Seeded silicon nitride powders obtained by carbothermal reduction—nitridation of diatomite and various sources of carbon
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2023
Authors
Šaponjić, Aleksandra
Ilić, Svetlana

Barudžija, Tanja

Radosavljević-Mihajlović, Ana S.

Kokunešoski, Maja

Matović, Branko

Article (Published version)

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In this paper, the effects of the addition of silicon nitride seeds on the phase composition, particle size, and shape of silicon nitride powders obtained by carbothermal reduction-nitridation were studied. Environmentally friendly natural raw material, diatomaceous earth, was used as a Si precursor. Three different carbon sources were used: activated carbon, carbonized sucrose, and carbon cryogel as reducing agents in the molar ratio C/SiO2 = 5. To obtain better-quality Si3N4 powder, the commercial α-Si3N4 powder was added into starting mixtures as seeds in four different quantities. The X-ray diffraction, specific surface area, infrared spectroscopy with Fourier transform, and scanning electron microscopy were employed to characterize the obtained powders. Sucrose as a carbon source enables a major reduction of SiO2 and the onset of β-Si3N4 crystallization at a lower temperature (1350 °C) as well as the complete absence of diatomaceous earth relics. It indicates that the carbothermal... reduction-nitridation takes place faster in contrast to the other two carbon sources.
Keywords:
Carbothermal reduction / Diatomaceous earth / Nitridation / Seeds / Silicon nitrideSource:
Journal of the Australian Ceramic Society, 2023, InPressFunding / projects:
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VinčaTY - JOUR AU - Šaponjić, Aleksandra AU - Ilić, Svetlana AU - Barudžija, Tanja AU - Radosavljević-Mihajlović, Ana S. AU - Kokunešoski, Maja AU - Matović, Branko PY - 2023 UR - https://vinar.vin.bg.ac.rs/handle/123456789/10852 AB - In this paper, the effects of the addition of silicon nitride seeds on the phase composition, particle size, and shape of silicon nitride powders obtained by carbothermal reduction-nitridation were studied. Environmentally friendly natural raw material, diatomaceous earth, was used as a Si precursor. Three different carbon sources were used: activated carbon, carbonized sucrose, and carbon cryogel as reducing agents in the molar ratio C/SiO2 = 5. To obtain better-quality Si3N4 powder, the commercial α-Si3N4 powder was added into starting mixtures as seeds in four different quantities. The X-ray diffraction, specific surface area, infrared spectroscopy with Fourier transform, and scanning electron microscopy were employed to characterize the obtained powders. Sucrose as a carbon source enables a major reduction of SiO2 and the onset of β-Si3N4 crystallization at a lower temperature (1350 °C) as well as the complete absence of diatomaceous earth relics. It indicates that the carbothermal reduction-nitridation takes place faster in contrast to the other two carbon sources. T2 - Journal of the Australian Ceramic Society T1 - Seeded silicon nitride powders obtained by carbothermal reduction—nitridation of diatomite and various sources of carbon IS - InPress DO - 10.1007/s41779-023-00876-w ER -
@article{ author = "Šaponjić, Aleksandra and Ilić, Svetlana and Barudžija, Tanja and Radosavljević-Mihajlović, Ana S. and Kokunešoski, Maja and Matović, Branko", year = "2023", abstract = "In this paper, the effects of the addition of silicon nitride seeds on the phase composition, particle size, and shape of silicon nitride powders obtained by carbothermal reduction-nitridation were studied. Environmentally friendly natural raw material, diatomaceous earth, was used as a Si precursor. Three different carbon sources were used: activated carbon, carbonized sucrose, and carbon cryogel as reducing agents in the molar ratio C/SiO2 = 5. To obtain better-quality Si3N4 powder, the commercial α-Si3N4 powder was added into starting mixtures as seeds in four different quantities. The X-ray diffraction, specific surface area, infrared spectroscopy with Fourier transform, and scanning electron microscopy were employed to characterize the obtained powders. Sucrose as a carbon source enables a major reduction of SiO2 and the onset of β-Si3N4 crystallization at a lower temperature (1350 °C) as well as the complete absence of diatomaceous earth relics. It indicates that the carbothermal reduction-nitridation takes place faster in contrast to the other two carbon sources.", journal = "Journal of the Australian Ceramic Society", title = "Seeded silicon nitride powders obtained by carbothermal reduction—nitridation of diatomite and various sources of carbon", number = "InPress", doi = "10.1007/s41779-023-00876-w" }
Šaponjić, A., Ilić, S., Barudžija, T., Radosavljević-Mihajlović, A. S., Kokunešoski, M.,& Matović, B.. (2023). Seeded silicon nitride powders obtained by carbothermal reduction—nitridation of diatomite and various sources of carbon. in Journal of the Australian Ceramic Society(InPress). https://doi.org/10.1007/s41779-023-00876-w
Šaponjić A, Ilić S, Barudžija T, Radosavljević-Mihajlović AS, Kokunešoski M, Matović B. Seeded silicon nitride powders obtained by carbothermal reduction—nitridation of diatomite and various sources of carbon. in Journal of the Australian Ceramic Society. 2023;(InPress). doi:10.1007/s41779-023-00876-w .
Šaponjić, Aleksandra, Ilić, Svetlana, Barudžija, Tanja, Radosavljević-Mihajlović, Ana S., Kokunešoski, Maja, Matović, Branko, "Seeded silicon nitride powders obtained by carbothermal reduction—nitridation of diatomite and various sources of carbon" in Journal of the Australian Ceramic Society, no. InPress (2023), https://doi.org/10.1007/s41779-023-00876-w . .