Abstract
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.
Original language | English |
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Pages (from-to) | 4549-4557 |
Number of pages | 9 |
Journal | Journal of the European Ceramic Society |
Volume | 44 |
Issue number | 7 |
DOIs | |
Publication status | Published - Jul 2024 |
Bibliographical note
Publisher Copyright:© 2024 Elsevier Ltd
Funding
This work was financially supported by the Natural Science Foundation of Jiangsu Province (Grant Nos. BK20200898 ).
Funders | Funder number |
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Natural Science Foundation of Jiangsu Province | BK20200898 |
Keywords
- Carbothermal reduction
- Low-temperature synthesis
- Microwave assistance
- Spark plasma sintering
- Titanium diboride