Round 3: Tossup 17

A thin coating of titanium dioxide on this material makes it superhydrophilic and allows for photocatalytic “self-cleaning.” This material is made to a uniform thickness over a molten tin bath in the Pilkington process, which produces this material’s “float” type. (-5[1])When manufacturing this material, soda and lime are added to lower the melting temperature of its main component to around 1600 degrees (10[1])Celsius. (10[1])A low coefficient of thermal expansion is characteristic of this material’s “borosilicate” type. (10[1])Fused quartz (10[1])is one type of this amorphous material (10[1])composed almost entirely of silicon dioxide. (10[1])For 10 points, the melting of sand produces what material sold by Pyrex? ■END■

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