Closed cell borosilicate glass

Closed Cell Foamed Borosilicate Glass Block Lining System... 

Chemical Resistance—completely closed-cell, foamed borosilicate glass block is resistant to weak bases, all organic and almost all inorganic acids. It is not resistant to hydrofluoric acid, acid fluorides or strong alkalies. 

In the early 1970s, light, closed-cell foamed borosilicate glass block (see Chapter 17) were developed. These block, with a mass of only 12 Ib/cu.ft., will adhere to the underside of a concrete or steel cover by using a urethane asphaltic adhesive all joints between them are made the same way. Insulation of this type has been applied to the underside of both concrete and steel covers and has functioned successfully for a decade. 

A rather simple microspectrophotometer which permits accurate absorption measurements using a capillary cell with a content of only 10 pi was described by Wallach and Surgenor (Wl). The cells are made from borosilicate glass tubing of 1-mm bore. They are precisely 10 mm long and are closed by quartz disks. These are held in position by capillary forces. A monochromatic light beam 0.4 mm in diameter is obtained from a glass prism monochromator. The cell is positioned... 

The measurement cell consists of a borosilicate glass microchannel (VitroCom), a polymer holder, and two reservoirs. Such microchannel has a rectangular 300 x 300 pm cross section and is 4 cm long. Prior to experiment, the channel was cleaned in an ultrasonic cleaner with a NaOH base solution and then flushed with deionized water. For the closed-end cell,... 

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