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Covalently Connected Particles in Green Bodies Fabricated by Tape Casting
Author(s) -
Duran Cihangir,
Sato Kimiyasu,
Hotta Yuji,
Watari Koji
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.01333.x
Subject(s) - covalent bond , thermogravimetric analysis , dissolution , materials science , ceramic , casting , polymer , composite material , chemical engineering , chemistry , organic chemistry , engineering
A novel approach is proposed to connect ceramic particles by means of organic covalent bonding in the green state. SiO 2 particles coated with 3‐aminopropyltriethoxysilane were covalently bonded upon heating to 100°C, using polycarbodiimide in samples prepared by water‐based tape casting. The samples were dried at 100°C for 1 or 6 days and then soaked in water for shape stability and organic dissolution. Infrared measurements showed that organic covalent bonding was complete after drying for 6 days. This sample retained its shape perfectly after the soaking experiment in contrast to a green sample not heat treated at 100°C, which disintegrated very fast upon soaking. Thermogravimetric runs showed that the water‐soaked sample lost less weight as compared with samples not water soaked, showing that polymers from the green bodies could be removed without distorting the shape by the organic covalent bonding mechanism.