Preparation of pyrophosphates

Details Preparation of pyrophosphates Preparation of pyrophosphates

1975-02-07

1976-08-17

Padgett, Benjamin R.

Compositions

Electrically conductive or emissive compositions

Metal compound containing

252500, 252518, 252521, 252950, 252951, 423305, H01B 106

Patent

active

039753085

ABSTRACT:
A method for the preparation of pyrophosphates such as SiP.sub.2 O.sub.7 is disclosed, whereby the undesired formation of by-products such as Si.sub.2 P.sub.2 O.sub.9 is minimized. Such pyrophosphates are particularly suitable for the formation of solid semi-conductor diffusion sources, wherein the presence of by-product is seriously detrimental.

REFERENCES:
patent: 3849344 (1974-11-01), McMurtry et al.
patent: 3852086 (1974-12-01), Murata et al.
Chemical Abstracts, vol. 68 (1968), 45850x, "Microscopic Study of Products of the Reaction of Silica with Orthophosphoric Acid."

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