ELECTRICAL-CONDUCTIVITY OF CHROMIA-PILLARED ALPHA-ZIRCONIUM PHOSPHATE

Pillaring of the layered structure of alpha-zirconium phosphate by chr omium(III) oxide has been performed by a new method involving preswell ing of the layered substrate by n-propylamine vapours, followed by a c olloidisation in a pH controlled medium, chromium(III) oligomer grafti ng and calcination in N-2 at 673 K. Pure chromia-pillared alpha-zircon ium phosphate and Li+-exchanged derivatives presented enhanced electri cal conductivity in comparison with pristine alpha-zirconium phosphate and much lower activation energies. (C) 1997 Elsevier Science S.A.