Our website is currently undergoing maintenance. Article records and full texts remain available. Submissions can be made through the Editorial Manager.

Synthesis and Characterization of a Boron-Containing Precursor for ZrB₂ Ceramic

X. Y. Tao, Z. Xiang, S. Zhou, Y. Zhu, W. Qiu, T. Zhao

Journal of Ceramic Science and Technology, Vol. 7, No. 1 (2016), pp. 107-112

DOI: 10.4416/JCST2015-00041

Download full article (PDF)

Abstract

A precursor for ZrB2 ceramic was successfully synthesized in a chemical reaction between polyzirconoxanesal (PZS) and boric acid. The molecular structure of the precursor, thermal properties and the pyrolysis behavior of the precursor were investigated. The results showed that the as-synthesized precursor was a polymer based on Zr-O-C-B bonds. The precursor was stable in air atmosphere and soluble in common organic solvents. The ceramic yield of the precursor at 1200 °C was around 65.5 % under N2 atmosphere. The derived ceramics obtained at 1200 °C were composed of B2O3, ZrO2 and carbon. When the temperature was increased up to 1300 °C, peaks of ZrC emerged owing to carbothermal reduction. m-ZrO2 and t-ZrO2 disappeared when the pyrolysis temperature was increased to above 1400 °C. ZrB2 became the predominant phase when the pyrolysis temperature was increased up to 1500 °C.

Keywords

Zirconium diboride, preceramic polymers, boric acid, precursor infiltration pyrolysis

View this issue · Article & DOI index