Synthesis and Characterization of TiB2 Nanoparticles by Sol-Gel Method
Subject Areas :Abolhassan Najafi 1 , Gholamreza Khalaj 2 , Farzad Soleymani 3
1 - Department of Materials Engineering, Saveh Branch, Islamic Azad University, Saveh, Iran.
2 - Department of Materials Engineering, Saveh Branch, Islamic Azad University, Saveh, Iran.
3 - Department of Engineering, Payame Noor Unvierstiy, Tehran, Iran
Keywords: titanium diboride, synthesis, sol-gel, nanoparticles, mesoporous,
Abstract :
In this research, TiB2 particles were synthesized through the sol-gel method in nanometer dimensions. First, sol was prepared in the four-component system of alkoxide-dispersant-water-solvent based on the sol-gel chemical process under acidic conditions. Titanium tetraisopropoxide and trimethyl borate were used as raw materials. After the process of hydrolysis and gel formation and following heat treatment, TiB2 nano powder product was prepared. SEM, TEM, DTA/TG, XRD, Raman, and FTIR analysis methods were used to evaluate the mechanism of product formation in the sol-gel process. FTIR data showed that the powder prepared at the temperature of 900 ºC has bonds containing boron and titanium, and bonds containing carbon were identified in the wave number range of 600-1650 cm-1. DTA analysis showed that the initial buds of TiB2 particles were formed in the range of 1300 ºC. The formation of the TiB2 crystalline phase was confirmed in X-ray diffraction pattern studies, and this phase was completed by increasing the temperature to 1430 ºC. The surface analysis of the synthesized particles revealed the specific surface area of 153.42 m²/g with porous surfaces and meso dimensions. Raman results showed the presence of Ti-B in the final product. PSA results showed that the particle size distribution is below 50 nm. The microstructure images of SEM and TEM showed that the synthesized TiB2 particles were in the range below 100 nm with a narrow and uniform distribution range.
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