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A platform for research: civil engineering, architecture and urbanism
Preparation method of high-pressure-resistant and corrosion-resistant alumina ceramic nanofiltration membrane support
The invention discloses a preparation method of a high-pressure-resistant corrosion-resistant aluminum oxide ceramic nanofiltration membrane support, which comprises the following steps: firstly, uniformly wrapping the surfaces of aluminum oxide ceramic particles with nano particles by adopting a high-pressure hydrothermal method, and filling the nano particles into crack defects in the particles; then, a microwave low-temperature rapid one-time sintering method is adopted, a uniform and rapid heating mode is utilized, and the wave absorbing efficiency of the nanometer amorphous aluminum oxide particles is higher than that of the large-particle alpha-aluminum oxide, so that the nanometer aluminum oxide particles are stably and rapidly combined into the surface and internal cracks of the large-particle aluminum oxide ceramic powder. According to the method, the phenomena of desorption, agglomeration and segregation of nano-particles possibly occurring in the subsequent mixing, forming and sintering processes are effectively avoided, and the phenomena possibly cause defects and non-uniformity of the ceramic membrane support body. Meanwhile, compared with a traditional heating method, the microwave heating in the invention avoids the problems of uneven temperature distribution and abnormal agglomeration and growth of nanocrystals.
本发明公开了一种耐高压抗腐蚀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，并填充到颗粒内部的裂纹缺陷中；接着，采用微波低温快速一次烧结方法，利用均匀快速的加热方式，以及纳米无定型氧化铝颗粒相较于大颗粒α‑氧化铝更高的吸波效率，将纳米氧化铝颗粒稳定而迅速地结合到大颗粒氧化铝陶瓷粉体的表面和内部裂缝中。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、团聚和偏析现象，这些现象可能导致陶瓷膜支撑体出现缺陷和不均匀性。同时，与传统加热方法相比，本发明中的微波加热避免了温度分布不均和纳米晶粒异常团聚长大的问题。
Preparation method of high-pressure-resistant and corrosion-resistant alumina ceramic nanofiltration membrane support
The invention discloses a preparation method of a high-pressure-resistant corrosion-resistant aluminum oxide ceramic nanofiltration membrane support, which comprises the following steps: firstly, uniformly wrapping the surfaces of aluminum oxide ceramic particles with nano particles by adopting a high-pressure hydrothermal method, and filling the nano particles into crack defects in the particles; then, a microwave low-temperature rapid one-time sintering method is adopted, a uniform and rapid heating mode is utilized, and the wave absorbing efficiency of the nanometer amorphous aluminum oxide particles is higher than that of the large-particle alpha-aluminum oxide, so that the nanometer aluminum oxide particles are stably and rapidly combined into the surface and internal cracks of the large-particle aluminum oxide ceramic powder. According to the method, the phenomena of desorption, agglomeration and segregation of nano-particles possibly occurring in the subsequent mixing, forming and sintering processes are effectively avoided, and the phenomena possibly cause defects and non-uniformity of the ceramic membrane support body. Meanwhile, compared with a traditional heating method, the microwave heating in the invention avoids the problems of uneven temperature distribution and abnormal agglomeration and growth of nanocrystals.
本发明公开了一种耐高压抗腐蚀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，并填充到颗粒内部的裂纹缺陷中；接着，采用微波低温快速一次烧结方法，利用均匀快速的加热方式，以及纳米无定型氧化铝颗粒相较于大颗粒α‑氧化铝更高的吸波效率，将纳米氧化铝颗粒稳定而迅速地结合到大颗粒氧化铝陶瓷粉体的表面和内部裂缝中。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、团聚和偏析现象，这些现象可能导致陶瓷膜支撑体出现缺陷和不均匀性。同时，与传统加热方法相比，本发明中的微波加热避免了温度分布不均和纳米晶粒异常团聚长大的问题。
Preparation method of high-pressure-resistant and corrosion-resistant alumina ceramic nanofiltration membrane support
一种耐高压抗腐蚀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
| European Patent Office | 2024
| European Patent Office | 2024
Corrosion resistant alumina ceramic and preparation method thereof
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