Neodymia and yttrium oxide co-stabilized cubic zirconia polycrystalline ceramic and its preparation method

A technology of tetragonal zirconia and polycrystalline ceramics, which is applied in the field of zirconia-based ceramics and achieves the effects of simple synthesis process, excellent mechanical properties and favorable densification.

Inactive Publication Date: 2006-04-19
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

Although the effect of adding other stabilizers on the properties of Y-TZP ceramics is complicated, and excellent performance cannot always be obtained, but through the selection of another stabilizer and the control of the preparation process, there is a possibility to obtain TZP ceramics with optimized properties. material possibilities

Method used

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  • Neodymia and yttrium oxide co-stabilized cubic zirconia polycrystalline ceramic and its preparation method
  • Neodymia and yttrium oxide co-stabilized cubic zirconia polycrystalline ceramic and its preparation method
  • Neodymia and yttrium oxide co-stabilized cubic zirconia polycrystalline ceramic and its preparation method

Examples

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Embodiment 1

[0024] Example 1 Neodymium nitrate hexahydrate (Nd(NO 3 ) 3 ·6H 2 O), yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 O) and monoclinic zirconia powder (average grain size less than 100 nanometers) as raw materials, designed to finally obtain neodymium oxide (Nd in TZP ceramics) 2 o 3 ) mole percent is 1.5, yttrium oxide (Y 2 o 3 ) mole percent is 1.5. Select an appropriate amount of corresponding compounds according to the above composition ratio, and prepare Nd 3+ and Y 3+ An aqueous solution with a concentration of 0.1mol / L, take an appropriate amount of the solution in a polyethylene container, use Y-TZP balls as the ball milling medium, mix it with monoclinic zirconia powder with an average grain size of less than 100 nanometers in absolute ethanol and mill it for 24 Hour. After ball milling, the suspension was dried with a rotary evaporator to obtain a powder-encapsulated precursor. The precursor was calcined in air at 800°C for 1 hour, and the thermally decomp...

Embodiment 2

[0025] Example 2 According to the composition and method of Example 1, powders were synthesized to prepare ceramics, and the sintering time was 3 hours. The XRD pattern, microscopic morphology and mechanical properties of the prepared TZP ceramics are as follows: figure 1 and figure 2 shown.

Embodiment 3

[0026] Example 3 According to the composition and method of Example 1, powders were synthesized to prepare ceramics, and the sintering time was 4 hours. The XRD pattern, microscopic morphology and mechanical properties of the prepared TZP ceramics are as follows: figure 1 and figure 2 shown.

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Abstract

The invention relates to a neodymia and yttrium oxide co-stabilized cubic zirconia polycrystalline (NdY-TZP) ceramic and its preparation method which consists of, using two oxides of neodymium oxide and yttrium oxide as stabilizer, employing an encapsulation method to prepare the co-encapsulated nano zircite powder, subjecting the synthesized powder to non-pressure clinkering in air, thus obtaining cubic zircite polycrystalline ceramic with fine mechanical performance.

Description

technical field [0001] The invention relates to tetragonal zirconia polycrystalline ((Nd, Y)-TZP) ceramics co-stabilized by neodymium oxide and yttrium oxide and a preparation method thereof. More precisely, it provides a neodymium nitrate hexahydrate (Nd(NO 3 ) 3 ·6H 2 O), yttrium nitrate hexahydrate (Y(NO 3 ) 3 ·6H 2 (Nd, Y)-TZP ceramics with excellent mechanical properties obtained by pressureless sintering to achieve densification and its preparation method, which belong to zirconia-based ceramics field. Background technique [0002] Zirconia is an important high-performance ceramic material with excellent mechanical and electrical properties, and has broad application prospects in both structural ceramics and functional ceramics. However, before 1975, material workers had limited interest in using zirconia as structural or engineering ceramics, and most applications were limited to refractory materials. This is because zirconia undergoes a phase transition from ...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor许涛王佩玲约瑟夫・务伦杰奥默・范德比斯特
OwnerSHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI