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  2. Borosilicate glass - Wikipedia

    en.wikipedia.org/wiki/Borosilicate_glass

    Borosilicate is referred to as "hard glass" and has a higher melting point (approximately 3,000 °F / 1648 °C) than "soft glass", which is preferred for glassblowing by beadmakers. Raw glass used in lampworking comes in glass rods for solid work and glass tubes for hollow work tubes and vessels/containers.

  3. List of physical properties of glass - Wikipedia

    en.wikipedia.org/wiki/List_of_physical...

    Soda–lime glass (for containers) [2] Borosilicate (low expansion, similar to Pyrex, Duran) Glass wool (for thermal insulation) Special optical glass (similar to Lead crystal) Fused silica Germania glass Germanium selenide glass Chemical composition, wt% 74 SiO 2, 13 Na 2 O, 10.5 CaO, 1.3 Al 2 O 3, 0.3 K 2 O, 0.2 SO 3, 0.2 MgO, 0.01 TiO 2, 0. ...

  4. Glass - Wikipedia

    en.wikipedia.org/wiki/Glass

    A Pyrex borosilicate glass measuring cup. Borosilicate glasses (e.g. Pyrex, Duran) typically contain 5–13% boron trioxide (B 2 O 3). [75] Borosilicate glasses have fairly low coefficients of thermal expansion (7740 Pyrex CTE is 3.25 × 10 −6 /°C [78] as compared to about 9 × 10 −6 /°C for a typical soda–lime glass [79]).

  5. Boron trioxide - Wikipedia

    en.wikipedia.org/wiki/Boron_trioxide

    Melting point: 450 °C (842 °F; 723 K) (trigonal) 510 °C (tetrahedral) ... Major component of borosilicate glass; Fluxing agent for glass and enamels [citation needed]

  6. Soda–lime glass - Wikipedia

    en.wikipedia.org/wiki/Soda–lime_glass

    The manufacturing process for soda–lime glass consists in melting the raw materials, which are the silica, soda (Na 2 O), hydrated lime (Ca(OH) 2), dolomite (CaMg(CO 3) 2, which provides the magnesium oxide), and aluminium oxide; along with small quantities of fining agents (e.g., sodium sulfate (Na 2 SO 4), sodium chloride (NaCl), etc.) in a glass furnace at temperatures locally up to 1675 ...

  7. Vycor - Wikipedia

    en.wikipedia.org/wiki/Vycor

    Vycor is the brand name of Corning's high-silica, high-temperature glass.It provides very high thermal shock resistance. Vycor is approximately 96% silica and 4% boron trioxide, but unlike pure fused silica, it can be readily manufactured in a variety of shapes.

  8. Talk:Borosilicate glass - Wikipedia

    en.wikipedia.org/wiki/Talk:Borosilicate_glass

    Actually glass doesn't have any such thing as a melting point. Also borosilicate glass doesn't even have a higher softening temperature than conventional soda-lime glass. The main advantage is the low thermal expansion coefficient. It makes borosilicate glass less sensitive to thermal gradients and thermal shock. Regards, Herbert

  9. Float glass - Wikipedia

    en.wikipedia.org/wiki/Float_glass

    Float glass is a sheet of glass made by floating molten glass on a bed of molten metal of a low melting point, typically tin, [1] although lead was used for the process in the past. [2] This method gives the sheet uniform thickness and a very flat surface. [ 3 ]

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