Boro glasses

Glass fiber board consisting of a boro-silicate glass shows a thermal conductivity under pressure which is dependent on the temperature (Table 17). There is a natural concern about the safety of any fiber mate-... 

A typical production reactor for the atmospheric deposition of Si02 and boro-phospho-silicate glass is shown in Fig. 5.11. 

Figure 4. Photografting with various sensitizers [AM] = 2.00M, [sensitizer] = 0.20M in acetone light source two 200W medium-pressure Hg lamps with a boro-silicate glass filter sensitizer BP(1), methyl 2-benzoylbenzoate(2), 9-fluorenone(3), 4-bromobenzophenone(4) (17)...

Boro-silicate glass. Take into account its lack of ductility and its sensitivity to thermal and mechanical shock. 

Non-volatile residue. Measure approx 100ml of the cold sample into a chilled 100-ml graduate and place it In n tared boro-silicate glass evaporating dish. Allow the EtnO to evaporate to dryness at RT. Place the dish in an oven at 105° to 110°C for 30 mins. Cool the dish in a desiccator and reweigh it to the nearest mg. Calculate the non-volatile residue by subtracting the care wt from the wc of the dish containing the residue... 

The waste forms were a fully loaded, pressure sintered titanate waste containing zeolite and silicon additions, a copper boro-silicate glass prepared from Frit 199 supplied by Battelle Northwest Laboratories, and a copper borosUicate glass prepared from the same frit and containing 30% by weight of waste oxides. 

When boraetc add is added, it forms boro-silicates, often more fusible, moro ductile, easier to work, and producing loss waste, especially in table-ware and plate-glass manufacture. M. Paves remarks that the experiments undertaken, by Mil. Hae9 and Clkman-DOT on crystal, with a baso of oxide of zinc, yielded products remarkable for their whiteness, their transparency, their hardness, and the brilliant reflection of their cut faces. 

Bibler, N. E. Smith, P. Kent, "Characterization of Boro-silicate Glass Containing Savannah River Plant Radioactive Waste." To be published in Proceedings of the Materials Characterization Conference, August 16-18, 1982, Alfred, NY. 

Fig. 21.22. Slurry-fed vitrification furnace converts aqueous high-level waste into a boro-aluminum silicate glass form. (Courtesy USDOE.)...

Chromatographic System (See Chromatography, Appendix IIA.) Use a gas chromatograph equipped with a flame-ionization detector, and containing a 2.4-m x 4-mm (id) boro-silicate glass column, or equivalent, packed with 2% liquid phase, 5% phenyl methyl silicone on 80- to 100-mesh support (Supelcoport, or equivalent). Maintain the column isother-mally at a temperature between 270° and 280°, and the injection port and detector block at about 310°. Use helium as the carrier gas at a flow rate of about 70 mL/min. 

Closed Cell Foamed Boro silicate Glass Block Lining System 167... 

The time-resolved spectroscopy of Cr doped spinel and petalite-like phase types glass-ceramics enables a more accurate distinction of the and T2 energy levels of Cr(III) and of the equilibrium between the population of two levels, see Fig. 5, which presents the time-resolved spectra of spinel type glass-ceramics excited at 680 nm at room temperature Glass-ceramics derived from boro-silicate glasses containing Cr(III) were also recently studied by laser spectroscopy and fluorescence-line narrowing. 

The increase of refractive index of optical glass due to annealing (in the third decimal place with boros ilicate glasses) is described well by the Me Master equation... 

---