Publication

Phase diagram for the 0.4Pb(Ni-1/3,Nb-1/3)O-3-0.6Pb(Zr,Ti)O-3 solid solution in the vicinity of a morphotropic phase boundary

Dragan Damjanovic, Gilles Robert
1998
Journal Articles

Abstract

A phase diagram based on dielectric-permittivity-versus-temperature measurements and high-temperature X-ray diffractometry was proposed for 0.4Pb(Ni-1/3,Nb-1/3) O-3-xPbZrO(3)-(0.6-x)PbTiO3, (0.2 less than or equal to x less than or equal to 0.32) relaxor-ferroelectric solid solution, and a morphotropic phase boundary that sharply bends toward zirconium-rich compositions was found. A spontaneous normal-to-relaxer ferroelectric transition was also observed when heating was performed for all the compositions tested near the morphotropic phase boundary. Additional considerations about previously published phase diagrams for Pb(Zn-1/3,Nb-2/3)O-3-PbTiO3 and Pb(Mg-1/3,Nb-1/3)O-3-PbTiO3 might lead to an extension of the presented diagram to these compositions.

Official source

https://infoscience.epfl.ch/entities/publication/55542d6d-a58b-4be0-803e-b52584944a75

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Dragan Damjanovic, Gilles Robert
1998
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/55542d6d-a58b-4be0-803e-b52584944a75

About this result

Related concepts (31)

Phase diagram

A phase diagram in physical chemistry, engineering, mineralogy, and materials science is a type of chart used to show conditions (pressure, temperature, volume, etc.) at which thermodynamically distinct phases (such as solid, liquid or gaseous states) occur and coexist at equilibrium. Common components of a phase diagram are lines of equilibrium or phase boundaries, which refer to lines that mark conditions under which multiple phases can coexist at equilibrium. Phase transitions occur along lines of equilibrium.

Phase (matter)

In the physical sciences, a phase is a region of material that is chemically uniform, physically distinct, and (often) mechanically separable. In a system consisting of ice and water in a glass jar, the ice cubes are one phase, the water is a second phase, and the humid air is a third phase over the ice and water. The glass of the jar is another separate phase. (See .) More precisely, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform.

Liquid crystal

Liquid crystal (LC) is a state of matter whose properties are between those of conventional liquids and those of solid crystals. For example, a liquid crystal may flow like a liquid, but its molecules may be oriented in a crystal-like way. There are many types of LC phases, which can be distinguished by their optical properties (such as textures). The contrasting textures arise due to molecules within one area of material ("domain") being oriented in the same direction but different areas having different orientations.

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Phase diagram for the 0.4Pb(Ni-1/3,Nb-1/3)O-3-0.6Pb(Zr,Ti)O-3 solid solution in the vicinity of a morphotropic phase boundary

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