COMPOSITION FOR MAKING FERROELECTRIC MATERIAL Russian patent published in 2009 - IPC C04B35/475 

FIELD: chemistry.

SUBSTANCE: invention relates to bismuth titanate based compositions, which are designed for making ferroelectric material and can be used in microelectronics for improving reprogrammable memory devices, as well as in acousto- and optoelectronics for modernising radio capacitors, piezoelectric transducers and filters, hydroacoustic devices, pyroelectric detectors of infrared radiation. The composition for making ferroelectric material has the following components, mol %: Bi₂O₃ 17.4 to 22.8; LaCl₃ 8.71 to 11.4; TiO₂ 32.7 to 42.7; KNO₃ 32.1 to 41.2. Samples obtained from the said composition had dielectric permittivity ranging from 220 to 240 in the frequency range from 1 to 1000 kHz at room temperature.

EFFECT: increased dielectric permittivity of materials due to increased uniformity of composition of ferroelectric materials.

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