Low-temperature synthesis and sinterability of high-purity submicron TiB2 powder via microwave-assisted carbothermal reduction

Xin Li*, Bin Chen, Jia Qiao, Jian Tang, Filiz Cinar Sahin, Onuralp Yucel

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Özet

Microwave-assisted carbothermal reduction has been innovatively developed for the low-temperature synthesis of high-purity submicron TiB2 powders. The thermodynamic research of TiO2-B4C-C system and relevant reactions showed that suitable excess addition of B4C was required to compensate for the boron source evaporation loss. The effect of excess addition of B4C (0 −15 wt%) and synthesis temperature (1350 −1550 °C) on the phase composition, purity, and morphology of the products have been investigated. Submicron TiB2 powders (0.75 µm) with high-purity (0.36% residual C and 0.53% O) were successfully synthesized at 1450 °C for 20 min under microwave assistance with TiO2, excess 5 wt% B4C, and carbon black. Additionally, the as-synthesized TiB2 powders after spark plasma sintering at 2000 °C for 15 min showed a relatively higher sinterability, namely increased at 7.7% relative density of sintered ceramic when compared with the commercially available powders owing to the lower O content and submicron-scale size.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)4549-4557
Sayfa sayısı9
DergiJournal of the European Ceramic Society
Hacim44
Basın numarası7
DOI'lar
Yayın durumuYayınlandı - Tem 2024

Bibliyografik not

Publisher Copyright:
© 2024 Elsevier Ltd

Finansman

This work was financially supported by the Natural Science Foundation of Jiangsu Province (Grant Nos. BK20200898 ).

FinansörlerFinansör numarası
Natural Science Foundation of Jiangsu ProvinceBK20200898

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