minimizing borosilicate glass solubility in water

I'm working with a finely crushed borosilicate glass in water for a
coating experiment. The high surface area of the glass powder allow
the electrical conductivity of the liquid to rise above desirable
levels, due to the solubility of the boron, silica,and sodium in the
frit. The current pH is around 9.2.

I would like to minimize conductivity for a long time (>3 hrs) without
resorting to larger particle sizes.

Is there something I can add in the water to inhibit glass dissolution
(through surface adsorption)? What elements in the frit would be
helpful?
I get into a problem below 7.5 ph because of the ppt of the binders.

"Jared" <[Only registered users see links. ]> wrote in message
news:36cdf075.0310231021.18bfe00b@posting.google.c om...

Can you work with quartz powder? If it has to be glass powder, I'm afraid
you have to live with the properties of that material. A coating might
help, but that would seem to negate the purpose of your experiment.