Sol-gel type synthesis of Bi.sub.2 (Sr,Ta.sub.2)O.sub.9 using an acetate based system
AssigneeSandia Corporation
InventorTimothy J. Boyle
Life of this patent
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Abstract
A method of forming a layered-perovskite bismuth-strontium-tantalum oxide (SBT) ferroelectric material is performed by dissolving a bismuth compound in a first solvent to form a first solution, mixing a strontium compound and a tantalum compound to form a binary mixture, dissolving the binary mixture in a second solvent to form a second solution, mixing the first solution with the second solution to form a SBT precursor solution, evaporating the first and second solvents to form a SBT precursor material and subsequently sintering said SBT precursor material in the presence of oxygen.
Claims9
A method of forming a bismuth-strontium-tantalum oxide (SBT) precursor material, comprising the steps of:
- dissolving a bismuth compound having a C.sub.1 -C.sub.5 carboxylate ligand in a first solvent to form a first solution;
- mixing a strontium C.sub.1 -C.sub.5 carboxylate compound and a tantalum C.sub.1 -C.sub.5 alkoxide compound to form a binary mixture;
- dissolving said binary mixture in a second solvent to form a second solution;
- mixing said first solution with said second solution to form a SBT precursor solution;
- and
- evaporating said first and second solvents to form a SBT precursor material.
A method of forming a layered-perovskite bismuth-strontium-tantalum oxide (SBT) ferroelectric material, comprising the steps of:
- dissolving a bismuth compound having a C.sub.1 -C.sub.5 carboxylate ligand in a first solvent to form a first solution;
- mixing a strontium C.sub.1 -C.sub.5 carboxylate compound and a tantalum C.sub.1 -C.sub.5 alkoxide compound to form a binary mixture;
- dissolving said binary mixture in a second solvent to form a second solution;
- mixing said first solution with said second solution to form a SBT precursor solution;
- evaporating said first and second solvents to form a SBT precursor material;
- and
- sintering said SBT precursor in the presence of oxygen.
A method of forming a layered-perovskite bismuth-strontium-tantalum oxide (SBT) ferroelectric material, comprising the steps of:
- dissolving bismuth acetate in pyridine to form a first solution;
- mixing strontium acetate and tantalum ethoxide to form a binary mixture;
- dissolving said binary mixture in acetic acid to form a second solution;
- mixing said first solution with said second solution to form a SBT precursor solution;
- depositing a thin coating of said SBT precursor solution on a substrate;
- evaporating said first and second solvents to form a SBT precursor material layer;
- and
- sintering said SBT precursor material in the presence of oxygen.
Dependencies are inferred from the claim text.