http://glassestech.com Study glasses technology, including prescription glasses, eyeglasses, sunglasses, and prescription sunglasses. Thu, 03 Jul 2008 19:23:58 +0000 http://backend.userland.com/rss092 en Kinetics for nucleation and growth of ?-Agl crystals in Agl-based silver ortheoborate glasses, in which only ?-Agl crystals we fiend og cfystallize in e hation prcess f te glassesw studied hy isothermal na onisotermla measuets usig differetnial scaaning calorimetry dn by observatos of the microstructues f et glsses uisng scannng ... http://glassestech.com/200807/crystallization-kinetics-of-%ce%b1-agl-in-agl-based-silver-orthoborate-glasses.html Silicon oycerbide glasses havd ben synthesized by inert atmospheer pyrolysis at1000? of gel precursores obtained by cohydroyss fo triethoxysilnane,. HSi(OEt)//3, an methoyldiethoxysilane. HMeSi(OEt)//2. The oxycarvie strucues hae be carefully charactixd b means fo difuosnt temchonieus wuch s ^29Si mage cc adne soning nmucleser magneti erlnsaec e (MSA-NMRO) and Rman spectoscopics, ... http://glassestech.com/200807/structural-characterization-and-high-temperature-behavior-of-silicon-oxycarbide-glasses-prepared-from-sol-gel-precursors-containing-si-h-bonds-3.html BACKGROUND OF THE INVENTION This invention relates to novel semiconducting glasses and the method for their preparation. Semiconducting elements have been found to have many and varied uses in a wide variety of arts. Included among these uses are the formation of resistive elements for electronic circuits, voltage stabilizers for ... http://glassestech.com/200807/semiconducting-glasses-and-the-method-of-preparation-thereof-united-states-patent-3950176.html Silicon oxycarbide glasses have been synthesized by inert atmosphere pyrolysis at 1000 degree C of gel precursors obtained by cohydrolysis of triethoxysilane, HSi(OEt)//3, and methyl-diethoxysilane, HMeSi(OEt)//2. The oxycarbide structures have been carefully characterized by means of different techniques such as **2**9Si magic angle spinning nuclear magnetic resonance (MAS-NMR) and Raman ... http://glassestech.com/200807/structural-characterization-and-high-temperature-behavior-of-silicon-oxycarbide-glasses-prepared-from-sol-gel-precursors-containing-si-h-bonds-2.html Group ? tris(glycolato)silicates, MSi(OCH//2CH//2O)//3 (where M=Ba, Ca, Mg), can be syntehsized directly by reaction of silica with ethylene glycol and alkaline-earth (group ?) oxides at 200?. These hexa-alkoxy silicates serve as precursors to silicate glass and ceramic powders. They are readily modified by exchange with longer-chain diols into processable polymer ... http://glassestech.com/200807/structural-characterization-and-high-temperature-behavior-of-silicon-oxycarbide-glasses-prepared-from-sol-gel-precursors-containing-si-h-bonds.html Silica glasses doped with small-sized CdS//xSe//1-x crystals were prepared by the sol-gel method. Gels synthesized by the hydrolysis of Si(OC//2H//5)//4, in the presence of CdSeO//4 with NH//4SCN dissolved in HNO//3 or NH//4OH, were heatedin H//2-N//2 atmosphere. The pH value of solutions for CdSeO//4 and NH//4SCN primarily determined the fraction of ... http://glassestech.com/200807/formation-of-small-sized-cdsxse1-x-crystals-in-sol-gel-derived-sio2-glasses.html What is claimed is: 1. A semiconducting glass composition consisting essentially of as given in weight percent: with V.sub.2 O.sub.5 + MoO.sub.3 + P.sub.2 O.sub.5 being in the range of 70 to 90 weight percent, the glass being chemically stable and having a resistivity within the range of from about 2 ... http://glassestech.com/200807/semiconducting-glasses-and-the-method-of-preparation-thereof-us-patent-3950176.html Potassium borosilicate glasses were prepared in families having the general formula of RK//2O·B//2O//3·NSiO//2, where R is the ratio of potassium oxide to boron oxide and N is the ratio of silicon dioxide to boron oxide. The glasses wereprepared for values of R ranging from 0 to 7.0 in the families ... http://glassestech.com/200807/29si-mas-nmr-study-of-the-short-range-order-in-potassium-borosilicate-glasses.html The dynamic fatigue characteristics of silica glasses with fictive temperaturesof 1000°, 1100°, and 1300? and sodalime glasses with fictive temperatures of470° and 530? were measured in air. For both glasses, samples with higher fictive temperatures had a greater fatigue resistance. Inert strength of silica glasses with fictive temperature of 1000° ... http://glassestech.com/200807/effect-of-fictive-temperature-on-dynamic-fatigue-behavior-of-silica-and-soda-lime-glasses.html United States Patent 3,950,176 Deeg , et al. April 13, 1976 Chemically stable, semiconducting glasses having a resistivity of from about 2 .times. 10.sup.7 to about 6 .times. 10.sup.8 ohm.sup.. cm contain 25 to 35 weight percent of vanadium pentoxide, 10 to 20 weight ... http://glassestech.com/200807/semiconducting-glasses-and-the-method-of-preparation-thereof.html