Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength high-temperature-resistant aluminum oxide aerogel and preparation method thereof
The invention provides high-strength and high-temperature-resistant aluminum oxide aerogel and a preparation method thereof, and belongs to the technical field of aerogel preparation. The preparation method of the high-strength and high-temperature-resistant aluminum oxide aerogel comprises the following steps: mixing aluminum salt and an ethanol solution to obtain a mixed solution; adding a gel network inducer into the mixed solution, and mixing to obtain sol; adding hollow glass beads into the sol, mixing, and standing to obtain gel; sequentially performing aging and supercritical drying on the gel to obtain the high-strength and high-temperature-resistant aluminum oxide aerogel. The result of the embodiment shows that the heat conductivity coefficient of the prepared high-strength high-temperature-resistant aluminum oxide aerogel is 0.018-0.025 W/m.k, the compressive strength is 70-80 MPa, the density is 85-100 kg/m < 3 >, and the specific surface area is 480-600 m < 2 >/g.
本发明提供了一种高强度耐高温氧化铝气凝胶及其制备方法，属于气凝胶制备技术领域。本发明提供的高强度耐高温氧化铝气凝胶的制备方法，包括以下步骤：将铝盐和乙醇溶液混合，得到混合溶液；向所述混合溶液中加入凝胶网络诱导剂，混合后得到溶胶；向所述溶胶中加入空心玻璃微珠，混合后静置得到凝胶；对所述凝胶依次进行老化和超临界干燥，得到高强度耐高温氧化铝气凝胶。实施例的结果显示，本发明制备得到的高强度耐高温氧化铝气凝胶的导热系数为0.018～0.025W/m·k，抗压强度为70～80MPa，密度为85～100kg/m3，比表面积为480～600m2/g。
High-strength high-temperature-resistant aluminum oxide aerogel and preparation method thereof
The invention provides high-strength and high-temperature-resistant aluminum oxide aerogel and a preparation method thereof, and belongs to the technical field of aerogel preparation. The preparation method of the high-strength and high-temperature-resistant aluminum oxide aerogel comprises the following steps: mixing aluminum salt and an ethanol solution to obtain a mixed solution; adding a gel network inducer into the mixed solution, and mixing to obtain sol; adding hollow glass beads into the sol, mixing, and standing to obtain gel; sequentially performing aging and supercritical drying on the gel to obtain the high-strength and high-temperature-resistant aluminum oxide aerogel. The result of the embodiment shows that the heat conductivity coefficient of the prepared high-strength high-temperature-resistant aluminum oxide aerogel is 0.018-0.025 W/m.k, the compressive strength is 70-80 MPa, the density is 85-100 kg/m < 3 >, and the specific surface area is 480-600 m < 2 >/g.
本发明提供了一种高强度耐高温氧化铝气凝胶及其制备方法，属于气凝胶制备技术领域。本发明提供的高强度耐高温氧化铝气凝胶的制备方法，包括以下步骤：将铝盐和乙醇溶液混合，得到混合溶液；向所述混合溶液中加入凝胶网络诱导剂，混合后得到溶胶；向所述溶胶中加入空心玻璃微珠，混合后静置得到凝胶；对所述凝胶依次进行老化和超临界干燥，得到高强度耐高温氧化铝气凝胶。实施例的结果显示，本发明制备得到的高强度耐高温氧化铝气凝胶的导热系数为0.018～0.025W/m·k，抗压强度为70～80MPa，密度为85～100kg/m3，比表面积为480～600m2/g。
High-strength high-temperature-resistant aluminum oxide aerogel and preparation method thereof
一种高强度耐高温氧化铝气凝胶及其制备方法
XU QIANJIN (Autor:in) / LIU KUNJI (Autor:in)
12.05.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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