Electrical Properties of Potassium Chromate

Cojocaru, Laura; Costea, T.; Negoescu, I.; Podeanu, G.

doi:10.1524/zpch.1973.85.5_6.225

Cited by 4 publications

(1 citation statement)

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“…The existing data on defect energies in low symmetry crystals are inadequate and cannot provide a clear picture of the transport mechanism in such solids. Recently, reports on low symmetry crystals have appeared in the literature (5)(6)(7)(8) indicating some very interesting features in the transport properties which may be linked to different conduction mechanism(s).…”

Section: Introductionmentioning

confidence: 99%

Electrical Conductivity and Phase Transformation Studies on Pure and Doped (Mg²⁺, Zn²⁺, Cu²⁺, and Mn²⁺) Crystals of K₂SO₄

Natarajan¹,

Secco²

1975

Can. J. Chem.

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MAHADEVA NATARAJAN and ETALO A. SECCO. Can. J. Chem. 53,1542 (1975. . , Electrical conductivity measurements have been made on single crystals of undoped potassium sulfate and on single crystals of K2S04 doped with divalent ions, viz. MgZ+, Zn2+, Cu2+, and MnZ+. The presence of the divalent ion increases the cation migration energy. The lower defect formation energy is attributed to the lower symmetry of K2S04 relative to the high symmetry cubic systems previously studied.The presence of the dopants and dopant concentration, i.e. Cu2+, show varying effects on the magnitude and nature of the conductivity discontinuity at the orthorhombic-hexagonal phase transition temperature. The phenomenon of "pretransition", 350 to 425 "C, is observed in both pure and doped crystals. Preannealing the crystal contributes to interesting behavior on all the crystals studied. The G-T behavior of K2S04 crystal doped with radioactive "Zn, however, exhibits a simpler linear dependence and the absence of "pretransition" anomaly. MAHADEVA NATARAJAN et ETALO

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Section: Introductionmentioning

confidence: 99%