Ca0.5Sr0.5Zr4P6O24 and Ba1.25Zr4P5.5Si0.5O24 compositions, which belong to the [NZP] family of low-thermal-expansion materials, were synthesized by the combustion reaction method using urea as a fuel and NH4NO3 as an oxidizer. The combustion method is a highly exothermic reaction often referred to as self-propagating high-temperature synthesis. The raw materials used were metal zirconates and fine ZrO2 powders. An earlier-described combustion method using metal nitrates, zirconium oxynitrate, and ammonium dihydrophosphate to synthesize [NZP] compounds was modified in the present study by replacing these costly raw materials with less-expensive oxides. The reactivity of different combinations of raw materials also is discussed.
|Number of pages
|Journal of the American Ceramic Society
|Published - Jul 1998
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry