Synthesis and growth behavior of micron-sized rod-like ZrB2 powders
Source abstract
Abstract
Abstract Using ZrOCl 2 ·8H 2 O, Na 2 B 4 O 7 ·10H 2 O and C 12 H 22 O 11 as raw materials, micron-sized rod-like ZrB 2 powders were prepared via a molten-salt-mediated carbothermal reduction from chemically homogenous precursors obtained by sol-gel method. The effects of Zr/B/C molar ratio, firing temperature, holding time and molten salt on the composition of products have been investigated, respectively. Pure micron-sized ZrB 2 powders with controllable rod-like morphology were obtained at 1400 °C for 4 h holding with Zr/B/C of 1/5/5 in presence of molten salt, which has a diameter of 1–2 µm and aspect ratios of 3–10. The investigation of growth behavior showed that at the first stage, nano-size ZrB 2 columns grew along the c -axis with ZrC x thin film on their top as “active-site”. Then, with consuming ‘active sites’, ZrB 2 columns started to grow in diameter direction, and finally small columns merged into a larger rod.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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