Processing Slip Preparation

Any process is limited by the materials you start with. Making a device from tape is limited by the quality of the tape. The quality of the tape is limited by the raw materials and how they are prepared into a slip. 

The better your slip is, the better your tape can be, the easier it is to make high-quality, high-yield pieces. Making the best slip isn t the easiest thing in the world, so let s explore materials processing. 

---

CHAPTER 3—MATERIALS PROCESSING SLIP PREPARATION 3.1 Pre-Batching Powder Preparation... 

The slip coating-sintering procedure can be used to make membranes with pore diameters down to about 100-200 A. More finely porous membranes are made by sol-gel techniques. In the sol-gel process slip coating is taken to the colloidal level. Generally the substrate to be coated with the sol-gel is a microporous ceramic tube formed by the slip coating-sintering technique. The solution coated onto this support is a colloidal or polymeric gel of an inorganic hydroxide. These solutions are prepared by controlled hydrolysis of metal salts or metal alkoxides to hydroxides. 

Several processes are used in the porcelain enameling industry regardless of the metal being coated. These processes, discussed below, include preparation of the enamel slip, surface preparation of the base material, and enamel application and firing to fuse the coating to the metal.3 6... 

Metal preparation. This comprises any and all of the metal processing steps preparatory to applying the enamel slip. Usually this includes cleaning, pickling, and applying a nickel flash or chemical coating. 

---