Aluminum oxide-lanthanum hexaaluminate special heat-insulating refractory material as well as preparation method and application thereof

• Main Authors: LI YUE, CHENG GUANGHAI, LIU YUHUI, LI GUIFANG, SUN WENJIE, JIANG PENGCHENG, DONG XUANZE, ZHANG YAZHI, WU ZHI, ZHANG XIAOJING, LIN HEXUAN, XIONG XIN, SHAN XINGJIAN, TIAN LIAOYUAN, YAN LIN, ZHOU YUQI
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention discloses an aluminum oxide-lanthanum hexaaluminate special heat-insulating refractory material as well as a preparation method and application thereof, and relates to the field of heat-insulating refractory materials for high-temperature kiln linings. The preparation method comprises the following steps: taking tabular corundum fine powder, activated aluminum oxide micro powder, lanthanum oxide micro powder and lanthanum aluminate micro powder with proper granularity as raw materials, selecting hydratable aluminum oxide as a binding agent, adding water, and stirring to obtain slurry; micron-sized spherical foam prepared from an animal protein foaming agent is used as a pore-forming template to be added into the slurry, and the material can be obtained through stirring, casting molding, curing, demolding, drying and high-temperature sintering. Compared with an existing porous heat insulation material, the aluminum oxide-lanthanum hexaaluminate special heat insulation refractory material prepared