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Preparation method of multiphase porous laminated structure heat shielding ceramic
The invention discloses a preparation method of composite porous laminated structure heat shielding ceramic, and belongs to the technical field of heat protection ceramic materials. The invention aims to solve the problems that the thermal conductivity of the existing thermal barrier ceramic material is limited by the limit phonon thermal conductivity and the infrared band transmittance is high, so that the thermal radiation penetration at high temperature is strong and the thermal shielding effect is poor. The method comprises the following steps: 1, selecting proper porous-phase ceramic and dense-phase ceramic; 2, preparing slurry and carrying out tape casting; and 3, high-temperature sintering. Compared with existing thermal barrier ceramics, the preparation method of the composite porous laminated structure thermal shielding ceramic breaks through the bottlenecks that thermal barrier ceramics such as niobate, zirconate, hafnate, tanmate and cerate are high in infrared transmittance and high in phonon thermal conductivity after ion doping; compared with the existing multi-layer structure ceramic, the compact-porous laminated multi-layer structure design breaks through the limitation of large refractive index difference and the bottleneck problem of high-temperature oxidation of the metal layer, and further improves the high-temperature heat shielding performance.
一种复相多孔叠层结构热屏蔽陶瓷的制备方法，它属于热防护陶瓷材料技术领域。本发明的目的是要解决现有热障陶瓷材料热导率受限于其极限声子热导率，红外波段透过率高，导致高温下热辐射穿透强，热屏蔽效果差的问题。方法：一、选取合适的多孔相陶瓷和致密相陶瓷；二、制备浆料与流延成型；三、高温烧结。本发明一种复相多孔叠层结构热屏蔽陶瓷的制备方法，与现有的热障陶瓷相比，突破了铌酸盐、锆酸盐、铪酸盐、坦酸盐、铈酸盐等热障陶瓷红外透过率高，离子掺杂后声子热导率高的瓶颈；与现有的多层结构陶瓷相比，其致密‑多孔叠层的多层结构设计，突破了大折射率差异的限制以及金属层高温氧化的瓶颈问题，进一步提高了高温热屏蔽性能。
Preparation method of multiphase porous laminated structure heat shielding ceramic
The invention discloses a preparation method of composite porous laminated structure heat shielding ceramic, and belongs to the technical field of heat protection ceramic materials. The invention aims to solve the problems that the thermal conductivity of the existing thermal barrier ceramic material is limited by the limit phonon thermal conductivity and the infrared band transmittance is high, so that the thermal radiation penetration at high temperature is strong and the thermal shielding effect is poor. The method comprises the following steps: 1, selecting proper porous-phase ceramic and dense-phase ceramic; 2, preparing slurry and carrying out tape casting; and 3, high-temperature sintering. Compared with existing thermal barrier ceramics, the preparation method of the composite porous laminated structure thermal shielding ceramic breaks through the bottlenecks that thermal barrier ceramics such as niobate, zirconate, hafnate, tanmate and cerate are high in infrared transmittance and high in phonon thermal conductivity after ion doping; compared with the existing multi-layer structure ceramic, the compact-porous laminated multi-layer structure design breaks through the limitation of large refractive index difference and the bottleneck problem of high-temperature oxidation of the metal layer, and further improves the high-temperature heat shielding performance.
一种复相多孔叠层结构热屏蔽陶瓷的制备方法，它属于热防护陶瓷材料技术领域。本发明的目的是要解决现有热障陶瓷材料热导率受限于其极限声子热导率，红外波段透过率高，导致高温下热辐射穿透强，热屏蔽效果差的问题。方法：一、选取合适的多孔相陶瓷和致密相陶瓷；二、制备浆料与流延成型；三、高温烧结。本发明一种复相多孔叠层结构热屏蔽陶瓷的制备方法，与现有的热障陶瓷相比，突破了铌酸盐、锆酸盐、铪酸盐、坦酸盐、铈酸盐等热障陶瓷红外透过率高，离子掺杂后声子热导率高的瓶颈；与现有的多层结构陶瓷相比，其致密‑多孔叠层的多层结构设计，突破了大折射率差异的限制以及金属层高温氧化的瓶颈问题，进一步提高了高温热屏蔽性能。
Preparation method of multiphase porous laminated structure heat shielding ceramic
一种复相多孔叠层结构热屏蔽陶瓷的制备方法
CHEN GUOLIANG (Autor:in) / WANG YAMING (Autor:in) / WANG SHUQI (Autor:in) / ZOU YONGCHUN (Autor:in) / QIU JUN (Autor:in) / OUYANG JIAHU (Autor:in) / SHUAI YONG (Autor:in) / ZHOU YU (Autor:in)
01.11.2024
Patent
Elektronische Ressource
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