Molandy green zirconia ceramic and preparation method thereof

A zirconia ceramic, Morandi's technology, applied in the field of ceramics, can solve problems such as zirconia ceramics that are difficult to meet, and achieve the effects of excellent mechanical properties, high production efficiency, and uniform color distribution

Active Publication Date: 2022-04-29
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ceramics sintered from pure zirconia powder are white, which is difficult to meet people's demand for zirconia ceramics as decorations, so it is imperative to develop colored zirconia ceramics

Method used

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  • Molandy green zirconia ceramic and preparation method thereof
  • Molandy green zirconia ceramic and preparation method thereof
  • Molandy green zirconia ceramic and preparation method thereof

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preparation example Construction

[0024] The invention provides a method for preparing Morandi green zirconia ceramics, comprising the following steps:

[0025] 1) ball milling zirconia, nickel titanate, neodymium zirconate and ball milling media to obtain ball milling slurry;

[0026] 2) Drying, grinding, sieving and molding the ball mill slurry in sequence to obtain a ceramic green body;

[0027] 3) Sintering the ceramic green body to obtain Morandi green zirconia ceramics.

[0028] In the present invention, the zirconia in step 1) is yttria-stabilized zirconia powder, and the molar ratio of yttrium oxide to yttria-stabilized zirconia powder is 2.5 to 3.5:100, preferably 3:100; The purity of zirconium powder is 90-99.9%, preferably 93-99.9%, more preferably 95-99.9%.

[0029] In the present invention, the mass ratio of zirconium oxide, nickel titanate and neodymium zirconate in step 1) is 950~990:5~40:5~40, preferably 960~980:10~35:10~35, further Preferably it is 965-975: 20-25: 20-25, and more preferably...

Embodiment 1

[0041] Mix 950g of yttria-stabilized zirconia powder with a purity of 92% and 3mol% yttrium oxide, 10g of nickel titanate, 40g of neodymium zirconate and 1000g of absolute ethanol, and use zirconia balls as grinding balls in a planetary ball mill. The material ratio was 1.6:1, ball milled for 28 hours under the condition of rotating speed of 400r / min, and a slurry with a particle size of 160μm was obtained.

[0042] The slurry was dried at 80°C for 12 hours, then ground through an 80-mesh standard sieve, dry-pressed under a pressure of 4 MPa for 60 s, and then cold isostatically pressed under a pressure of 200 MPa for 80 s to obtain a ceramic body.

[0043] The ceramic body was sintered at 1450°C for 2 hours to obtain Morandi green zirconia ceramics.

Embodiment 2

[0045] Mix 950g of yttria-stabilized zirconia powder with a purity of 90% and 2.5mol% yttrium oxide, 40g of nickel titanate, 10g of neodymium zirconate and 2000g of absolute ethanol, and use zirconia balls as grinding balls in a planetary ball mill. The ball-to-material ratio was 2.4:1, and ball milling was performed for 26 hours at a rotational speed of 420 r / min to obtain a slurry with a particle size of 175 μm.

[0046] The slurry was dried at 85°C for 10 h, then ground through an 80-mesh standard sieve, dry-pressed at 12 MPa for 50 s, and then cold isostatically pressed at 240 MPa for 50 s to obtain a ceramic body.

[0047] The ceramic body was sintered at 1480°C for 3 hours to obtain Morandi green zirconia ceramics.

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Abstract

The invention belongs to the technical field of ceramics. The invention provides a Molandy green zirconia ceramic and a preparation method thereof. The preparation method comprises the following steps: carrying out ball milling on zirconium oxide, nickel titanate, neodymium zirconate and a ball milling medium to obtain ball-milled slurry; sequentially drying, grinding, sieving and forming the ball-milled slurry to obtain a ceramic body; and sintering the ceramic green body to obtain the Molandy green zirconia ceramic. According to the Molandy green zirconia ceramic prepared by a high-temperature solid-phase method, the pigment can be stably colored on the premise of ensuring complete compactness of sintering; meanwhile, the preparation method is safe, free of pollution, low in energy consumption and high in production efficiency. The Molandy green zirconia ceramic has a single tetragonal phase structure, the brightness value is 60-70 cd / m < 2 >, the color distribution is uniform, the hardness can reach 10.0-11.02 GPa, the toughness can reach 9.6-13.2 MPa.m < 1 / 2 >, and the mechanical property is excellent.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a Morandi green zirconia ceramic and a preparation method thereof. Background technique [0002] Due to the advantages of good chemical stability, low thermal conductivity, low high temperature creep and good wear resistance, zirconia ceramics have been widely studied and applied in scientific research and industrial production. For example, ceramic coatings, refractory products, high-grade ceramic glazes, mobile phone backplanes, dental ceramics, and jewelry industries. [0003] With the improvement of human production and living standards, more and more attention has been paid to the appearance and performance of articles that are closely related to people's daily life. Therefore, having a beautiful appearance and excellent performance has become an important indicator of product quality. However, ceramics sintered from pure zirconia powder are white, which is difficult to m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622
CPCC04B35/49C04B35/622C04B2235/3246C04B2235/9646C04B2235/96
Inventor 包金小温强强王青春张永和阮飞马雨威谢敏周芬郜建全
Owner INNER MONGOLIA UNIV OF SCI & TECH
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