کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1477983 991205 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adapting of sol–gel process for preparation of TiB2 powder from low-cost precursors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Adapting of sol–gel process for preparation of TiB2 powder from low-cost precursors
چکیده انگلیسی

Sol–gel process has been used for preparation of low-cost titanium diboride (TiB2) and titanium carbide (TiC) gels and powders. In this process citric acid is used to chelate titanium and boron precursors and ethylene glycol for reaction with this chelate to form organic esters. Thermal behavior of homogeneous gel and relationship between processing parameters and microstructure of powders has been determined. XRD and Raman spectroscopy have been used for a detection of changes during the crystallization. Carbothermal reduction of the gel revealed the formation of TiB2 and TiC at 1200 °C for 2 h. Well shaped ball-like TiC crystals with the particle size about 200 nm and hexagonal plate-like TiB2 grains with the particle size about 2 μm and thickness 200 nm were formed at 1300 °C for 1 h.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 28, Issue 5, 2008, Pages 907–911
نویسندگان
, ,