| Name: Martin Koberstein | Profession: Inventor |
| Relationship: | Country: United States |
| http://www.freepatentsonline.com/4164557.html
Title: Process for the production of .beta.-lithium aluminate and needle-shaped product Document Type and Number: United States Patent 4164557 Link to this Page: http://www.freepatentsonline.com/4164557.html Abstract: A process for the production of .beta.-lithium aluminate LiAlO.sub.2,
is disclosed wherein a lithium hydroxide aluminate of the formula: Li.sub.2
O . Al.sub.2 O.sub.3 . nH.sub.2 O is precipitated from aqueous solutions
which contain the lithium ions and aluminum in ionogenic or elementary form
at a pH value above 7. The concentration of the two metal components is at
least 0.1, at most 6 g-atoms per liter, preferably 2 to 5 g-atoms per liter.
The precipitation product is washed and dried and then is converted by annealing
into .beta.-lithium aluminate, in the temperature range between 200.degree.
C. and 800.degree. C., preferably 400.degree. C.-650.degree. C., and especially
450.degree. C.-550.degree. C. The .beta.-LiAlO.sub.2 obtained thereby has
a lamellae-shaped or fine crystalline form which is converted into a
needle-shaped, crystalline lithium aluminate, is obtained by the process
of the invention and is suitable for the construction of electrolyte matrices.
Inventors: Feldmann, Martin; Koberstein, Edgar; Seibold, Klaus; Application Number: 886365 Filing Date: 1978-03-14 Publication Date: 1979-08-14 |
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