Blue rare earth zirconium ceramic powder as well as manufacture and application thereof

Abstract

The invention relates to blue rare earth zirconium ceramic powder as well as manufacture and application of the blue rare earth zirconium ceramic powder. The blue rare earth zirconium ceramic powder is prepared by ball-milling CoAl2O4, rare earth oxide, Al2O3, ZrO2, rare earth zirconium ceramic powder, rare earth zirconium ceramic precursor, rare earth zirconium ceramic intermediate, water and other materials to obtain slurry, then adding PVA (Polyvinyl Alcohol), CMC (Carboxymethyl Cellulose) and other adhesives and dispersants, and uniformly mixing so as to obtain the blue rare earth zirconium structural ceramic powder, which has blue appearance and is composed of the following components in parts by dry weight: 0.1-10 parts of CoAl2O4, 3.0-8.0 parts of Y2O3, 0.01-3 parts of Gd2O3, 0-3parts of La2O3, 0-3 parts of CeO2, 0-0.1 parts of Pr6O11, 0-0.1 parts of Nd2O3, 0-0.1 parts of Tb4O7, 0-3 parts of Al2O3 and 70-95 parts of ZrO2 based on oxide, 0-20 parts of adhesive and 0-2 parts of dispersant. The blue rare earth zirconium structural ceramic powder is shaped, fired, machined and polished to prepare a blue rare earth zirconium structural ceramic product. According to the invention, the variety of classic blue zirconium ceramic products is increased, the blue zirconium ceramic products are accepted by people due to bright color and use safety characteristics, the quality of life is improved, the aging resistance and other performances of the zirconium ceramic products are enhanced, and the rare earth application field is enlarged.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a colored ceramic material and a preparation method thereof. Background technique [0002] Rare earth zirconium structure ceramic materials have the advantages of high hardness, high strength, good toughness, strong wear resistance and scratch resistance, and are widely used in high-precision, high wear-resistant, high-reliability mechanical parts or electronic components Industry, aerospace, optoelectronic communication, military high-end products and other high-tech fields. Because it also has the characteristics of density, texture and hardness similar to natural gemstones, it has become a new favorite material in high-end civil fields such as ceramic watch accessories, various decorations and ceramic knives. However, since the rare earth zirconium structure ceramic material itself is white and has a single tone, it cannot meet the requirements of various high-end products in various civ...

AI Technical Summary

Problems solved by technology

However, since the rare earth zirconium structure ceramic material itself is white and has a single color tone, it cannot meet the requirements of various high-end products in various civilian fields, so colored rare earth zirconium structure ceramics have become the focus of research and development for its wide application in the civilian field.

[0003] Publication No. 101475374 of the Chinese patent "A preparation method of powder blue zirconia ceramics and the prepared product" discloses a powder blue zirconia ceramic, which uses cobalt oxide, Silicon, alumina, vanadium pentoxide, magnesium oxide, through ball milling, drying, sieving, mixing, injection, solvent degreasing, thermal degreasing, firing, rough processing, finishing, polishing to prepare powdery blue zirconia ceramics and products, but due to the addition of more silicon dioxide, vanadium pentoxide and magnesium oxide, these oxides generate a liquid phase at a relatively low temperature during the sintering stage of zirconia, and aggregate to form a molten pool, cooling When the crystal size of the precipitated oxide grows abnormally, or it is preserved in the glass phase at the grain boundary of zirconia, these abnormally grown crystals and glass phase seriously reduce the toughness, strength and hardness of the material; and part of the added cobalt oxide cannot Enter the zirconia crystal lattice, precipitate or form a glass phase at the grain boundary, on the one hand, reduce the physical properties of zirconia ceramics, on the other hand, there are safety hazards that heavy metal elements are easy to dissolve when used; the aforementioned powder blue zirconia and the current No gadolinium element is added to commercially available zirconia products. As time increases, the flexural strength and fracture toughness of zirconia products decrease to varying degrees, and their anti-aging performance is low.

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