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Preparation method of high-temperature-resistant aluminum oxide-silicon oxide aerogel composite material
The invention discloses a preparation method of a high-temperature-resistant aluminum oxide-silicon oxide aerogel composite material, wherein the preparation method comprises the following steps: (1) sufficiently dispersing and mixing nano aluminum oxide powder, micron aluminum oxide powder, an infrared opacifying agent and short fibers to obtain a mixture A; (2) performing compression molding on the mixture A to obtain an aluminum oxide composite material; (3) uniformly mixing a silicon source, ethanol and water to obtain silicon dioxide sol; (4) dipping the aluminum oxide composite material by adopting silicon dioxide sol; and (5) performing drying treatment to obtain the high-temperature-resistant aluminum oxide-silicon oxide aerogel composite material. According to the preparation method disclosed by the invention, compounding of aluminum oxide and silicon oxide aerogel is realized through impregnation, a complex preparation process is avoided, the preparation period is shortened, the silicon oxide aerogel is fixed in the aluminum oxide composite material, the compactness of the aluminum oxide composite material is further increased, the composite material has relatively good mechanical properties, and great shrinkage of the aluminum oxide composite material at high temperature is avoided.
本发明公开了一种耐高温氧化铝‑氧化硅气凝胶复合材料的制备方法，包括以下步骤：（1）将纳米氧化铝粉、微米氧化铝粉、红外遮光剂和短纤维充分分散混合，得到混合料A；（2）将混合料A压制成型，得到氧化铝复合材料；（3）取硅源、乙醇和水混合均匀得到二氧化硅溶胶；（4）采用二氧化硅溶胶对氧化铝复合材料进行浸渍；（5）干燥处理，得到耐高温氧化铝‑氧化硅气凝胶复合材料。本发明中通过浸渍实现了氧化铝与氧化硅气凝胶的复合，避免了复杂的的制备工艺，缩短制备周期，将二氧化硅气凝胶固定在氧化铝复合材料内部，进一步增加氧化铝复合材料的密实程度，具有较好的力学性能，避免高温下氧化铝复合材料产生较大收缩。
Preparation method of high-temperature-resistant aluminum oxide-silicon oxide aerogel composite material
The invention discloses a preparation method of a high-temperature-resistant aluminum oxide-silicon oxide aerogel composite material, wherein the preparation method comprises the following steps: (1) sufficiently dispersing and mixing nano aluminum oxide powder, micron aluminum oxide powder, an infrared opacifying agent and short fibers to obtain a mixture A; (2) performing compression molding on the mixture A to obtain an aluminum oxide composite material; (3) uniformly mixing a silicon source, ethanol and water to obtain silicon dioxide sol; (4) dipping the aluminum oxide composite material by adopting silicon dioxide sol; and (5) performing drying treatment to obtain the high-temperature-resistant aluminum oxide-silicon oxide aerogel composite material. According to the preparation method disclosed by the invention, compounding of aluminum oxide and silicon oxide aerogel is realized through impregnation, a complex preparation process is avoided, the preparation period is shortened, the silicon oxide aerogel is fixed in the aluminum oxide composite material, the compactness of the aluminum oxide composite material is further increased, the composite material has relatively good mechanical properties, and great shrinkage of the aluminum oxide composite material at high temperature is avoided.
本发明公开了一种耐高温氧化铝‑氧化硅气凝胶复合材料的制备方法，包括以下步骤：（1）将纳米氧化铝粉、微米氧化铝粉、红外遮光剂和短纤维充分分散混合，得到混合料A；（2）将混合料A压制成型，得到氧化铝复合材料；（3）取硅源、乙醇和水混合均匀得到二氧化硅溶胶；（4）采用二氧化硅溶胶对氧化铝复合材料进行浸渍；（5）干燥处理，得到耐高温氧化铝‑氧化硅气凝胶复合材料。本发明中通过浸渍实现了氧化铝与氧化硅气凝胶的复合，避免了复杂的的制备工艺，缩短制备周期，将二氧化硅气凝胶固定在氧化铝复合材料内部，进一步增加氧化铝复合材料的密实程度，具有较好的力学性能，避免高温下氧化铝复合材料产生较大收缩。
Preparation method of high-temperature-resistant aluminum oxide-silicon oxide aerogel composite material
一种耐高温氧化铝-氧化硅气凝胶复合材料的制备方法
ZHANG DONGSHENG (author) / DONG HUINA (author) / YAO DONGJIA (author) / ZHANG JICHENG (author) / LIU XIZONG (author) / WU HENG (author) / ZHAO YAN (author) / PAN GUANGZHEN (author) / LI SHUAISHUAI (author)
2021-12-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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