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Author(s) |
Nair, S. R.; Purohit, R. D.; Tyagi, A. K.; Sinha, P. K.; Sharma, B. P.
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Ultrafine La(Ca)CrO3 (LCC) powders were prepared through glycine-nitrate gel combustion process. The effect of glycine-tonitrate ratio on batch size, particle size, nature of agglomeration and densification was studied. As-prepared powders when calcined at 700
°C resulted in LCC along with a small amount of
CaCrO4. The primary particle size obtained in case of stoichiometric and fuel-rich precursor was found to be 25–60 and 60–180 nm, respectively. It was found that the final powder had softer agglomerates with increasing glycine-to-nitrate ratio, which in turn improved the sintered density. The powder obtained through fuel-rich precursor could be sintered to
»98% of its theoretical density at 1300
°C without applying any ball milling operation.
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