Difference between revisions of "Tape Casting"
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== Components of a tape caster == | == Components of a tape caster == | ||
=== Tape casting machine === | === Tape casting machine === | ||
− | Tape casting machines are assembled in different scales. Usually big industrial companies have continuous tape casters with a length of several hundred meters. However, in academic research much smaller lab-scale tape caster are used which can range from half a meter to several meters in length. [[File:Tape casting machine.png|thumb|Lab-scale doctor-blade tape caster. The slurry is poured into the reservoir before starting to cast.]] | + | Tape casting machines are assembled in different scales. Usually big industrial companies have continuous tape casters with a length of several hundred meters. However, in academic research much smaller lab-scale tape caster are used which can range from half a meter to several meters in length. [[File:Tape casting machine.png|thumb|Lab-scale doctor-blade tape caster. The slurry is poured into the reservoir before starting to cast.]] Continuous as well as discontinuous tapes can be prepared with lab-scale tape casters. For continuous tapes, guide rollers and rollers with the carrier substrate are needed. If discontinuous tapes are produced, carrier substrate sheets can be used likewise. |
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+ | === Carrier substrate === | ||
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[[File:Schematic doctor blading.png|thumb|Schematic of the doctor-blade tape casting technique. The slip is poured in a reservoir and cast on a carrier. The doctor-blade height defines the green sheet's thickness.<ref>[https://doi.org/10.1007/978-94-011-0531-6_5] Mistler, R.E. (1995), The principles of tape casting and tape casting applications. In: Terpstra, R.A., Pex, P.P.A.C., de Vries, A.H. (eds) Ceramic Processing. Springer, Dordrecht.</ref>]] | [[File:Schematic doctor blading.png|thumb|Schematic of the doctor-blade tape casting technique. The slip is poured in a reservoir and cast on a carrier. The doctor-blade height defines the green sheet's thickness.<ref>[https://doi.org/10.1007/978-94-011-0531-6_5] Mistler, R.E. (1995), The principles of tape casting and tape casting applications. In: Terpstra, R.A., Pex, P.P.A.C., de Vries, A.H. (eds) Ceramic Processing. Springer, Dordrecht.</ref>]] | ||
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=== Doctor-blade === | === Doctor-blade === | ||
=== Drying chamber === | === Drying chamber === | ||
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== Process of tape casting == | == Process of tape casting == | ||
=== Slip delivery === | === Slip delivery === |
Revision as of 15:53, 27 October 2022
One of the most well-known and used method to manufacture multilayered ceramic components is the doctor-blade tape casting technique. Glenn N. Howatt is regarded as the godfather of tape casting and established this processing method in 1947[1] and also filed the first patent in 1948[2]. A plentiful variety of electronic components like multilayer ceramic capacitors (MLCC), actuators (MLA), varistors (MLV) or tapes for low/high temperature cofired ceramics (LTCC, HTCC) can be manufactured.
Contents
Components of a tape caster
Tape casting machine
Tape casting machines are assembled in different scales. Usually big industrial companies have continuous tape casters with a length of several hundred meters. However, in academic research much smaller lab-scale tape caster are used which can range from half a meter to several meters in length.
Continuous as well as discontinuous tapes can be prepared with lab-scale tape casters. For continuous tapes, guide rollers and rollers with the carrier substrate are needed. If discontinuous tapes are produced, carrier substrate sheets can be used likewise.
Carrier substrate
![](/ceramics/images/thumb/9/99/Schematic_doctor_blading.png/300px-Schematic_doctor_blading.png)
Reservoir
Doctor-blade
Drying chamber
Process of tape casting
Slip delivery
Casting
Drying
Quality assessment
optical check, bubbles, orange peel, cracking, homogeneity, bendable, strechable, handable, homogeneous green sheet thickness, green density
References
- ↑ [1] Howatt, G.N., Breckenridge, R.G. and Brownlow, J.M. (1947), FABRICATION OF THIN CERAMIC SHEETS FOR CAPACITORS. Journal of the American Ceramic Society, 30: 237-242.
- ↑ [2] Howatt, G.N., Method of Producing High Dielectric High Insulation Ceramic Plates, U.S. Patent 2,582,993 (filed October 29, 1948).
- ↑ [3] Mistler, R.E. (1995), The principles of tape casting and tape casting applications. In: Terpstra, R.A., Pex, P.P.A.C., de Vries, A.H. (eds) Ceramic Processing. Springer, Dordrecht.