Presentation on theme: "Ceramic Paper. The fabrication of the pre-ceramic paper (1) Preparation of an aqueous feed suspension containing filler and wood pulp or cellulosic."— Presentation transcript:
The fabrication of the pre-ceramic paper (1) Preparation of an aqueous feed suspension containing filler and wood pulp or cellulosic fiber. (2) Coagulation of the fiber and filler in the suspension using polymeric additives, and (3) Formation of the paper sheet by dewatering the feedstock.
Intra- and intermolecular hydrogen bonds in two adjacent cellulose molecules (according to Klemm et al.22).
Structure of the pulp fibers used in paper making a) model of the cell wall structure b) Macroscopic habitus of pulp fibers
Schematic representation of pre-ceramic paper sheet manufacturing.
Composition of Al2O3- and SiC-filled Preceramic Paper in Comparison with Common Writing Paper Filler (CaCO3)- loaded writing paper Al2O3 preceramic paperw SiC preceramic paperw Filler content (wt%) 20–30 83 80 Mean particle size (mm 0.5–2 0.8 4.5 Porosity (%) 30–50 40 47 Sheet thickness (mm) 110 200 240 Areal density (g/m2) 80 350 310
Al2O3- and SiC-filled preceramic papers Al2O3SiC
The typical compositions of a pre-ceramic paper compared with conventional writing paper.
Singaporean Yong Jieyu’s ceramic paper speakers (actually, they’re less speaker than amplifier) are made from clay, one of the best materials for sound amplification thanks to its low sound absorbent coefficiency and recycled music scores. Place your earphone inside each “speaker” and your tunes can be heard by all. The speakers are just a part of the research project into Noise/Sound that he is doing as part of his Masters degree at the Design Academy in Eindhoven. Paper Ceramic Loudspeakers