Preparation method for perovskite lead titanate single-crystal nanometer sheet

Abstract

The invention relates to a preparation method for a perovskite lead titanate single-crystal nanometer sheet. A hydro-thermal reaction method is adopted according to the preparation method. The preparation method comprises the following steps: taking titanium dioxide as a raw material; taking a potassium hydroxide aqueous solution as a hydro-thermal medium and dropwise adding a lead nitrate aqueous solution; and stirring, and then performing thermal treatment at high temperature, thereby obtaining the perovskite lead titanate single-crystal nanometer sheet with a two-dimensional laminated structure. The technical process of the preparation method has the advantages of simpleness, easiness in control, zero pollution, low cost and easiness in mass production. The prepared perovskite lead titanate single-crystal nanometer sheet with the two-dimensional laminated structure is high in purity and excellent in dispersibility.

Description

technical field [0001] The invention relates to a method for preparing perovskite lead titanate single crystal nanosheets, belonging to the field of inorganic non-metallic materials. Background technique [0002] Lead titanate (PbTiO 3 ) is a typical ferroelectric oxide with a perovskite structure, which has a simple structure and excellent ferroelectric, piezoelectric, and dielectric properties. Lead titanate has been widely used in the preparation of microelectronic devices such as non-volatile ferroelectric memory, piezoelectric sensor, pyroelectric sensor and high dielectric capacitor. As the miniaturization requirements of electronic devices continue to increase, two-dimensional individual ferroelectric single crystal materials have attracted more and more attention. On the one hand, experiments confirmed that ultrathin single-crystal BaTiO 3 have reduced the thickness of single-crystal capacitors to 65nm, on the other hand, theoretical studies predict ferroelectric ...

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Problems solved by technology

So far, there are almost no large-scale preparations of single ferroelectric single crystal nanosheets by chemical methods, and there are no reports and patents on perovskite structure lead titanate single crystal nanosheets.

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