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Sodium P-alumina

One extremely important member of this class is sodium p-alumina. p-Alumina has a structure based on close-packed layers of oxygen with ordered oxygen vacancies. Sodium cations reside in the vacancies created by the oxygen deficiency and migrate from site to site. This process is particularly easy, as there are many more sites available than sodium atoms and the sodium cation is small compared with the oxygen anion. Schematically this could be represented as shown in Figure 5.17... [Pg.116]

Figure 5.17 Schematic diagram of sodium cation conduction in sodium p-alumina... Figure 5.17 Schematic diagram of sodium cation conduction in sodium p-alumina...
Figure 7.5 Costal structure of sodium p-alumina [57] one of the two Na + -conducting planes, together with the two adjacent spinel blocks. Na ions = gray AIO4 tetrahedra and AIO, octahedra = white. Figure 7.5 Costal structure of sodium p-alumina [57] one of the two Na + -conducting planes, together with the two adjacent spinel blocks. Na ions = gray AIO4 tetrahedra and AIO, octahedra = white.
The electrical and/or magnetic properties of a number of mixed oxides of A1 and other metals including members of the spinel family (see Box 12.6) and sodium P-alumina (see Section 27.3) have extremely important industrial applications. In this section, we single out Ca3Al205 because of its role in cement manufacture, and because it contains a... [Pg.316]

Specialty alumina derived from the Bayer process resemble SGA, except for a higher a-Al203 content, which is usually >80%, and a lower surface area, typically <20 m /g. The remaining material is generally sodium p-alumina (Table 2) formed as a result of the soda contamination common to the process (2—7). The mineralogical and stmctural properties of calcined aluminas are given in Table 2 (3). [Pg.160]

J. Tong, and D. Chen, Preparation of alumina by aqueous gelcasting, Ceram. Int., 30, 2061 -6 (2004). K. Terabe, S. Yamaguchi, and Y.lguchi, Characterization of sodium p-alumina prepared by sol-gel method. Solid state ionics, 40-41, 111-4(1990). [Pg.402]

M. W. Breiter, G. C. Farrington, W. L. Roth and J. L. Duffy, Production of hydronium p-alumina from sodium p-alumina and characterization of conversion products. Mat. Res. Bull. 12 (1977) 895-906. [Pg.206]

Figure 12.21 Laboratory scale apparatus for the sintering of sodium p-alumina. Figure 12.21 Laboratory scale apparatus for the sintering of sodium p-alumina.
Figure 3.1 (a) A simplified representation of the structure of sodium P-alumina. The... [Pg.127]

The ionic conductivity in the pure sodium P-alumina is the highest of any alkali metal cation in the P-alumina structure. Depending on the... [Pg.128]

See other pages where Sodium P-alumina is mentioned: [Pg.160]    [Pg.160]    [Pg.249]    [Pg.222]    [Pg.146]    [Pg.384]    [Pg.268]    [Pg.160]    [Pg.160]    [Pg.50]    [Pg.352]    [Pg.351]    [Pg.397]    [Pg.397]    [Pg.208]    [Pg.398]    [Pg.352]    [Pg.128]    [Pg.129]    [Pg.123]   
See also in sourсe #XX -- [ Pg.195 ]

See also in sourсe #XX -- [ Pg.815 ]

See also in sourсe #XX -- [ Pg.351 , Pg.940 , Pg.941 ]

See also in sourсe #XX -- [ Pg.398 , Pg.1034 , Pg.1034 ]



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