Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SiOCN ceramic aerogel wave-absorbing material and preparation method thereof
The invention belongs to the field of ceramic aerogel, and discloses a SiOCN ceramic aerogel wave-absorbing material and a preparation method thereof.The preparation method comprises the following steps that 1, terephthalaldehyde, organosiloxane, amino silane, acetic acid, ethyl alcohol and deionized water are mixed to be uniform, and polysiloxane wet gel is obtained through organosilane hydrolysis copolycondensation reaction; (2) performing aging and vacuum drying on the polysiloxane wet gel obtained in the step (1) to obtain polysiloxane aerogel; and (3) heating the polysiloxane aerogel obtained in the step (2) to 800-1200 DEG C in an argon or nitrogen atmosphere at a heating rate of 1-5 DEG C/min, and carrying out high-temperature heat treatment for 1-3 hours to obtain the blocky SiOCN aerogel. According to the method, the preparation process of the SiOCN aerogel is greatly simplified, the production cost is reduced, the operability and controllability of the process are improved, the raw materials adopted by the method are low in cost, good in chemical stability and insensitive to air and moisture, and the safety risk in the production process is greatly reduced.
本发明属于陶瓷气凝胶领域，公开了一种SiOCN陶瓷气凝胶吸波材料及其制备方法，其制备方法包括以下步骤：(1)将对苯二甲醛、有机硅氧烷、氨基硅烷、醋酸、乙醇和去离子水混合均匀，经过有机硅烷水解共缩聚反应得到聚硅氧烷湿凝胶；(2)将步骤(1)得到的聚硅氧烷湿凝胶经过老化和真空干燥获得聚硅氧烷气凝胶；(3)将步骤(2)得到的聚硅氧烷气凝胶在氩气或氮气氛围下以1‑5℃/min升温速率加热至800‑1200℃高温热处理1‑3h，得到块状SiOCN气凝胶。本发明极大地简化了SiOCN气凝胶的制备工艺，降低了生产成本，增加了工艺的可操作性和可控性，本发明采用的原料成本低廉，具有良好的化学稳定性，对空气和水份不敏感，极大地降低了生产过程中安全风险。
SiOCN ceramic aerogel wave-absorbing material and preparation method thereof
The invention belongs to the field of ceramic aerogel, and discloses a SiOCN ceramic aerogel wave-absorbing material and a preparation method thereof.The preparation method comprises the following steps that 1, terephthalaldehyde, organosiloxane, amino silane, acetic acid, ethyl alcohol and deionized water are mixed to be uniform, and polysiloxane wet gel is obtained through organosilane hydrolysis copolycondensation reaction; (2) performing aging and vacuum drying on the polysiloxane wet gel obtained in the step (1) to obtain polysiloxane aerogel; and (3) heating the polysiloxane aerogel obtained in the step (2) to 800-1200 DEG C in an argon or nitrogen atmosphere at a heating rate of 1-5 DEG C/min, and carrying out high-temperature heat treatment for 1-3 hours to obtain the blocky SiOCN aerogel. According to the method, the preparation process of the SiOCN aerogel is greatly simplified, the production cost is reduced, the operability and controllability of the process are improved, the raw materials adopted by the method are low in cost, good in chemical stability and insensitive to air and moisture, and the safety risk in the production process is greatly reduced.
本发明属于陶瓷气凝胶领域，公开了一种SiOCN陶瓷气凝胶吸波材料及其制备方法，其制备方法包括以下步骤：(1)将对苯二甲醛、有机硅氧烷、氨基硅烷、醋酸、乙醇和去离子水混合均匀，经过有机硅烷水解共缩聚反应得到聚硅氧烷湿凝胶；(2)将步骤(1)得到的聚硅氧烷湿凝胶经过老化和真空干燥获得聚硅氧烷气凝胶；(3)将步骤(2)得到的聚硅氧烷气凝胶在氩气或氮气氛围下以1‑5℃/min升温速率加热至800‑1200℃高温热处理1‑3h，得到块状SiOCN气凝胶。本发明极大地简化了SiOCN气凝胶的制备工艺，降低了生产成本，增加了工艺的可操作性和可控性，本发明采用的原料成本低廉，具有良好的化学稳定性，对空气和水份不敏感，极大地降低了生产过程中安全风险。
SiOCN ceramic aerogel wave-absorbing material and preparation method thereof
一种SiOCN陶瓷气凝胶吸波材料及其制备方法
SHAO GAOFENG (Autor:in) / HU DONGXIAO (Autor:in) / DING CHENGXI (Autor:in) / HE XINRUI (Autor:in) / HUANG XIAOGU (Autor:in)
05.04.2022
Patent
Elektronische Ressource
Chinesisch
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