Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature-resistant ultrahigh-porosity high-entropy rare earth silicate and preparation method thereof
The invention relates to the field of light porous high-temperature thermal insulation materials, in particular to ultrahigh-porosity high-entropy rare earth silicate with good high-temperature resistance and a preparation method of the ultrahigh-porosity high-entropy rare earth silicate. The high-entropy rare earth silicate is specifically single-phase (YaHobYbcLudXe) 2Si2O7, the value range of a, b, c and d is 10%-35% by mole, the value range of e is 0%-35% by mole, a + b + c + d + e = 1, X is Sc, Tm, Er, Dy or Tb, and the porosity range of the high-entropy rare earth silicate material is 85%-96%. The rare earth oxide and the silicon oxide powder are used as raw materials, water is used as a dispersion medium to prepare ceramic slurry, a dispersing agent is added to uniformly disperse slurry particles, then a foaming agent is added and rapidly stirred for foaming, then injection molding and low-temperature freezing are performed, and then vacuum drying and demolding are performed. And finally, performing high-temperature sintering in a muffle furnace to prepare the porous high-entropy rare earth silicate high-temperature thermal insulation material. The preparation method is simple in preparation process, low in cost, green and environment-friendly, and has a wide application prospect in the field of thermal protection of aerospace.
本发明涉及轻质多孔高温隔热材料领域，具体为一种耐高温性好的超高孔隙率高熵稀土硅酸盐及制备方法。高熵稀土硅酸盐具体为单相的(YaHobYbcLudXe)2Si2O7，按摩尔百分比计，a、b、c和d的取值范围为10％～35％，e的取值范围为0％～35％，且a+b+c+d+e＝1，X为Sc、Tm、Er、Dy或Tb，高熵稀土硅酸盐材料的孔隙率范围为85％～96％。以上述稀土氧化物、氧化硅粉末为原料，以水为分散介质配制陶瓷浆料，加入分散剂使浆料颗粒分散均匀，然后加入发泡剂并快速搅拌发泡，随后注模和低温冷冻，接着进行真空干燥和脱模。最后在马弗炉中高温烧结，制备出多孔高熵稀土硅酸盐高温隔热材料。本发明制备工艺简单，成本低廉，绿色环保，在航空航天的热防护领域具有广阔的应用前景。
High-temperature-resistant ultrahigh-porosity high-entropy rare earth silicate and preparation method thereof
The invention relates to the field of light porous high-temperature thermal insulation materials, in particular to ultrahigh-porosity high-entropy rare earth silicate with good high-temperature resistance and a preparation method of the ultrahigh-porosity high-entropy rare earth silicate. The high-entropy rare earth silicate is specifically single-phase (YaHobYbcLudXe) 2Si2O7, the value range of a, b, c and d is 10%-35% by mole, the value range of e is 0%-35% by mole, a + b + c + d + e = 1, X is Sc, Tm, Er, Dy or Tb, and the porosity range of the high-entropy rare earth silicate material is 85%-96%. The rare earth oxide and the silicon oxide powder are used as raw materials, water is used as a dispersion medium to prepare ceramic slurry, a dispersing agent is added to uniformly disperse slurry particles, then a foaming agent is added and rapidly stirred for foaming, then injection molding and low-temperature freezing are performed, and then vacuum drying and demolding are performed. And finally, performing high-temperature sintering in a muffle furnace to prepare the porous high-entropy rare earth silicate high-temperature thermal insulation material. The preparation method is simple in preparation process, low in cost, green and environment-friendly, and has a wide application prospect in the field of thermal protection of aerospace.
本发明涉及轻质多孔高温隔热材料领域，具体为一种耐高温性好的超高孔隙率高熵稀土硅酸盐及制备方法。高熵稀土硅酸盐具体为单相的(YaHobYbcLudXe)2Si2O7，按摩尔百分比计，a、b、c和d的取值范围为10％～35％，e的取值范围为0％～35％，且a+b+c+d+e＝1，X为Sc、Tm、Er、Dy或Tb，高熵稀土硅酸盐材料的孔隙率范围为85％～96％。以上述稀土氧化物、氧化硅粉末为原料，以水为分散介质配制陶瓷浆料，加入分散剂使浆料颗粒分散均匀，然后加入发泡剂并快速搅拌发泡，随后注模和低温冷冻，接着进行真空干燥和脱模。最后在马弗炉中高温烧结，制备出多孔高熵稀土硅酸盐高温隔热材料。本发明制备工艺简单，成本低廉，绿色环保，在航空航天的热防护领域具有广阔的应用前景。
High-temperature-resistant ultrahigh-porosity high-entropy rare earth silicate and preparation method thereof
一种耐高温性好的超高孔隙率高熵稀土硅酸盐及制备方法
WU ZHEN (Autor:in) / ZHOU JIAXIN (Autor:in) / WANG JINGYANG (Autor:in) / ZENG DAWEI (Autor:in) / LUO ZHIXIN (Autor:in) / SUN LUCHAO (Autor:in)
26.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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