| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1644950 | Materials Letters | 2013 | 4 Pages |
•White Si3O3C(3H) ceramics are synthesized from polycarbosilane particles.•Obtained Si3O3C(3H) ceramics show apparent PL under UV excitation.•Obtained materials have (SiO2)3x(SiC)3y(H) chemical composition.•Broad PL spectra consist of short-lived and long-lived components.•Adjustment of oxidation curing condition is necessary to obtain strong PL.
Polycarbosilane powder, formed by a desaturation process, was oxidation-cured at 180–340 °C and pyrolyzed in a hydrogen atmosphere to obtain Si–O–C(–H) ceramics with low carbon contents. FT-IR was used to investigate the progress of the oxidation curing. Suitable curing conditions were found to be 240 °C for 20 h, and the powders obtained after the pyrolysis exhibited intense luminescence under UV irradiation. The chemical compositions of the resulting Si–O–C(–H) ceramics were close to the stoichiometric (SiO2)–x(SiC)–y(H) compositions. The luminescence properties of these Si–O–C(–H) ceramics were analyzed by using time-resolved photoluminescence spectra.
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