SINTESIS DAN KARAKTERISASI SENYAWA BERSTRUKTUR AURIVILLIUS EMPAT DAN LIMA LAPIS
Aurivillius oxides with composition of Na0,5Bi4,5Ti4O15, K0,5Bi4,5Ti4O15, Sr4Bi2Nb2Ti3O18, Ba4Bi2Nb2Ti3O18 and Bi5Ti5FeO18 have been synthesis using the solid state reaction. The obtained oxides were policrystallin. All the oxides were white, except Bi5Ti5FeO18 was brick red in colour. Structure typ...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/1924 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Aurivillius oxides with composition of Na0,5Bi4,5Ti4O15, K0,5Bi4,5Ti4O15, Sr4Bi2Nb2Ti3O18, Ba4Bi2Nb2Ti3O18 and Bi5Ti5FeO18 have been synthesis using the solid state reaction. The obtained oxides were policrystallin. All the oxides were white, except Bi5Ti5FeO18 was brick red in colour. Structure type determination was carried out using Phasanx software and PDF data base. It can be concluded that Na0,5Bi4,5Ti4O15, K0,5Bi4,5Ti4O15, Sr4Bi2Nb2Ti3O18, Ba4Bi2Nb2Ti3O18 and Bi5Ti5FeO18 adopted orthorombic crystal system and space group A2 1 arn with unit cell parameter a = 5,427(2) Å , b = 5.459(3) Å and c = 40.78(2) Å for Na0,5Bi4,5Ti4O15 ; a = 5.430(1) Å, b = 5.5258(6) Å and c = 50.747(5) Å for K0,5Bi4,5Ti4O15 ; a = 5.5439(9) Å b = 5.5258(6) Å and c = 50.747(5) Å for Sr4Bi2Nb2Ti3O18 ; a = 5.540(2) Å, b = 5.579(4) Å and c = 50.962(8) Å for Ba4Bi2Nb2Ti3O18; whilst for Bi5Ti5FeO18 a = 5.520(1) Å, b = 5.569(3) Å and c = 50.36(1) Å. Ferroelectric properties were investigated. All oxides have saturation polarization (Ps) 16.2 µCcm-2 and polarization remanent Pr(+) and Pr(-) 0.049 µCcm-2 for Na0,5Bi4,5Ti4O15; 0.051 µCcm-2 for K0,5Bi4,5Ti4O15; 0.045 µCcm-2 for Sr4Bi2Nb2Ti3O18; 0.050 µCcm2 for Ba4Bi2Nb2Ti3O18 and 0.050 µCcm-2 for Bi5Ti5FeO18. |
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