Tape-casting process

FIGURE 6.9 Schematic diagram of the tape-casting process for producing a ceramic green film. 

Figure 7.31 Schematic diagram of a typical tape-casting process. From Principles of Ceramics Processing, 2nd edition, by J. S. Reed Copyright 1995 by John Wiley Sons, Inc. This material is used by permission of John Wiley Sons, Inc.

Fig. 3.6 Schematic diagram of the doctor-blade tape-casting process.

Figure 7.26 Tape-casting process. Slip is contained in a reservoir, one side of which has a stationary doctor blade. A moving carrier travels under the doctor blade, carrying with it a uniform layer of slip, which dries to a green tape.

Although tape casting is in many ways similar to slip casting, there are a few important differences. Since the goal is to produce thin—in some cases, extremely thin—sheets, the particulate or powder used to make up the slurry is typically finer than you would see in most slip-casting operations. Second, tape-casting processes typically utilize a nonporous substrate. This necessitates... 

A major difference between the two methods is the process by which the liquid is removed from the slurry. In slip casting, the liquid is removed by capillary suction provided by a porous mold. In contrast, the liquid is removed by evaporation in tape casting. In most tape casting processes, the liquid is nonaqueous because the higher volatility allows faster evaporation. 

Fig. 6 Schematic of a tape casting process used to form thin sheets of ceramic material. The slurry of ceramic particles and carrier fluid flows beneath the doctor blade onto a moving carrier film. As the tape moves down the bed, it dries and is then spooled on a take up reel.

The tape casting process, which is utilized widely in the electronics industry, has been adopted by many MCFC developers. The tape casting process was originally introduced for matrix fabrication, because of its... 

Zr02/SUS316 Functionally Graded Material by Tape Casting process... 

For planar sensors manufactured by multilayer technology, the recently developed ceramic tape casting process was improved further [17, 18]. ZrOz powder is mixed into an organic matrix of binders, plasticizers, and solvents and is tape cast onto a Mylar supporting tape or a steel belt After drying, the ceramic tape is separated from the support tape and the flexible green tape can be punched to form individual substrates. 

FABRICATION OF Ni-GDC ANODE SUBSTRATE BY TAPE CASTING PROCESS... 

Fabrication of Ni-GDC Anode Substrate by Tape Casting Process... 

Fig.l. Schematic illustration of the freeze-tape casting process... 

Fig. 3.9. Schematic representation of the tape casting process (McColm Clark, 1988).

Next to tubes and fibers, tbin ceramic sheets are also a very interesting subject for the development of thermoplastic ceramic extrusion systems. It has been shown that it is feasible to produce ceramic sheets and films with thicknesses under 200 pm. Figure 8 shows a picture of a ceramic sheet made of silicon dioxide nanoparticles. This technique could, for example, be used for the fabrication of multilayer ceramic bodies (e.g. multilayer capacitors, structural laminates) which currently are produced using the tape casting process. Big advantages relative to this conventional process would be the recycleability of the thermoplastic feedstocks and the higher achievable powder loading. 

In addition to describing some of the methods used to apply thick ceramic films to a substrate, we also describe the tape casting process. Films produced by tape casting are not used as coatings but as self-supporting ceramic sheets (down to 25 pm thick) that are widely used in the production of thick-film circuits. 

Parks, J.L., Jr. (1961) Manufacture of Ceramics, U.S. Patent 2,966,719. Patent for the use of polymer film in tape casting process. 

Fig. 4.33 Schematic diagram of the tape casting process. Reproduced with permission from [115]. Copyright 2007, Springer Science + Business Media...

Xiang JH, Huang Y, Xie ZP (2002) Study of gel-tape-casting process of ceramic materials. Mater Sci Eng A—Struct Mater Prop Microstnicture Process 323 336-341... 

Figure 18.19 Schematic of the tape-casting process and the resuiting texture in the sintered ceramic for (a) 001-oriented, piateiet-shaped Bi4Ti30i2 tempiates, and (b) 001-oriented, needieshaped PbNbjOg tempiates. From Ref [89].

Figure 25.7 (a) Rolled material from the ceramic tape casting process (b) channels (diameter d) produced by Integration of fugitive fibers (c) gaps (s) by integration of fugitive strips [21]. 

Fig. 1.2 The basic principle of the tape casting process as it exists in most modern factories.

---