Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of composite ZrO2-Al2O3 ceramic micro-filtration membrane
The invention discloses a preparation method of a composite ZrO2-Al2O3 ceramic micro-filtration membrane. The method comprises the following steps: (1) burdening zirconia powder and alumina powder, and carrying out ball-milling; (2) adding an additive lanthanum nitrate, and carrying out ball-milling; and (3) forming a film from the milled slurry, drying and sintering. The powder components of the composite membrane layer prepared by the preparation method gradually change; the pore size distribution of the membrane layer is relatively narrow; the thickness of the membrane layer is moderate, so that the micro-filtration membrane has relatively high permeation flux and separation coefficient; the particle size collocation of the powder of a transition membrane layer is reasonable; the surface roughness of the membrane layer is improved; relatively large membrane layer pollution is not easily caused in the actual separation process; zirconia with good chemical stability is utilized in the membrane layer; and the acid and alkali resistance of the membrane layer is improved. The price of the zirconia is higher than that of aluminum oxide, but the amount in preparation of the membrane layer is relatively small; meanwhile, the service life of an inorganic membrane can be prolonged; and the composite ZrO2-Al2O3 ceramic micro-filtration membrane is better than a simple aluminum oxide ceramic membrane or zirconia ceramic membrane in the market at present in performance.
Preparation method of composite ZrO2-Al2O3 ceramic micro-filtration membrane
The invention discloses a preparation method of a composite ZrO2-Al2O3 ceramic micro-filtration membrane. The method comprises the following steps: (1) burdening zirconia powder and alumina powder, and carrying out ball-milling; (2) adding an additive lanthanum nitrate, and carrying out ball-milling; and (3) forming a film from the milled slurry, drying and sintering. The powder components of the composite membrane layer prepared by the preparation method gradually change; the pore size distribution of the membrane layer is relatively narrow; the thickness of the membrane layer is moderate, so that the micro-filtration membrane has relatively high permeation flux and separation coefficient; the particle size collocation of the powder of a transition membrane layer is reasonable; the surface roughness of the membrane layer is improved; relatively large membrane layer pollution is not easily caused in the actual separation process; zirconia with good chemical stability is utilized in the membrane layer; and the acid and alkali resistance of the membrane layer is improved. The price of the zirconia is higher than that of aluminum oxide, but the amount in preparation of the membrane layer is relatively small; meanwhile, the service life of an inorganic membrane can be prolonged; and the composite ZrO2-Al2O3 ceramic micro-filtration membrane is better than a simple aluminum oxide ceramic membrane or zirconia ceramic membrane in the market at present in performance.
Preparation method of composite ZrO2-Al2O3 ceramic micro-filtration membrane
GUO TAO (Autor:in) / HUANG ZHIFENG (Autor:in)
03.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2020
Preparation method for high-toughness Al2O3/3Y-ZrO2 multiphase ceramic
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2022
Al2O3-ZrO2-Y2O3-TiN Nancomposite Ceramic Powder And Preparation Method Thereof
| Europäisches Patentamt | 2020
Al2O3—ZrO2—Y2O3—TiN nanocomposite ceramic powder and preparation method thereof
| Europäisches Patentamt | 2022