Ceramic and Glass Materials
70 M.C. Wilding I. Zvereva et al., Complex aluminates RE2SrAl2O7 (RE = La, Nd, Sm-Ho): Cation ordering and stability of the dou ...
J.F. Shackelford and R.H. Doremus (eds.), Ceramic and Glass Materials: 71 Structure, Properties and Processing. © Springer 2008 ...
72 L.P. Davila et al. its properties permit it to be used in high-temperature and corrosive environments and as abrasives, refra ...
5 Quartz and Silicas 73 SiO 4 tetrahedra. These silica structures have been determined mainly by X-ray and neutron diffraction m ...
74 L.P. Davila et al. 2.1 Silica Polymorphs The name quartz comes from the German word “quarz,” of uncertain origin. Quartz and ...
5 Quartz and Silicas 75 silica derivatives,” with eucryptite (LiAlSiO 4 ), nepheline (Na 3 K(AlSiO 4 ) 4 ), carnegieite (NaAlSiO ...
76 L.P. Davila et al. Table 2Structure of low-quartza Bravais lattice Unit cell dimensionsa (a,b,c) in nm Unit cell major angles ...
5 Quartz and Silicas 77 2.3 Cristobalite Cristobalite, the highest-temperature polymorph of silica, was named after the place wh ...
78 L.P. Davila et al. but varies over a wide range in vitreous silica. Table 4 summarizes these traits. The predominant Si−O−Si ...
5 Quartz and Silicas 79 identifying the average Si−O−Si bond angle at 144° and the overall distribution of that angle varying be ...
80 L.P. Davila et al. The short-range structure (i.e., length scale below 0.5 nm) of vitreous silica has been studied in terms o ...
5 Quartz and Silicas 81 for several types of vitreous silica. Ultra-pure vitreous silica with elevated high trans- parency is re ...
82 L.P. Davila et al. enough energy to produce absorption centers, known as color or defect centers, in vitreous silica. A chara ...
5 Quartz and Silicas 83 sodium carbonate at elevated temperature and pressure. Quartz particles are fed into the bottom of the g ...
84 L.P. Davila et al. to the difficulty in drying porous gels without large shrinkage and cracking and the associated high costs ...
5 Quartz and Silicas 85 C. Klein and C.S. Hurlbut, Jr., Manual of Mineralogy, 21st edn., John Wiley, NY, 1993, p. 527. Y.M. Chi ...
86 L.P. Davila et al. R. Bruckner, Mechanical properties of glasses, in Glasses and Amorphous Materials, R.W. Cahn, P. Haasen, ...
J.F. Shackelford and R.H. Doremus (eds.), Ceramic and Glass Materials: 87 Structure, Properties and Processing. © Springer 2008 ...
88 J.D. Smith and W.G. Fahrenholtz of this volume. A brief overview of fireclays, high aluminas, and silica is provided here fol ...
6 Refractory Oxides 89 basic practices to improve steel cleanliness. The changing process requirements spurred the development o ...
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