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Quantitative analysis method for residual yttrium oxide in yttria-stabilized zirconia

A technology for stabilizing zirconia and quantitative analysis, applied in the field of analysis and detection, it can solve the problems of inability to distinguish lattice content, inability to judge product stability from raw materials, and inability to further distinguish lattices, etc., to achieve high accuracy, quantitative determination, operation handy effect

Pending Publication Date: 2022-02-25
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, all YSZ materials in the domestic and foreign markets are only Y 2 o 3 Total content index, indistinguishable from lattice Y 2 o 3 and residual Y 2 o 3 content, and it is impossible to judge the stability of subsequent products in a humid environment from the raw materials
A Y 2 o 3 Analytical method for total content, but cannot further distinguish lattice Y 2 o 3 and residual Y 2 o 3 Content

Method used

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  • Quantitative analysis method for residual yttrium oxide in yttria-stabilized zirconia
  • Quantitative analysis method for residual yttrium oxide in yttria-stabilized zirconia

Examples

Experimental program
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Effect test

Embodiment 1

[0034]A residual Y in YSZ 2 o 3 Quantitative analysis method, the flow chart is shown in figure 1 , including the following steps:

[0035] 1) Prepare a clean glass beaker with a capacity of 50mL, and accurately weigh its mass (W b =49.3874g); YSZ (Shandong, China, powder grade P-18, Y 2 o 3 The total mass percentage of 7-8wt%) is ground to a particle size below 1 μm, dried in an oven at 110 ° C for 3 hours, and the resulting YSZ powder is placed in a desiccator to cool to room temperature;

[0036] 2) Accurately weigh the dried powder mass (W 0 =10.0075g) into a beaker; in a fume hood, mix 20mL of HCl with H 3 PO 4 The mixed aqueous solution (HCl concentration is 6M, H 3 PO 4 The concentration is 0.06M) into the beaker, wrap the mouth of the beaker with plastic wrap and seal the plastic wrap tightly with a rubber band, and place it in a water bath at 90°C for 4 hours; remove the plastic wrap and continue to heat the beaker with a water bath (90-95°C) until the solut...

Embodiment 2

[0042] Residual Y in a kind of YSZ stabilized zirconia 2 o 3 The quantitative analysis method specifically includes the following steps:

[0043] 1) Prepare a clean glass beaker with a capacity of 50mL, and accurately weigh its mass (W b =47.4130g); With YSZ (Japan Tosoh company, powder grade TZ-3Y, Y 2 o 3 The total mass percentage of 5-6wt%) is ground to a particle size below 1 μm, dried in an oven at 110 ° C for 3 hours, and the resulting YSZ powder is placed in a desiccator to cool to room temperature;

[0044] 2) Accurately weigh the dried powder mass (W 0 =5.0052g) into a beaker; in a fume hood, mix 15mL of HCl with H 3 PO 4 The mixed aqueous solution (HCl concentration is 3M, H 3 PO 4 The concentration is 0.03M) into the beaker, wrap the mouth of the beaker with plastic wrap and seal the plastic wrap tightly with a rubber band, and place it in a water bath at 95°C for 2 hours; remove the plastic wrap and continue to heat the beaker with a water bath Until the s...

Embodiment 3

[0050] A residual Y in YSZ 2 o 3 To further determine the lower limit and accuracy of the analytical limit of this analytical method, specifically include the following steps:

[0051] 1) 10.38 mg of high-purity Y with a particle size below 1 μm 2 o 3 Powder (99.995% by mass) and 1000.03g of high-purity ZrO with a particle size below 1 μm 2 The powder (99.8% by mass) is uniformly mixed and dried, and Y in the mixture 2 o 3 The theoretical value of the mass percentage content is 0.00104%;

[0052] 2) Prepare a clean glass beaker with a capacity of 50mL, and accurately weigh its mass (W b =49.3746g); Accurately weigh the above mixture powder quality (W 0 =10.0054g) into a beaker; in a fume hood, mix 10mL of HCl with H 3 PO 4 The mixed aqueous solution (HCl concentration is 6M, H 3 PO 4 The concentration is 0.06M) into the beaker, wrap the mouth of the beaker with plastic wrap and seal the plastic wrap tightly with a rubber band, and place it in a 90°C water bath for 3...

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Abstract

The invention discloses a quantitative analysis method for residual yttrium oxide in yttria-stabilized zirconia, which comprises the following steps: adding a mixed solution of HCl and H3PO4 into yttria-stabilized zirconia powder, and carrying out heat preservation reaction and other treatments to realize quantitative analysis of the content of the residual yttrium oxide in the yttria-stabilized zirconia powder. According to the analysis method, the quality of the yttria-stabilized zirconia can be controlled from the aspect of raw materials, and the analysis method plays an important role in improving the stability of yttria-stabilized zirconia thermal barrier coatings and yttria-stabilized zirconia biological ceramics of aviation, aerospace and ship engines; the related analysis method is simple, convenient to operate, high in accuracy and suitable for popularization and application, and large-scale analysis equipment is not needed.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a quantitative analysis method for residual yttrium oxide in yttria-stabilized zirconia. Background technique [0002] Yttria Stabilized Zirconia (Yttria Stabilized Zirconia, YSZ) is a commonly used ceramic material, especially nano-YSZ has been widely used in thermal barrier coatings of aviation, aerospace and ship engines, as well as bioceramics such as teeth and artificial joints. Yttrium oxide (Yttrium oxide), a structural stabilizer, is added to YSZ 2 o 3 ), that is, ZrO 2 and Y 2 o 3 The mixture is calcined at high temperature, and the two undergo a solid solution reaction to form YSZ. if Y 2 o 3 into the ZrO 2 in the lattice (called lattice Y 2 o 3 ), YSZ is very stable; if Y 2 o 3 No access to ZrO 2 in the crystal lattice but remain as impurities in ZrO 2 The grain interface (called residual Y 2 o 3 ), residual Y 2 o 3 React wi...

Claims

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Application Information

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IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 曹学强袁洁燕王进双蒋佳宁邓龙辉曹沁刘俐董淑娟
Owner WUHAN UNIV OF TECH
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