Titanates magnesium

Sapphire substrates, for II-Vl or III-V applications, can be found through the 100 mm range. Whereas, ZnSe, ZnTe, and GaN are found in the 1 cm range in research quantities. Efforts on ZnSe and related substrates increased with the demonstration of blue lasers in this material system. However, those efforts are foreshadowed by the blue LED and laser results in GaN. Presently there are several major research efforts underway to produce large area GaN substrates. The nitride substrate development effort also is motivated by high power, temperature and frequency device applications. For superconductors, lanthanum aluminate, strontium titanate, magnesium oxide, and other related substrates are found in the few to tens of square centimeter ranges. 

Metals passivation in the resid FCC unit may also be accomplished through the addition of metal traps. Tin, barium titanate, strontium titanate, magnesium oxide, manganese oxide, and specialized zeolite types and contents have all been used for vanadium trapping. In addition, zeolites coated with alumina and catalyst particles coated with rare earth have also been applied to resist vanadium poisoning. Antimony, bismuth, and specialized active high crystalline aluminas have all been used successfully to counteract the negative effect of nickel in the FCC unit. 

Dialkylaminoethyl acryhc esters are readily prepared by transesterification of the corresponding dialkylaminoethanol (102,103). Catalysts include strong acids and tetraalkyl titanates for higher alkyl esters and titanates, sodium phenoxides, magnesium alkoxides, and dialkyitin oxides, as well as titanium and zirconium chelates, for the preparation of functional esters. Because of loss of catalyst activity during the reaction, incremental or continuous additions may be required to maintain an adequate reaction rate. 

Other. Insoluble alkaline-earth metal and heavy metal stannates are prepared by the metathetic reaction of a soluble salt of the metal with a soluble alkah—metal stannate. They are used as additives to ceramic dielectric bodies (32). The use of bismuth stannate [12777-45-6] Bi2(Sn02)3 5H20, with barium titanate produces a ceramic capacitor body of uniform dielectric constant over a substantial temperature range (33). Ceramic and dielectric properties of individual stannates are given in Reference 34. Other typical commercially available stannates are barium stannate [12009-18-6] BaSnO calcium stannate [12013 6-6] CaSnO magnesium stannate [12032-29-0], MgSnO and strontium stannate [12143-34-9], SrSnO. ... 

The resultant slag, a complex mixture of titanates, may contain 70—85% Ti02- The slag route is particularly useful when ilmenite is closely associated with haematite, from which it cannot economically be separated mechanically. Because the iron content of the slag is low, its use reduces the quantity of iron sulfate in the Hquid effluent of sulfate process plants. Slag used as a feedstock for TiCl production must be low in magnesium and calcium. A variety of other ilmenite beneficiation or synthetic mtile processes have been pursued, primarily to provide alternative chloride process feedstocks. Low grade ilmenite... 

Enhanced anti-corrosion properties are also reportedly achieved by mill additions of lithium titanate, lithium aluminate or magnesium titanate to the host glass frit . 

Two methods are commonly used for the determination of magnesium. Titan yellow may be used to obtain a coloured colloidal suspension, or solochrome black to give a red soluble complex. In most cases the second of these is to be preferred. 

Unter den metallorganischen Verbindungen haben die Verbindungen der Alkalimetal-le, des Magnesiums, Bors, Aluminiums, Zinks und Titans als Reduktionsmittel gewisse Bedeutung. 

Sychev, M. M., Medvedeva, I. N., Biokov, V. A. Krylov, O. S. (1982). Effect of reaction kinetics and morphology of neoformation on the properties of phosphate cements based on magnesium titanates. Chemical Abstracts, 96, 222252e. 

In contrast to allyl magnesium chloride and allyl titanous triisopropoxide, allyl tita-nous trisdiethylamide reacts cleanly with imidazolides to give j ,y-unsaturated ketones practically free of concomitant carbinols. Furthermore, the products can be obtained free of isomers (a,/ -unsaturated ketones) if they are purified by distillation rather than chromatography. 

Iron titanates, 25 46 47 Iron titanium brown spinel, formula and DCMA number, 7 348t Iron trimer, 16 62 Ironworks, early American, 14 492 Iron/Zinc/Magnesium Oxide Tan pigment for plastics, 7 369t Irradiated uranium, plutonium separation and purification from, 19 674-675 Irradiation... 

Lead-lithium alloys, 14 779 Lead-lithium-tin alloys, 14 779 Lead magnesium niobate (PMN), 5 583 Lead manganese niobaterlead titanate (PMN PT), 22 713... 

An alternative formation of titanated alkoxyallenes could be achieved by reaction of 3-alkoxy-2-propyn-l-yl carbonates 78 with (r/2-propene)titanium diisopropoxylate (79). Successive addition of 80 to benzaldehyde afforded the corresponding addition products 81 in high yield (Scheme 8.22) [70]. The results demonstrate that titanium species 75 and 80 can serve as easily available ester homoenolate equivalents. Notably, conversion of lithiated alkoxyallenes to the magnesium species by treatment with MgBr2 followed by addition to chiral carbonyl compounds resulted in a mixture of a- and y-products [71]. 

Die reduktiven Eigenschaften des Systems Titan(IV)-chlorid-Magnesium/Tetrahydro-furan konnen auch fur die Synthese von Azo-Verbindungen aus Nitrobenzolen genutzt werden4. 

Other chemical processes in which sulphur dioxide functions as an oxidising agent include the interaction of sulphur dioxide with stannous chloride or titanous chloride in aqueous solution containing hydrochloric acid, when the salts are converted into the corresponding tetrachlorides 5 also the interaction of the gas with organo-magnesium compounds, when the organic sulphide is produced to some extent.6... 

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