poor color uniformity, insufficient blackness, good light transmission, and insufficient color hiding power, which cannot meet the requireme...

AI Technical Summary

Problems solved by technology

In terms of strength, the existing technical solutions generally directly ball mill zirconia and other additives to prepare slurry, and do not analyze the amount and particle size of silica in detail, resulting in unsatisfactory strength and brittleness of the molded porcelain body

[0004] When using a vacuum furnace, reducing atmosphere furnace or inert atmosphere furnace, it is necessary to sinter zirconia into porcelain in the air, and then blacken it in the above-mentioned sintering furnace, which greatly increases the cost of the production process. The products in the blackening process are prone to color difference due to the unevenness of the color center, resulting in a series of problems such as insufficient blackness of the product

However, when zirconia is doped with iron, cobalt, nickel and other pigment oxides, due to the inconsistent absorption wavelength of each oxide, it is easy to cause black and not black, and the color of the product appears reddish, bluish, greenish, etc.

And the added oxides are easy to react with yttrium and zirconium, destroying the stability of zirconia, and easily causing phase change and cracking of the product

In the preparation process, the requirements on the amount of colorant addition and temperature are relatively strict. Once the control is not good, problems such as color differences between batches are prone to occur.

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