Sirovy、Czolgos1949-10-01Materiales de Construccion
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D.L. Bloem1949-10-01Materiales de Construccion
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B. Nordberg1949-10-01Materiales de Construccion
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Editorial1949-10-01Materiales de Construccion
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R. Dicharry1949-10-01Materiales de Construccion
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Anónimo1949-10-01Materiales de Construccion
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G.H. Barnard1949-10-01Materiales de Construccion
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Knibbs、Gee1949-10-01Materiales de Construccion
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F. Margival1949-10-01Materiales de Construccion
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E.J. Spohn1949-10-01Materiales de Construccion
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M. Mansuelli1949-10-01Materiales de Construccion
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Anónimo1949-10-01Materiales de Construccion
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W.B. Lenhart1949-10-01Materiales de Construccion
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Van Ujrtvanck1949-10-01Materiales de Construccion
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Anónimo1949-10-01Materiales de Construccion
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L.D. Minsk1949-10-01Materiales de Construccion
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C. Goria、M. Appiano1949-10-01Materiales de Construccion
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J.T. Robson1949-10-01Materiales de Construccion
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H. F. Kay、P. Vousden1949-10-01OpenAlex
Summary The optical changes in BaTiO3 are described, and it is shown that they can be completely explained if the crystal symmetry changes from tetragonal to orthorhombic at -5°C, and then to rhombohedral at -90°C. These changes have been confirmed by X-ray investigations, and it is concluded that the three transition…
Ferroelectric and Piezoelectric MaterialsSolid-state spectroscopy and crystallographyX-ray Diffraction in Crystallography
A. F. Devonshire1949-10-01OpenAlex
Summary The theory of the dielectric and crystallographic properties of barium titanate is considered. By expanding the free energy as a function of polarization and strain and making reasonable assumptions about the coefficients, it is found possible to account for the various crystal transitions. Calculations are ma…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisThermal and Kinetic Analysis