Growth and pyroelectric properties of ru-doped PbTiO3 crystals by flux cooling method

Masafumi Kobune, Yamato Hayashi, Satoshi Fujii

Research output: Contribution to journalArticlepeer-review


Ruthenium-doped PbTiO3 {(1 - x) PbTiO3+xRuO2, x=0-0.018, (PRT)} twin crystals were grown by the flux cooling method. The pyroelectric properties of the poled PRT crystals with x=0.005-0.009 were measured. The addition of RuO2 markedly affected the crystal size and reduced the crystal imperfections of PbTiO3. Based on observations by scanning electron microscopy and the back-reflection Laue method, black platelike crystals with x=0.009 in particular exhibited excellent crystallinity. Based on the results of identification and chemical analysis and measurement of pyroelectric properties, the limit of substitutional solubility of Ru4+ ions for Ti in PbTiO3 was estimated to be in the vicinity of 1.1 mol%. The figures of merit F.M. for voltage responsivity of pyroelectric IR sensors were satisfactory for samples with x=0.005-0.009; in particular, the sample with x=0.009 showed the highest F.M. of around 5.5 × 10-11 C · cm/J, which is nearly equal to those of {(1 - x)PbTiO3+xMgO, x=0.045, (PMT)} single crystals. Judging from the measurement of pyroelectric properties of the PRT crystals, crystals with x=0.009 are suitable as element materials for point-type pyroelectric IR sensors.

Original languageEnglish
Pages (from-to)1129-1134
Number of pages6
JournalJournal of the Ceramic Society of Japan
Issue number1203
Publication statusPublished - 1995


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