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Zirconium oxide/titanium oxide/cerium oxide doped rare earth tantalum/niobate RETa/NbO4 ceramic powder and preparation method thereof

A ceramic powder, titanium oxide technology, applied in chemical instruments and methods, inorganic chemistry, tantalum compounds, etc., to achieve the effect of good fluidity and short drying time

Active Publication Date: 2019-03-29
陕西天璇涂层科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no process that can prepare rare earth tantalate ceramic powders that meet the APS process.

Method used

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  • Zirconium oxide/titanium oxide/cerium oxide doped rare earth tantalum/niobate RETa/NbO4 ceramic powder and preparation method thereof
  • Zirconium oxide/titanium oxide/cerium oxide doped rare earth tantalum/niobate RETa/NbO4 ceramic powder and preparation method thereof
  • Zirconium oxide/titanium oxide/cerium oxide doped rare earth tantalum/niobate RETa/NbO4 ceramic powder and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0053] Zirconia (ZrO 2 ) doped rare earth carbonate (RETaO 4 ) ceramic powder (Sc 0.8 Ta 0.8 Zr 0.4 o 4 ) preparation method, comprising the following steps:

[0054] step 1):

[0055] Zirconia (ZrO 2 ) powder, rare earth oxide powder Sc 2 o 3 , tantalum pentoxide (Ta 2 o 5 ) powder for pre-drying, the pre-drying temperature is 600°C, and the pre-drying time is 8h; and weigh 5.58g zirconia (ZrO 2 ) powder, 6.24g rare earth oxide powder Sc 2 o 3 , 20g tantalum oxide (Ta 2 o 5 ) powder into the ethanol solvent to obtain a mixed solution, so that the molar ratio of Sc:Ta:Zr in the mixed solution is 2:2:1; then use a ball mill to mill the mixed solution for 10 h, and the speed of the ball mill is 300r / min.

[0056] The slurry obtained after ball milling was dried using a rotary evaporator (model: N-1200B) at a drying temperature of 60°C and a drying time of 2 hours. The dried powder was sieved through a 300-mesh sieve to obtain powder A.

[0057] Step (2):

[0058...

Embodiment 1

[0068] The zirconia-doped rare earth tantalate ceramic powder (Sc) prepared in Example 1 0.8 Ta 0.8 Zr 0.4 o 4 ) SEM spectrum such as figure 2 shown, from figure 2 It can be seen that the particle size range of the powder is 10-70 μm, and the shape is spherical. And the zirconia / titanium oxide / cerium oxide doped rare earth tantalum / niobate RETa / NbO that embodiment 2-12 obtains 4 The particle size range of the ceramic powder is 10-70 μm, and they all have a spherical shape.

[0069] Enumerate comparative example 3 groups and the ceramic powder that embodiment 1-12 obtains compares:

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Abstract

The invention belongs to the technical field of ceramic powder preparation, and discloses zirconium oxide / titanium oxide / cerium oxide doped rare earth tantalum / niobate RETa / NbO4 ceramic powder and a preparation method thereof. The zirconium oxide / titanium oxide / cerium oxide doped rare earth tantalum / niobate RETa / NbO4 ceramic powder has a chemical general formula being RE1-x(Ta / Nb)1-x(Zr / Ce / Ti)2xO4, wherein x is greater than 0 but smaller than 1. The crystal structure of the ceramic powder is an orthorhombic phase; the crystal lattice space group is C2221; the particle diameter is 10 to 70 mum;the ceramic powder is in a spherical shape. During the preparation, the raw materials are subjected to ball milling; then, after the reaction by a high-temperature solid phase method, a mixture is mixed with solvents and organic bonding agents to obtain slurry C; centrifugal atomization is performed to obtain dried particle materials; next, sintering is performed; the zirconium oxide / titanium oxide / cerium oxide doped rare earth tantalum / niobate RETa / NbO4 ceramic powder meeting the requirement of the APS (atmospheric plasma spraying) technology on the ceramic powder is obtained.

Description

technical field [0001] The invention belongs to the field of ceramic powder preparation, in particular to a zirconia / titanium oxide / cerium oxide doped rare earth tantalum / niobate RETa / NbO 4 Ceramic powder and its preparation method. Background technique [0002] Thermal barrier coating materials are mainly used in the aero-engine industry. They have the advantages of low thermal conductivity, high thermal expansion coefficient, anti-sintering, and good high-temperature stability. They mainly play a role in heat insulation, anti-oxidation, and effective resistance to particle impact to protect high-temperature areas of aero-engines. The role of the component base. [0003] YSZ (yttria stabilized zirconia) is currently the most widely studied and applied thermal barrier coating, but because of the phase transition of YSZ above 1200 °C, the coating fails, prompting researchers to look for thermal barrier coatings that can replace YSZ. Barrier coating. In 2007, the research gr...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/495C04B35/626
CPCC04B35/495C04B35/50C04B35/62645C04B2235/3224C04B2235/3244C04B2235/3232C04B2235/3229C04B2235/3251C04B2235/76C04B2235/5436C04B2235/528C04B2235/3225C04B35/6261C04B35/62675C04B35/6263C04B35/62655C04B2235/6567C04B35/632C04B35/63416C04B35/6264C04B2235/656C04B2235/3227C04B2235/5463C04B2235/81C01P2004/61C01P2004/03C01P2002/72C01G35/006C01P2002/52C01P2002/76C01P2004/32C04B2235/95C04B35/486C04B35/462Y02T50/60C04B35/62625C04B35/64
Inventor 冯晶吴鹏葛振华宋鹏
Owner 陕西天璇涂层科技有限公司
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