Glass seal

Another set of apparatus ( B) adopts the 5 19 joint as standard (apart from 7/12 for thermometers) but connexions to condensers, etc., incorporate internal glass seals. A typical assembly for distillation is depicted in Fig. XII,... 

A prerequisite of long-life sodium/sulfur batteries is that the cells contain suitable corrosion-resistant materials which withstand the aggressively corrosive environment of this high—temperature system. Stackpool and Maclachlan have reported on investigations in this field [17], The components in an Na/S cell are required to be corrosion-resistant towards sodium, sulfur and especially sodium polysulphides. Four cell components suffer particularly in the Na/S environment the glass seal, the anode seal, the cathode seal, and the current collector (in central sodium arrangements, the cell case). 

The glass seal mainly shows corrosion problems relating to the thermodynamic... 

They show signs of plasticity when submitted to prolonged stresses (pitch, glass, sealing-wax, etc., flow very slowly). 

P, Petri dish TS, PTFE supports PP, polymerized packing (Lukopren ) G, glass seal, E, platinum planar electrodes TW, thermostated water [68. ... 

Tungsten and molybdenum, which have been used extensively for metal-to-glass seals, suffer from the disadvantages of being expensive... 

Metal-to-Glass Seals using Kovar Tubing... 

The filler tube is next attached, followed by the gas outlet tube. The metal-to-glass seals with the electrodes are put in last. 

Copper to soft glass seals are most easily made since the difference in expansion rates is least here, but satisfactory seals of copper to Pyrex can be formed with a little more care. A further factor with... 

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