An ammonium polyphosphate composite with high ionic conductivity was prepar
ed. A thermal gravimetric analysis was performed. Investigations by impedan
ce spectroscopy were carried out in dry and humid atmospheres. The conducti
vity was found to be remarkably high in a water-rich environment (less than
or equal to 0.1 S cm(-1) at 573 K). (C) 1999 Published by Elsevier Science
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