You need the melting temperature of silica. see its properties at "Static and dynamic properties of a viscous silica melt, J Horbach, W Kob - Physical Review B, 1999 - APS" at https://arxiv.org/pdf/cond-mat/9901067
Hi, Silica or Silicon Dioxide melts at over 1700 centigrade and is a major constituent in glass. A very common material in many rocks. Most lab suppliers sell silica in lab ready condition
Silica is basically white sand/quartz and is the primary component of glass. Depends on the composition, the melting point of silica is around 1700 C. Almost 10% of world's crust is composed of silica, which makes the element relatively inexpensive.
If you are looking for a soluble format of Si then I suggest you look at Silicic Acid
If you're looking to digest silica, you will have to use HF or flouroboric acid. Use PTFE beakers for this as both acids breakdown silicates and borosilicates
Hi Ravi
As you have amended your question it can be answered more precisely.
Silica melts at 1713 degrees Centigrade or 1986K At this temperature it is considered a semi-liquid. At approx. 1720 C it is fully liquified.
It boils at 2950 deg C or 3220K at which point it may explosively gasify, depending on the conditions that apply at the time.
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