Development of multiphase bioceramics from a filler-containing preceramic polymer

Wollastonite Foams From an Extruded Preceramic Polymer Mixed with CaCO3 Microparticles Assisted by Supercritical Carbon Dioxide

“…[13] It is important to comment on the effect of extrusion on the phase development of the processed silicone þ filler mixtures. As in previous experiments with fillers mixed with solutions of MK polymer, [3,7] the CaCO 3 /silicone weight ratio was chosen in order to yield a CaO/SiO 2 molar ratio slightly below 1 (0.93), as this was found to promote the development of the desired phase, i.e. wollastonite (calcium mono-silicate, CaO/ SiO 2 molar ratio equal to 1), without forming secondary phases (with CaO/SiO 2 molar ratio higher than 1).…”

“…[1][2][3][4][5] Unlike most investigations concerning ''active'' fillers, these oxide particles are not intended to react with the gaseous by-products of the conversion of the silicones into ceramics or with the atmosphere of the furnace in which the conversion is conducted, [6] but rather with the main ceramic residue. Such residue, for thermal treatments in oxidative atmosphere, consists of practically pure silica, and possesses a very remarkable reactivity especially when combined with oxide fillers in the form of nanosized particles.…”

3D printed porous β-Ca2SiO4scaffolds derived from preceramic resin and their physicochemical and biological properties

“…For example, Bernardo et al prepared mullite (3Al 2 O 3 ·2SiO 2 ) and forsterite (2MgO∙SiO 2 ) by using a silicone resin loaded with γ-Al 2 O 3 and MgO nanoparticles, respectively [5–7]. In addition, ternary systems such as akermanite (2CaO·MgO·2SiO 2 ) [8], hardystonite (2CaO·ZnO·2SiO 2 ) [9], gehlenite (2CaO∙Al 2 O 3 ∙SiO 2 ) [10], and cordierite (2MgO∙2Al 2 O 3 ∙5SiO 2 ) [11] were also derived from silicone resin loaded with two active fillers.…”

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

“…processing conditions adopted can be found in the published literature. 29,[33][34][35][36][37] After forming, the composite preceramic materials were heat treated in different conditions (air, nitrogen, nitrogen/2% H 2 atmosphere; heating temperature ranging from 800 to 1550 • C; heating rate ranging from 2 to 20 • C/min; dwelling time at temperature ranging from 1 to 4 h) to obtain ceramic materials with the desired composition (oxides or oxynitrides).…”

“…27,28 Recently, we conducted a series of experiments with the aim of producing oxygen-containing advanced engineering ceramics from preceramic polymers and nano-sized oxide fillers. [29][30][31][32][33][34][35][36][37] The oxide fillers react with the decomposition products of the preceramic polymer (pure silica, when processing in air) producing the desired new phases, and their small dimension allows for very favorable reaction kinetics with the formation, in selected conditions, of phase pure ceramics at low temperature. 29,30 This can therefore be considered a novel direction for filler-containing preceramic polymer components, in which the fillers react to give a single phase ceramic material at the same time enabling the production of crack-free bulk components, while retaining (at least to a certain extent) the processability characteristics of preceramic polymers.…”