Carbon-rich SiCN ceramics derived from phenyl-containing poly(silylcarbodiimides)

Mera, Gabriela; Riedel, Ralf; Poli, Fabrizia; Müller, Klaus

doi:10.1016/j.jeurceramsoc.2009.03.026

Cited by 151 publications

(169 citation statements)

References 40 publications

(71 reference statements)

Supporting

Mentioning

151

Contrasting

Order By: Relevance

“…12 (b)], both the SDC:Eu 3+ and the recovered reaction mixture exhibited characteristic emission of Eu 3+ due to the ff transition. The intense peak at 593 nm detected for the both samples was due to the 5 34) The PL red emission ( ex. = 254 nm) of the complex could be successfully achieved by the sufficient absorption at around 254 nm of the bis(trimethylsilyl)carbodiimide which could be a counterpart of EuCl 3 in the complex.…”

Section: ¹1mentioning

confidence: 96%

See 1 more Smart Citation

Synthesis and characterization of luminescent properties of ceramics derived from polysilylcarbodiimides

Shimokawa

Fujiwara

Ionescu

et al. 2014

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

The luminescence properties related to the thermal polymer/ceramic conversion behavior of silicon dicarbodiimide {SDC, [Si(N=C=N) 2 ] n } have been investigated. SDC was synthesized by the non-oxidic solgel condensation reaction of silicon tetrachloride with bis(trimethylsilyl)carbodiimide. As-synthesized SDC showed no luminescence under UV light, while heat-treated SDC showed an appreciable photoluminescence (PL) and the maximum visible PL emission intensity was achieved by heat treatment at 400°C. Even after the heat treatment up to 970°C, the SDC preserved most of the N=C=N groups to keep whitish gray color without distinct free carbon formation, and emitted visible blue luminescence. The 400°C-heat treated SDC exhibited the intense luminescence excited at 281 and 379 nm wavelengths, while there was no PL emission excited by the N=C=N groupderived host absorption at 214 nm. The PL properties of the heat-treated SDCs could be correlated with their preservation of the local structure including N=C=N groups and defects formation during the heat treatment. Moreover, Eu 3+ -modified SDC was prepared by the same solgel method using Eu(III) chloride as the Eu 3+ -source. The results of Si NMR spectroscopic analyses revealed a complex formation between the Eu(III) chloride and bis(trimethylsilyl)carbodiimide. As a result, the Eu 3+ -modified SDC exhibited a characteristic PL red emission at around 600 nm attributed to the f-f-transition of Eu .

show abstract

Section: ¹1mentioning

confidence: 96%

“…4), 5) These findings indicate that the amorphous SiCN ceramics are good candidates for high temperature applications.…”

Section: Introductionmentioning

confidence: 91%

Synthesis and characterization of luminescent properties of ceramics derived from polysilylcarbodiimides

Shimokawa

Fujiwara

Ionescu

et al. 2014

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is in agreement to observations made in polymer-derived ceramics (i.e., SiCN materials), which were also shown to have an improved crystallization resistance at hightemperatures as the fraction of the segregated carbon phase increases. 24), 25) The TEM image of hot-pressed XF10 is shown in Fig. 10.…”

Section: Synthesis and Characterization Of Rgo/si 3 N 4 Nanocompositesmentioning

confidence: 99%

Synthesis of polymer-derived graphene/silicon nitride-based nanocomposites with tunable dielectric properties

Wang

Mera

Morita

et al. 2016

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

Within the present work, reduced-graphene oxide (rGO)/silicon nitride (Si 3 N 4 ) nanocomposites were prepared upon pyrolysis of a graphene oxide (GO)-filled polysilazane. The novel preparative approach consists in the synthesis of the polysilazane in the presence of different concentrations of GO, yielding a homogeneous GO/polysilazane composite which was subsequently thermally converted in Ar atmosphere into rGO/Si 3 N 4 nanocomposites. Hot-pressing of the obtained nanocomposite powders delivered monolithic rGO/Si 3 N 4 . All prepared samples exhibited the presence of homogeneously dispersed rGO phase within an amorphous or crystalline silicon nitride matrix, as for the as-prepared and hot-pressed samples, respectively. An increasing amount of rGO in the nanocomposites was found to gradually suppress the crystallization of the silicon nitride matrix into ¡-Si 3 N 4 . Moreover, depending on the volume fraction of the graphene phase in the ceramic nanocomposites, different dielectric properties were observed, indicating a facile preparative method to produce materials with tunable electromagnetic waves (EMW) behavior.

show abstract

“…Silicon carbonitride (SiCN) ceramics present excellent oxidation resistance and high temperature mechanical properties (Galusek et al, 2001;Gou et al, 2015;Liu et al, 2015;Mera et al, 2009;Riedel et al, 2006;Saha et al, 2005;Trassl et al, 2002). A main characteristic of SiCN ceramics is their possibility to contain so called free carbon in the microstructure, which is believed to make a major contribution to the performance of SiCN (Galusek et al, 2001;Mera et al, 2009;Riedel et al, 2006;Saha et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…A main characteristic of SiCN ceramics is their possibility to contain so called free carbon in the microstructure, which is believed to make a major contribution to the performance of SiCN (Galusek et al, 2001;Mera et al, 2009;Riedel et al, 2006;Saha et al, 2005). Although current experiments provide some clues about the nano-structure of SiCN, it is still very difficult to ascertain the structure of nano-domains in molecular scale (Saha et al, 2005;Zhang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Predicting structural properties of amorphous silicon carbonitride by atomistic simulation

Liao

Zhang

Raj

et al. 2016

IJMSI

View full text Add to dashboard Cite

Silicon carbonitride (SiCN) has superior mechanical properties at high temperature, but its structural properties in molecular scale are not clear. In this study, atomistic simulations were applied to study the molecular structure of amorphous SiCN. The atomistic structures obtained by large-scale molecular dynamics simulations agree with current experimental results, and moreover, provide more details on molecular structure. The Si-C bonds generally keep stable proportion for all the three cases, which means the additional carbon tends to form free carbon network rather than Si-C bonds. Si-CN 3 is dominant inSi-C/N tetrahedron, and as expected the increase of C content in SiCN tends to form more Si-C 2 N 2 and Si-C 3 N tetrahedra.

show abstract

Carbon-rich SiCN ceramics derived from phenyl-containing poly(silylcarbodiimides)

Cited by 151 publications

References 40 publications

Synthesis and characterization of luminescent properties of ceramics derived from polysilylcarbodiimides

Synthesis and characterization of luminescent properties of ceramics derived from polysilylcarbodiimides

Synthesis of polymer-derived graphene/silicon nitride-based nanocomposites with tunable dielectric properties

Predicting structural properties of amorphous silicon carbonitride by atomistic simulation

Contact Info

Product

Resources

About