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| Verifiedrevid | 443643862 |
| Othernames | Lead(II) titanate Lead titanium oxide Lead(II) titanium oxide |
Lead(II) titanate is an inorganic compound with the chemical formula PbTiO3. It is the lead salt of titanic acid. Lead(II) titanate is a yellow powder that is insoluble in water.
At high temperatures, lead titanate adopts a cubic perovskite structure. At 760 K,[1] 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[Zr_{x}T_{1-x}]O3, 0 ≤ x ≤ 1, PZT) system, which is technologically one of the most important ferroelectric and piezoelectric ceramics; [clarification needed].
Lead titanate occurs in nature as mineral macedonite.[2][3]
Toxicity
Lead titanate is toxic, like other lead compounds. It irritates skin, mucous membranes and eyes. It may also cause harm to unborn babies and might have effects on fertility.[4]
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 4.9 × 10−4 mol/kg at pH≈3, to 1.9 × 10−4 mol/kg at pH≈7.7, to "undetectable" (<3.2 × 10−7 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.[5]
References
- ^ Noheda, Beatriz; Cereceda, Noé; Iglesias, Tomás; Lifante, Ginés; Gonzalo, Julio A.; Chen, Hui Ting; Wang, Yong Ling (1995-06-01). "Composition dependence of the ferroelectric-paraelectric transition in the mixed system PbZr1−xTixO3". Physical Review B. 51 (22): 16388–16391. American Physical Society (APS). Bibcode:1995PhRvB..5116388N. doi:10.1103/physrevb.51.16388. ISSN 0163-1829. PMID 9978623
- ^ 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)
- ^ "Archived copy". Archived from the original on 2011-07-19. Retrieved 2010-09-12.
- ^ 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.[1]