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Modified monosilicate ceramic material with low thermal expansion and low thermal conductivity as well as preparation method and application of modified monosilicate ceramic material
The invention provides a modified monosilicate ceramic material with low thermal expansion and low thermal conductivity as well as a preparation method and application thereof, and relates to the technical field of aero-engine coating materials, the modified monosilicate ceramic material is (Yb1-XLuX) 2SiO5, X is equal to 0.1-0.5, the (Yb1-XLuX) 2SiO5 is prepared from Yb2O3 powder, Lu2O3 powder and SiO2 powder, and the molar ratio of the Yb2O3 powder to the Lu2O3 powder to the SiO2 powder is (10-10x): 10x: 10. According to the modified monosilicate ceramic material with low thermal expansion and low thermal conductivity, a modified monosilicate (Yb1-XLuX) 2SiO5 block is obtained through dry pressing molding and high-temperature sintering, doping of Lu < 3 + > enables the deformation degree of crystal lattices to be increased, phonon scattering of crystals is enhanced, and the thermal conductivity of the crystals is improved. Therefore, the thermal conductivity and the thermal expansion coefficient of the material are lower than those of a single rare earth monosilicate Yb2SiO5 ceramic material, the material is suitable for serving under the working condition of higher temperature, and the thermal cycle service life of an environmental barrier coating is prolonged.
本发明提供一种低热膨胀低热导率的改性单硅酸盐陶瓷材料、制备方法及其应用，涉及航空发动机涂层材料技术领域，改性单硅酸盐陶瓷材料为(Yb1‑XLuX)2SiO5，其中X=0.1~0.5，所述(Yb1‑XLuX)2SiO5由Yb2O3粉末，Lu2O3粉末及SiO2粉末制备而成，所述Yb2O3粉末、Lu2O3粉末及SiO2粉末的摩尔比为10‑10x:10x:10。本发明的低热膨胀低热导率的改性单硅酸盐陶瓷材料，通过干压成型、高温烧结获得的改性单硅酸盐(Yb1‑XLuX)2SiO5块材，Lu3+的掺杂使晶格的变形程度增加，并且增强了晶体的声子散射，从而使该材料热导率和热膨胀系数比单一稀土单硅酸盐Yb2SiO5陶瓷材料更低，适合于更高温度的工况下服役，并且有利于提高环境障碍涂层的热循环服役寿命。
Modified monosilicate ceramic material with low thermal expansion and low thermal conductivity as well as preparation method and application of modified monosilicate ceramic material
The invention provides a modified monosilicate ceramic material with low thermal expansion and low thermal conductivity as well as a preparation method and application thereof, and relates to the technical field of aero-engine coating materials, the modified monosilicate ceramic material is (Yb1-XLuX) 2SiO5, X is equal to 0.1-0.5, the (Yb1-XLuX) 2SiO5 is prepared from Yb2O3 powder, Lu2O3 powder and SiO2 powder, and the molar ratio of the Yb2O3 powder to the Lu2O3 powder to the SiO2 powder is (10-10x): 10x: 10. According to the modified monosilicate ceramic material with low thermal expansion and low thermal conductivity, a modified monosilicate (Yb1-XLuX) 2SiO5 block is obtained through dry pressing molding and high-temperature sintering, doping of Lu < 3 + > enables the deformation degree of crystal lattices to be increased, phonon scattering of crystals is enhanced, and the thermal conductivity of the crystals is improved. Therefore, the thermal conductivity and the thermal expansion coefficient of the material are lower than those of a single rare earth monosilicate Yb2SiO5 ceramic material, the material is suitable for serving under the working condition of higher temperature, and the thermal cycle service life of an environmental barrier coating is prolonged.
本发明提供一种低热膨胀低热导率的改性单硅酸盐陶瓷材料、制备方法及其应用，涉及航空发动机涂层材料技术领域，改性单硅酸盐陶瓷材料为(Yb1‑XLuX)2SiO5，其中X=0.1~0.5，所述(Yb1‑XLuX)2SiO5由Yb2O3粉末，Lu2O3粉末及SiO2粉末制备而成，所述Yb2O3粉末、Lu2O3粉末及SiO2粉末的摩尔比为10‑10x:10x:10。本发明的低热膨胀低热导率的改性单硅酸盐陶瓷材料，通过干压成型、高温烧结获得的改性单硅酸盐(Yb1‑XLuX)2SiO5块材，Lu3+的掺杂使晶格的变形程度增加，并且增强了晶体的声子散射，从而使该材料热导率和热膨胀系数比单一稀土单硅酸盐Yb2SiO5陶瓷材料更低，适合于更高温度的工况下服役，并且有利于提高环境障碍涂层的热循环服役寿命。
Modified monosilicate ceramic material with low thermal expansion and low thermal conductivity as well as preparation method and application of modified monosilicate ceramic material
低热膨胀低热导率的改性单硅酸盐陶瓷材料、制备方法及其应用
MIAO QIANG (author) / TAN XIAOQI (author) / LIANG WENPING (author) / LIU RUIXIANG (author) / ZHAO HUI (author) / SHI JIYUAN (author) / ZANG KAI (author) / LIU XINLI (author)
2024-09-27
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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