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silicon dioxide

(SiO2) A hard, glassy mineral found in materials such as rock, quartz, sand and opal. In metal oxide semiconductor (MOS) chip fabrication, silicon dioxide is used to create the insulation layer between the metal gates of the top layer and the silicon elements below. See silica gel.



silica gel

An absorbent form of silicon dioxide often wrapped in small packets that is shipped with equipment to absorb moisture. Silica gel packets are desiccants.

Don't Throw Them Away
Silica gel packets can be used to remove odors in a gym bag. Stored in a box of photos, they can prevent them from sticking to each other, and they can extend the life of razors by eliminating moisture. A wet phone can be dried out if placed in a jar filled with the gel bags. See silicon dioxide.




Silica Gel Packets
These commonly found desiccants are small beads of silica gel inside paper packets.






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