Multifunctional advanced ceramics from preceramic polymers and nano-sized active fillers

Yttrium silicate and oxonitridosilicate luminescent materials from a silicone resin and nano-sized fillers

“…In this atmosphere the ceramic residue of silicones turns from amorphous silica to a silicon oxycarbide (SiOC) amorphous ceramic, known to feature nano-sized graphene-like carbon structures embedded in a silica glass network [5]. The following nitridation and reduction of RE ions are associated to the removal of oxygen in form of CO gas, as previously shown (at higher temperatures) for polymer-derived SiAlON ceramics [1].…”

“…Taking into account the silica yield of MK in oxidative atmosphere (84% [1]), the applied weight proportions, MK/Y 2 O 3 /Eu 2 O 3 = 1/1.5/0.15, correspond to the molecular balance:…”

“…Silicone resins, filled with micro-or nano-sized oxide particles, have been recently introduced as precursors for many types of advanced silicate ceramics [1,2]. Besides evident shaping advantages (silicones may be easily shaped using plastic forming technologies, before ceramic conversion), this novel method allows for very favorable reaction kinetics and significant phase purity of the final ceramics.…”

Preparation and characterization of high temperature SiCN/ZrB2 ceramic composite

“…Directly adding fillers (active or inert) into precursor polymers by physical means to prepare SiCN/filler ceramic composites may be a more simple and efficient method. Research works involving fillers have mainly focused on their volumetric/ geometrical and functional effects [13], whereas less effort has been directed at the influence on high-temperature stability.…”

Colored ceramic foams with tailored pore size and surface functionalization used as spawning plates for fish breeding

“…In contrast to polymers and metals, ceramics offer considerable advantages for serving as spawning substrates due to their excellent chemical and mechanical endurance in combination with the possibility to tailor monomodal and narrow pore size distributions with high open porosities, which are resistant against swelling in liquid media [17][18][19][20][21]. Especially, ceramic foams obtained by direct foaming are attractive as they are easily processed providing reliable pore sizes from mm-to mmscale in combination with an accessible open-cell microstructure [22][23][24][25].…”