Synthesis and characterization of M–Cl (M=Fe, Co, Ni) Boracite (cas 1303-91-9)s

Add time:08/13/2019    Source:sciencedirect.com

The M–Cl (M=Fe, Co, Ni) boracites are prepared by a procedure consisting of solution mixing, evaporating to dryness, grinding and heating reaction in N2 atmosphere. The lattice parameter and the phase transition temperatures of the boracites Co3B7O13Cl and Ni3B7O13Cl are investigated by means of X-ray diffraction, transmission electron microscopy and differential scanning calorimetry. There are three reversible phase transitions in the Co–Cl boracite and one phase transition in the Ni–Cl boracite above room temperature. Temperature dependences of dielectric loss of M–Cl (M=Fe, Co, Ni) boracites are studied by the rectangular cavity perturbation method at a microwave frequency of 2.45 GHz. The ferroelectric property at room temperature of the Co3B7O13Cl is demonstrated.

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