公开(公告)号：EP0583733A1

公开(公告)日：1994-02-23

申请号：EP93112901.9

申请日：1993-08-12

申请人： Hoogovens Industrial Ceramics B.V.

发明人： de Jong, Remco ,  Westra, Marlies ,  Visser, Hendrikus Hylke ,  Wittebrood, Adrianus Jacobus

IPC分类号： B01D71/02

CPC分类号： B01D63/062 ,  B01D71/02 ,  B01D2323/12 ,  B01D2325/04 ,  C04B41/009 ,  C04B41/52 ,  C04B41/89 ,  C04B2111/00801 ,  C04B41/4922 ,  C04B41/463 ,  C04B41/4539 ,  C04B41/4803 ,  C04B41/5031 ,  C04B2111/00112 ,  C04B35/00 ,  C04B38/00

摘要： In the manufacture of a ceramic membrane for micro-filtration having a porous ceramic carrier and a ceramic micro-filtration coating on a bulk surface of said carrier, the steps are performed of

(i) silanising said carrier at least at said bulk surface thereof,
(ii) after step (i), applying a coating film containing metal oxide to said bulk surface of said carrier by contacting a stable suspension of non-agglomerated metal oxide particles with said bulk surface and moving said suspension along said bulk surface, so that said coating film remains adhering to said bulk surface, and
(iii) drying and heating said carrier and said coating film thereon, so as to sinter at least said coating film and thereby form said micro-filtration coating on said carrier.
In order to improve the uniformity and evenness of the coating film of the suspension, the stable suspension contains an organic additive which increases the yield stress of the stable suspension to a value greater than zero. The organic additive is one which is capable of giving said stable suspension a yield stress of at least 0.1 Pa at a concentration of not more than 5% by weight of the liquid component of the suspension without causing agglomeration of the particles.

摘要翻译： 在制造具有多孔陶瓷载体的陶瓷膜和在所述载体的体表面上的陶瓷微过滤涂层的陶瓷膜的步骤中，至少在其所述体积表面上进行（i）使所述载体硅烷化， （ii）在步骤（i）之后，通过使非附聚金属氧化物颗粒的稳定悬浮液与所述体表面接触并沿所述体表面移动所述悬浮液，将含有金属氧化物的涂膜施加到所述载体的所述体表面，使得 所述涂膜保持粘附到所述体表面，和（iii）在其上干燥和加热所述载体和所述涂膜，以便至少烧结所述涂膜，从而在所述载体上形成所述微过滤涂层。 为了提高悬浮液的涂膜的均匀性和均匀性，稳定的悬浮液含有有机添加剂，其将稳定悬浮液的屈服应力提高到大于零的值。 有机添加剂是能够使稳定的悬浮液的屈服应力为至少0.1Pa的浓度，其浓度不超过悬浮液的液体组分的5重量％，而不会引起颗粒的团聚。