Investigation of the Viscosity of the Binary System Na₂B₄O₇–NaH₂PO₄in the Fused State

JSGT 1934 V18 T201-T208

Employing a rotating cylinder viscometer the viscosities of Na₂B₄O₇–NaH₂PO₄ mixtures were determined from 527° to 920°. The viscosity of fused borax ranged from 3·30 poises at 880°to 83,750 at 590°, and for a mixture containing 25% Na₂B₄O₇, 75%. NaH₂PO₄ the values were 15·7 poises at 732° and 38,370 at 532°. There was no indication of the formation of any intermediate complex compounds.

M. Volarovich