borate glass वाक्य

उदाहरण वाक्य

1. Such glasses are superior in performance to concrete and to other barium borate glasses.
2. The most common compositions are based on lead borates ( leaded borate glass or borosilicate glass ).
3. However borate glass with more than 20 mol . % of lanthanum oxide is very durable under ambient conditions.
4. Borate glasses have lower wavelength-refraction dependence in the blue region of spectrum than silicate glasses with the same Abbe number.
5. After 1930, George W . Morey introduced the lanthanum oxide and oxides of other rare earth elements in borate glasses, greatly expanding the available range of high-index low-dispersion glasses.
6. Glasses most closely approach the ideal of homogeneity and isotropy, and for accurate work, minerals are usually prepared by dissolving them in a borate glass, and casting them into a flat disc or " bead ".