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New Route to Synthesize Ultra‐Fine Zirconium Diboride Powders Using Inorganic–Organic Hybrid Precursors
Author(s) -
Yan Yongjie,
Huang Zhengren,
Dong Shaoming,
Jiang Dongliang
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.01269.x
Subject(s) - zirconium diboride , crystallite , materials science , zirconium , cubic zirconia , thermogravimetric analysis , boric acid , chemical engineering , scanning electron microscope , boron , transmission electron microscopy , inorganic chemistry , nuclear chemistry , metallurgy , nanotechnology , composite material , organic chemistry , chemistry , ceramic , engineering
Ultra‐fine zirconium diboride (ZrB 2 ) powders have been synthesized using inorganic–organic hybrid precursors of zirconium oxychloride (ZrOCl 2 ·8H 2 O), boric acid, and phenolic resin as sources of zirconia, boron oxide, and carbon, respectively. The reactions were substantially completed at a relatively low temperature (∼1500°C). The synthesized powders had a smaller average crystallite size (<200 nm), a larger specific surface area (∼32 m 2 /g), and a lower oxygen content (<1.0 wt%), which were superior to some commercially available ZrB 2 powders. The thermodynamic change in the ZrO 2 –B 2 O 3 –C system was mainly studied by thermogravimetric and differential thermal analysis. The crystallite size and morphology of the synthesized powders were characterized by transmission electron microscopy and scanning electron microscopy.