Reaction equation
O.O.O.O.O.O.O.O.[OH-].[Ba+2:10].[OH-].[B:12]([OH:15])([OH:14])[OH:13]>>[B:12]([O-:15])([O-:14])[O-:13].[Ba+2:10].[B:12]([O-:15])([O-:14])[O-:13].[Ba+2:10].[Ba+2:10].[Ba:10].[B:12]Participants
5
Procedure
A filtered solution of barium hydroxide octahydrate reacted with an aqueous solution of boric acid to provide hydrated γ barium borate having a barium to boron ratio of 1:2 and having fine particle size. The hydrated γ barium borate was converted to the anhydrous γ form at about 300° to 400° C. Further heating to about 600° to 800° C. converted the product to β-BaB2O4. The conversion to the β-form is preferably during sintering of a ceramic dielectric composition to which the γ-BaB2O4 has been added as a flux.
Sources & evidence
- ORD record
- ord-49b48ac72ca24acebbc8dfc2f88ba2d1
- Source dataset
- uspto-grants-1990_01
- Patent number
- US04897249
Linked notes
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