Facile Carbothermal Reduction Synthesis of ZrB₂Nanoparticles: The Effect of Starting Precursors

Abstract

Zirconium diboride (ZrB 2 ) ceramic nanoparticles were synthesized by using zirconium (IV) complexes as new precursors. The citrate sol-gel process, which included the mixing of ions at the atomic scale, affected hydrolysis reactions and finally led to the formation of the pure phase of the sample. Results showed that the different sizes of ZrB 2 nanocrystals were produced by adjusting four potential chelating agents of bi-and tetradentate (N 2 O 2 donor set) ligands by the sol-gel process during carbothermal reduction.The samples were characterized by TGA, XRD, FTIR, FESEM, and TEM. The results were obtained from microscopic observations indicated that pure and homogeneous ZrB 2 nanostructures have been formed by using 2-hydroxyacetophenone (hap).

The effects of partially or fully linked boron with a cross-linking structure of an organic precursor on the purity and morphology of ZrB2 powder

“…9 According to recent studies, reducing the oxygen content for ZrB 2 powder could lead to a higher density of sintered ZrB 2 -based ceramics 10 and enhance the mechanical properties of ZrB 2 -SiC composites. [11][12][13] In addition, various morphologies of ZrB 2 powders have been obtained, such as equiaxed, [14][15][16][17][18][19] ake-like, [20][21][22][23][24] and rod-like. 9,25,26 Flake-like and rod-like ZrB 2 particles can enhance the mechanical properties of ZrB 2 -based composite ceramics.…”