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Quartz composite material with PyC coating on surface and preparation method thereof
The invention belongs to the technical field of quartz composite materials, and particularly relates to a quartz composite material with a PyC coating on the surface and a preparation method of the quartz composite material. Comprising the following steps: (1) performing soaking heat treatment on quartz fibers to obtain a quartz fiber preform; (2) preparing a polyimide solution; (3) mixing the quartz fiber preform with a polyimide solution, and carrying out vacuum impregnation, heating and heat preservation; and (4) immersing the quartz composite material in silica sol, carrying out vacuum impregnation and heat preservation standing to form gel, drying and sintering the gel, and carrying out circulating vacuum impregnation until the density is not increased any more to obtain the quartz composite material with the PyC coating on the surface. The PyC coating is constructed on the surface of the quartz fiber through a PIP process, so that the mechanical property of the quartz composite material is effectively improved, and the durability and the reliability are enhanced. In addition, the quartz composite material shows excellent wave transmission performance in the x wave band, the dielectric constant is stable, the loss is extremely low, and an important thought is provided for preparation of aircraft radar and radome materials.
本发明属于石英复合材料技术领域，具体涉及表面具有PyC涂层的石英复合材料及其制备方法。包括以下步骤：（1）将石英纤维浸泡热处理后得到石英纤维预制体；（2）配制聚酰亚胺溶液；（3）将石英纤维预制体与聚酰亚胺溶液混合后进行真空浸渍与升温保温；（4）然后浸入硅溶胶中，经真空浸渍与保温静置后形成凝胶，凝胶干燥烧结后循环真空浸渍至密度不再增加，即得表面具有PyC涂层的石英复合材料。通过PIP工艺在石英纤维表面构建了PyC涂层，有效提升了石英复合材料力学性能，增强了耐用性和可靠性。此外，该石英复合材料在x波段展现出优异的透波性能，介电常数稳定，损耗极低，为飞机雷达及天线罩材料的制备提供了重要思路。
Quartz composite material with PyC coating on surface and preparation method thereof
The invention belongs to the technical field of quartz composite materials, and particularly relates to a quartz composite material with a PyC coating on the surface and a preparation method of the quartz composite material. Comprising the following steps: (1) performing soaking heat treatment on quartz fibers to obtain a quartz fiber preform; (2) preparing a polyimide solution; (3) mixing the quartz fiber preform with a polyimide solution, and carrying out vacuum impregnation, heating and heat preservation; and (4) immersing the quartz composite material in silica sol, carrying out vacuum impregnation and heat preservation standing to form gel, drying and sintering the gel, and carrying out circulating vacuum impregnation until the density is not increased any more to obtain the quartz composite material with the PyC coating on the surface. The PyC coating is constructed on the surface of the quartz fiber through a PIP process, so that the mechanical property of the quartz composite material is effectively improved, and the durability and the reliability are enhanced. In addition, the quartz composite material shows excellent wave transmission performance in the x wave band, the dielectric constant is stable, the loss is extremely low, and an important thought is provided for preparation of aircraft radar and radome materials.
本发明属于石英复合材料技术领域，具体涉及表面具有PyC涂层的石英复合材料及其制备方法。包括以下步骤：（1）将石英纤维浸泡热处理后得到石英纤维预制体；（2）配制聚酰亚胺溶液；（3）将石英纤维预制体与聚酰亚胺溶液混合后进行真空浸渍与升温保温；（4）然后浸入硅溶胶中，经真空浸渍与保温静置后形成凝胶，凝胶干燥烧结后循环真空浸渍至密度不再增加，即得表面具有PyC涂层的石英复合材料。通过PIP工艺在石英纤维表面构建了PyC涂层，有效提升了石英复合材料力学性能，增强了耐用性和可靠性。此外，该石英复合材料在x波段展现出优异的透波性能，介电常数稳定，损耗极低，为飞机雷达及天线罩材料的制备提供了重要思路。
Quartz composite material with PyC coating on surface and preparation method thereof
表面具有PyC涂层的石英复合材料及其制备方法
WEN GUANGWU (author) / ZHANG XIA (author) / CHEN YANG (author) / ZHANG LIJUAN (author)
2024-11-01
Patent
Electronic Resource
Chinese
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