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Preparation of calcium aluminates by a chemical method

✍ Scribed by L.P. Morozova; F.D. Tamás; T.V. Kuznetsova

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
873 KB
Volume
18
Category
Article
ISSN
0008-8846

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✦ Synopsis

A new method was elaborated for the preparation of calcium aluminates. The method consists of dissolving calculated amounts of calcium carbonate in an aqueous solution of aluminum chloride and preparing mixed A1-Ca-hydroxides by a chemical interaction with ammonium hydroxide. These hydroxides are subsequently fired (if necessary after pretreatment, as washing, peiietizing, etc.) to the desired caicium aluminate. Monomineraiic C3A , C12A7, CA, CA 2 and CA 5 were prepared by this method at temperatures by 300-500 K iower than conventionai synthesis using oxides or carbonates as raw materiaIs.

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Physico-chemical processes in single cry
Physico-chemical processes in single crystal growing of calcium aluminates by zone melting
✍ Ju. P. Oudalov; N. I. Ibragimov 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 438 KB

The growing of single crystals of calcium aluminates of compositions 12 CaO . 7 Al,O,, CaO \* A1203, and CaO . 2 A1,0, by zone melting under vacuum of 10-5 mm Hg permitted t o establish that some of the A13+ ions in octahedral coordination have been driven back by the moving crystallization front. E