Ytterbium oxide and yttrium oxide co-stabilized zirconia ceramic material and its prepn process

A technology of zirconia ceramics and ceramic materials, applied in tetragonal zirconia polycrystalline and fully stabilized zirconia ceramics and their preparation, zirconia-based ceramic products and their preparation, can solve problems affecting mechanical properties and TZP ceramics cannot be obtained, and achieve Avoid hard agglomeration, avoid powder particle growth, and reduce the effect of dosage

Inactive Publication Date: 2007-11-07
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing Y 2 o 3 The content usually causes a phase change during cooling and cannot obtain TZP ceramics; increase Y 2 o 3 The content will affect its mechanical properties to a certain extent
It can be seen that only using Y 2 o 3 As a stabilizer, the TZP ceramic material has certain limitations in its mechanical properties

Method used

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  • Ytterbium oxide and yttrium oxide co-stabilized zirconia ceramic material and its prepn process
  • Ytterbium oxide and yttrium oxide co-stabilized zirconia ceramic material and its prepn process
  • Ytterbium oxide and yttrium oxide co-stabilized zirconia ceramic material and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 uses ytterbium oxide (Yb) with a purity of not less than 99.9% 2 o 3 ), yttrium oxide (Y 2 o 3 ) and monoclinic zirconia powder (average grain size less than 100 nanometers) as raw materials, the design finally obtains ytterbium oxide (Yb 2 o 3 ) molar percentage is 1.0%, yttrium oxide (Y 2 o 3 ) molar percentage is 1.0%. Select an appropriate amount of corresponding compounds according to the above-mentioned composition ratio, and ytterbium oxide (Yb 2 o 3 ) and yttrium oxide (Y 2 o 3 ) was dissolved in an appropriate amount of nitric acid to obtain a clear solution, and Y-TZP balls were used as the ball milling medium, mixed with monoclinic zirconia powder with an average grain size less than 100 nanometers in absolute ethanol and ball milled for 24 hours. After ball milling, the suspension was dried with a rotary evaporator to obtain a precursor that encapsulates the powder. The precursor was calcined in air at 300°C for 1 hour to obtain zirconia...

Embodiment 2

[0024] Embodiment 2 design finally obtains ZrO 2 Ytterbium oxide (Yb) in ceramics 2 o 3 ) molar percentage is 2.0%, yttrium oxide (Y 2 o 3 ) molar percentage is 1.0%, the powder is synthesized according to the method of Example 1, ceramics are prepared, and the sintering time is 1 hour.

[0025] Prepared ZrO 2 The mechanical properties of ceramics are shown in Fig. 3.

Embodiment 3

[0026] Embodiment 3 design finally obtains ZrO 2 Ytterbium oxide (Yb) in ceramics 2 o 3 ) molar percentage is 3.0%, yttrium oxide (Y 2 o 3 ) molar percentage is 1.0%, the powder is synthesized according to the method of Example 1, ceramics are prepared, and the sintering time is 1 hour.

[0027] Prepared ZrO 2 The mechanical properties of the ceramics are shown in Fig. 3 respectively.

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Abstract

The present invention features that two kinds of oxide, including ytterbium oxide and yttrium oxide, are used as the stabilizers simultaneously to coat nanometer zirconia powder and the obtained powder is sintered in the air and without pressure to obtain tetragonal zirconia polycrystal (TZP) and fully stabilized zirconia ceramic (FSZ) with low stabilizer content. The material includes Yb2O3, Y2O3 and monoclinic zirconia powder in purity over 99.9 wt%. The produced TZP ceramic contains Yb2O3 in 1.0-2.0 mol% and Y2O3 in 1.0-2.0 mol%, and the produced FSZ ceramic contains Yb2O3 in 3.0-4.0 mol% and Y2O3 in 1.0-2.0 mol%.

Description

technical field [0001] The invention relates to tetragonal zirconia polycrystal (TZP) and fully stabilized zirconia ceramic (FSZ) co-stabilized by ytterbium oxide and yttrium oxide and a preparation method. More precisely, it provides an ytterbium oxide (Yb 2 o 3 ), yttrium oxide (Y 2 o 3 ) and monoclinic zirconia powder as raw materials, the powder is prepared by encapsulation technology, and at low stabilizer content, the densification is achieved through pressureless sintering to obtain TZP ceramics with excellent mechanical properties and fully stabilized zirconia ceramics with electrical properties ( FSZ) and a preparation method thereof, which belong to the field of zirconia-based ceramic products and preparation methods. Background technique [0002] Zirconia is a versatile ceramic material, which can be divided into tetragonal zirconia polycrystalline ceramics (TZP), partially stabilized zirconia ceramics (PSZ) and fully stabilized zirconia ceramics (FSZ) accordi...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor阚艳梅王佩玲约瑟夫·务伦杰奥默·范德比斯特
OwnerSHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI