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Lead titanium oxide
Lead(II) titanium oxide
|Molar mass||303.09 g/mol|
|Main hazards||Toxic (T)
Dangerous for the environment (N)
May damage fertility or unborn child
|R-phrases||R20/22, R33, R50/53, R61, R62|
|S-phrases||S45, S53, S60, S61|
|Lethal dose or concentration (LD, LC):|
LD50 (median dose)
|12000 mg/kg (rat)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
At high temperatures, lead titanate adopts a cubic perovskite structure. At 760 K, the material undergoes a second order phase transition to a tetragonal perovskite structure which exhibits ferroelectricity. Lead titanate is one of the end members of the lead zirconate titanate (Pb[ZrxTi1-x]O3 0≤x≤1, PZT) system, which is technologically one of the most important ferroelectric and piezoelectric ceramics; PbTiO3 has a high ratio of k33 to kp with a high kt.
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Solubility in water
The solubility of hydrothermally-synthesized perovskite-phase PbTiO3 in water was experimentally determined at 25 and 80 °C to depend on pH and vary from 4.9x10-4 mol/kg at pH≈3, to 1.9x10-4 mol/kg at pH≈7.7, to "undetectable" (<3.2x10-7 mol/kg) in the range 10<pH<11. At still higher pH values, the solubility increased again. The solubility was apparently incongruent and was quantified as the analytical concentration of Pb.
- Alfa Aesar http://www.alfa.com/en/GP100w.pgm?DSSTK=035671
- Noheda, Cereceda, Iglesias, Lifante, Gonzalo, Chen and Wang, Phys. Rev. B 51, 16388 (1995)
- Radusinović, Dušan and Markov, Cvetko "Macedonite - lead titanate: a new mineral", American Mineralogist 56, 387-394 (1971), http://www.minsocam.org/ammin/AM56/AM56_387.pdf
- Burke, E.A.J. and Kieft, C. "Second occurrence of makedonite, PbTiO3, Långban, Sweden", Lithos 4, 101-104 (1971)
- Jooho Moon, Melanie L. Carasso, Henrik G. Krarup, Jeffrey A. Kerchner, "Particle-shape control and formation mechanisms of hydrothermally derived lead titanate", Journal of Materials Research, Vol. 14, No.3, March 1999.