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Preparation method of high-pressure-resistant and impact-resistant aluminum oxide ceramic nanofiltration membrane support
The invention discloses a preparation method of a high-pressure-resistant and impact-resistant alumina ceramic nanofiltration membrane support, which comprises the following steps: firstly, uniformly wrapping the surfaces of alumina ceramic particles with nanoparticles by adopting a high-pressure hydrothermal method, and filling crack defects in the particles; besides, a microwave low-temperature rapid one-time sintering technology is adopted, a uniform and rapid heating mode is utilized, and the nano zirconium oxide particles are stably and rapidly combined into cracks on the surface of the large-particle aluminum oxide ceramic powder and in the particles by combining the high wave absorbing efficiency of the nano zirconium oxide particles (the efficiency is superior to that of large-particle alpha-aluminum oxide). According to the invention, the problems of desorption, agglomeration and segregation of nano-particles possibly occurring in the subsequent mixing, forming and sintering processes are effectively avoided, so that the defects and non-uniformity of the ceramic membrane support body are reduced. Meanwhile, compared with a traditional heating method, more uniform temperature distribution is achieved through microwave heating, and abnormal agglomeration and growth of nanocrystals are prevented.
本发明公开了一种耐高压抗冲击氧化铝陶瓷纳滤膜支撑体的制备方法，首先采用高压水热法，将纳米粒子均匀地包裹在氧化铝陶瓷颗粒的表面，并填充颗粒内部的裂纹缺陷。此外，本发明采用了微波低温快速一次烧结技术，利用均匀快速的加热方式，结合纳米氧化锆颗粒的高吸波效率(这一效率优于大颗粒α‑氧化铝)，将纳米氧化锆颗粒稳定且迅速地结合到大颗粒氧化铝陶瓷粉体的表面和颗粒内部的裂缝中。本发明有效避免了后续混料、成型及烧结过程中可能出现的纳米颗粒脱附、团聚和偏析问题，从而减少了陶瓷膜支撑体的缺陷和不均匀性。同时，与传统加热方法相比，本发明中的微波加热实现了更均匀的温度分布，防止了纳米晶粒的异常团聚和生长。
Preparation method of high-pressure-resistant and impact-resistant aluminum oxide ceramic nanofiltration membrane support
The invention discloses a preparation method of a high-pressure-resistant and impact-resistant alumina ceramic nanofiltration membrane support, which comprises the following steps: firstly, uniformly wrapping the surfaces of alumina ceramic particles with nanoparticles by adopting a high-pressure hydrothermal method, and filling crack defects in the particles; besides, a microwave low-temperature rapid one-time sintering technology is adopted, a uniform and rapid heating mode is utilized, and the nano zirconium oxide particles are stably and rapidly combined into cracks on the surface of the large-particle aluminum oxide ceramic powder and in the particles by combining the high wave absorbing efficiency of the nano zirconium oxide particles (the efficiency is superior to that of large-particle alpha-aluminum oxide). According to the invention, the problems of desorption, agglomeration and segregation of nano-particles possibly occurring in the subsequent mixing, forming and sintering processes are effectively avoided, so that the defects and non-uniformity of the ceramic membrane support body are reduced. Meanwhile, compared with a traditional heating method, more uniform temperature distribution is achieved through microwave heating, and abnormal agglomeration and growth of nanocrystals are prevented.
本发明公开了一种耐高压抗冲击氧化铝陶瓷纳滤膜支撑体的制备方法，首先采用高压水热法，将纳米粒子均匀地包裹在氧化铝陶瓷颗粒的表面，并填充颗粒内部的裂纹缺陷。此外，本发明采用了微波低温快速一次烧结技术，利用均匀快速的加热方式，结合纳米氧化锆颗粒的高吸波效率(这一效率优于大颗粒α‑氧化铝)，将纳米氧化锆颗粒稳定且迅速地结合到大颗粒氧化铝陶瓷粉体的表面和颗粒内部的裂缝中。本发明有效避免了后续混料、成型及烧结过程中可能出现的纳米颗粒脱附、团聚和偏析问题，从而减少了陶瓷膜支撑体的缺陷和不均匀性。同时，与传统加热方法相比，本发明中的微波加热实现了更均匀的温度分布，防止了纳米晶粒的异常团聚和生长。
Preparation method of high-pressure-resistant and impact-resistant aluminum oxide ceramic nanofiltration membrane support
一种耐高压抗冲击氧化铝陶瓷纳滤膜支撑体的制备方法
QIU ZHUGUO (author) / HONG YUBIN (author) / FANG FULIN (author) / LAN WEIGUANG (author)
2024-12-31
Patent
Electronic Resource
Chinese
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