Glass fragments

Enameling meets decorative as weU as protective requirements. Ceramic enamels are mainly based on alkaH borosiHcate glasses. The part to be enameled is dipped into or sprayed with a sHp, ie, a water suspension of glass fragments called frit. The sHp coating is dried and fused in an enameling furnace under careful heat control (see Enamels, porcelain or vitreous). 

Lethal glass fragments. Limit for public housing, schools, etc. 

A common cause of erosion is partial obstruction of tubes by foreign bodies. At the inlet end, for example, debris such as sticks, glass fragments, and wood chips may lodge in tube ends or be held against the tubes by water flow. The nominal velocity of the water past the obstruction increases according to the degree of obstruction. It can be shown... 

To prevent glass fragments from flying in the event of an explosion, use should be made of metal gauzes to screen reaction flasks etc., or cages, e.g. for desiccators. Vessels of awkward size/shape may be covered with cling film. 

Glass Dewar flasks for small-scale storage should be in metal containers, and any exposed glass taped to prevent glass fragments flying in the event of fracture/implosion. 

The laser 39Ar-40Ar results for a black aphanite clast from 73215 demonstrate that this rock is cogenetic with the aphanite that forms the matrix of the breccia. Ages determined for felsic glass fragments in the two types of aphanite, and for groundmass in... 

Mirti, P., Lepora, A., and Sagui, L. (2000). Scientific analysis of seventh-century glass fragments from the Crypta Balbi in Rome. Archaeometry 42 359-374. 

Historically, ordinary glass windows are not adequate for blast overpressures as low as 0.2 psi (1.4 kPa). Many injuries in explosion accidents result from glass fragments. Therefore, the use of windows should be discouraged. 

Installation of a "catch system" to block larger glass fragments, or even the entire window pane or frame. The system must be able to stop the entire window missile within a reasonable distance. 

Film thickness is measured in gauge or mils. According to test results reported by several manufacturers, film thickness appears to affect resistance to penetration/ tearing, with thicker films being more resistant to penetration and tearing. However, the application of a thicker film did not decrease glass fragmentation. 

Fig. 3.19. Vacuum viscometer design. A solvent reservoir, B hanging burette, C site for freeze seal, F killing agent in break-seal phial, G stainless steel ball bearing in appendix, H coarse frit to retain glass fragments, J phial breaker, K stirrer, P initiator phial.

The design in Fig. 3.19 is intended to be used thus Solvent is distilled from the vacuum line into A, and a measured amount of monomer is distilled into B. Then a freeze seal is made with solvent at C and the viscometer is sealed off at D. All the monomer is distilled from B to E, solvent is distilled from AtoB and a measured amount of it first into E to dissolve the monomer and more onto the phial P of initiator which is then broken. If the initiator is volatile, this is not necessary and it can be distilled directly into E. If it is not volatile, a solution of it is poured into E through the frit H which retains the glass fragments. After good mixing in E, the whole rig is thermostatted and the viscosity measurements are started. 

Hydrolysis of Glass. Heat a part of a glass tube until it softens and rapidly lower its end into a beaker with water. Repeat the operation several times. Pour off the water, transfer the fine glass fragments into a porcelain mortar, and grind them into a powder. Pour... 

BLAST FROM A 2" DIAM PRESSURIZED SEALED GLASS CYLINDER G = Sealed end glass cylinder 1%" long F = Glass fragments S, = Main shock wave S2 Second shock wave H = Head of rarefaction wave... 

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