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Zirconia/titania/ceria doped rare earth tantalum/niobate (reta/nbo 4 ) ceramic powder and preparation method thereof

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

Active Publication Date: 2020-06-09
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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  • Zirconia/titania/ceria doped rare earth tantalum/niobate (reta/nbo <sub>4</sub> ) ceramic powder and preparation method thereof
  • Zirconia/titania/ceria doped rare earth tantalum/niobate (reta/nbo <sub>4</sub> ) ceramic powder and preparation method thereof
  • Zirconia/titania/ceria doped rare earth tantalum/niobate (reta/nbo <sub>4</sub> ) 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 / titania / 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 zirconia / titanium oxide / cerium oxide doped rare earth tantalum / niobate RETa / NbO 4 Ceramic powder and its preparation method. Zirconia / Titanium Oxide / Cerium Oxide Doped Rare Earth Tantalum / Nobate RETa / NbO 4 Ceramic powder, its chemical formula is RE 1‑x (Ta / Nb) 1‑x (Zr / Ce / Ti) 2x o 4 , 0<x<1, the crystal structure of the ceramic powder is an orthorhombic phase, and the lattice space group is C222 1 , the particle size is 10-70μm, and the ceramic powder is spherical. During preparation, the raw materials are ball milled, reacted by high-temperature solid phase method, mixed with solvent and organic binder to obtain slurry C, and dried pellets are obtained after centrifugal atomization, and then sintered to obtain a satisfying Zirconia / titania / ceria doped rare earth tantalum / niobate RETa / NbO required by APS technology for ceramic powder 4 Ceramic powder.

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 / NbO4) ceramic powder and a preparation method thereof. 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 resea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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