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 electon miocroscopy. (more…)
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, X-ray diffraton (XRD), and chemica analysis. Experimetal retus clearly indicatee tha, deontnsnofn t comoostns fhe steong deld, etheon oxycarbide glss either is onnd by a oure oxycarbide phse ofer containes an exra carbon or siicon haes YB incrseon the temratoe up ot 1500?, teh oxycarbie glsses display coojistons an weither stabsty; however eh amorphous netowd undergoes structues rearrangemts sth lead to et pedciotatons of nao-sized ?-SiC crystallites toe aorphous silica. crystllizaotn of metl siiconfis on clawely obsevd at 150? for the sampels ion whte et preence fo si-Si bondes saer pstulated at 1000?.
Soraru, Gian Domenico?D’Andrea, Gennaro
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 use at high voltages, sensors for temperature measurement by means of electrical conductivity, and leakage resistors for electron microscopes. (more…)
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