Mixed oxides, compounds

Inorganic Titanates. Titanium forms a series of mixed oxide compounds with other metals. Only in one of these, Ba2Ti04, ate there discrete TiOJ ions (99). Compounds of the general formula M" 2Ti02 or M " Ti02 are known as metatitanates those having AU TiO and are called... 

Chalcogen Binary oxides Compound Symmetry Mixed oxides Compound Symmetry... 

Table 4 Vanadates and mixed oxide compounds containing vanadium (v)...

The results of studies of niobates, tantalates, and mixed oxide compounds containing niobium(v) or tantalum(v) are summarized in Table 6. 

Table 7 Mixed-oxide compounds containing chromium [m)...

Table 10 Molybdates, tungstates, and mixed-oxide compounds of molybdenum-(vi) and tungsten (vi) with s-, p-, and d-block elements...

O-Donor Ligands. A large number of these studies concern molybdates, tungstates, and mixed-oxide compounds, and the results of many of them are summarized in Tables 4, 5, and 6. 

Table 11 Mixed oxide compounds of technetium and rhenium...

Comini E., Eerroni M., Gnidi V., Faglia G., Martinelli G., and Sbervegheri G., Nanostmctnred mixed oxides compounds for gas sensing applications. Sens. Actuators B, 84, 26-32, 2002. 

O-Donor Ligands. Table 1 summarizes the results of some studies concerning titanates and Ti mixed oxide compounds. The corrosion of titanium metal by liquid sodium containing dissolved oxygen has been shown to take place... 

O-Donor Ligands. Table 4 summarizes much of the data concerning vanadates and mixed oxide compounds containing vanadium(v) which have been reported this year. 

Mixed-oxide compounds of potential usefulness for fibre coatings were prepared by hybrid sol-gel synthesis and their thermal crystallization was monitored by thermal analysis and XRD [95]. Both the gels convert to the crystalline phase below about 1200 °C, via amorphous intermediates. Lanthanum hexaluminate crystallises sharply at 1230 via y-Al203. 

Perovskites are mixed oxide compounds of the general formula ABO3 containing a transition metal, such as Ti, Nb, Ta, in B position, Ca, Sr,... 

Merzlikin, S., Tolkachev, N., Briand, L., et al. (2010). Anomalous Surface Compositions of Stoichiometric Mixed Oxide Compounds, Angew. Cheitt Inti. Ed., 49, pp. 8037-8041. 

Thus far, the oxidation/corrosion behavior of materials which are nominally single phase, and form scales which are nominally single phase oxides has been discussed. In practice, composite materials are often desired to enhance mechanical properties or to improve other properties of the materials such as thermal conductivity, electrical conductivity, as well as oxidation resistance. In these cases, multi-phase materials are developed to enhance the desired properties. When these materials are subjected to high temperature oxidizing environments, the resulting oxidation products are also more complex. In general oxidation results in three classes of scales mixed oxides, compound oxides, or solution oxides. Examples of each will be discussed below. In addition, fiber reinforced composites are a special class of composite materials in which an interphase material is required between the fiber and the matrix to provide the required fracture toughness. The unique issues with these materials will also be discussed. 

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