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High Microwave Susceptibility of NaH2PO4·2H2O: Rapid Synthesis of Crystalline and Glassy Phosphates with NASICON-Type Chemistry

✍ Scribed by B. Vaidhyanathan; K.J. Rao

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
228 KB
Volume
132
Category
Article
ISSN
0022-4596

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✦ Synopsis

High microwave susceptibility of NaH 2 PO 4 •2H 2 O has been discovered. This hydrated acid phosphate of sodium can be heated upto 1000 K or more when exposed to 2.45 GHz microwaves. Using this, a novel microwave-assisted preparation of a number of important crystalline and glassy materials with NASICON-type chemistry has been accomplished in less than 8 min which is only a fraction of the time required for conventional synthetic procedures. The present single-shot approach to the preparation of phosphates is attractive in terms of its simplicity, rapidity, and general applicability. A ''step-ladder'' heating mechanism has been proposed to account for the high microwave absorbing ability of NaH 2 PO 4 •2H 2 O.

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