I want to dissolve a kind of SiO2-based glass (with more than 70% wt SiO2). As far as I know, HF acid is the best option for dissolving the silica but it is expensive. Are there any other materials to do so? The dissolution process should be fast.
Does HF acid works on glassy deposits inside alumina crucibles? is there any other technique besides HF acid?
Best regards...
It should work; a mixture with sulphuric acid may be necessary! Take the greatest care: HF is really a dangerous gas - use it only inside ventilated niches and take care HF does corrode ceramic materials, sometimes used inside niches. Do not inhale the fumes!
You can dissolve many silicate glasses by boiling in HCl, and it's considerably less hazardous (although still hazardous!) than dissolving in HF. Ensure you take all the necessary safety precautions and do it in a fume cupboard.
Flux the glass with lithium or sodium metaborate and dissolve it in water.
Is there possibility to dissolve silica without using HF and still remains its physical and chemical properties
A fresh dispersion of NPs was disaggregated by ultrasonication after dilution with sterile physiological (0.9% NaCl) saline at 37°C immediately before use.
Still open....
You can dissolve silica with hot *concentrated* sodium or potassium hydroxide solution. This will dissolve alumina as well, as HF does too. HF is much better mixed with HCl, H2SO4 or HNO3. Be careful using HF.
Interesting comment about HF working better if mixed with HCl, H2SO4,... What does the other acid do to help? I think you are right, I just do not understand how it helps. Thx Tom
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