Phase transition, structure/properties of poly(p-phenylene terephthalamide) films post-polymerized by pyridine in NMP/CaCl2 solvent

1990 ◽  
Vol 23 (3) ◽  
pp. 287-293
Author(s):  
Moo San Rhim ◽  
Sung Chul Kim
Keyword(s):  
Phase Transition ◽  
Transition Structure ◽  
Structure Properties

PHASE TRANSITION, GEOMETROTHERMODYNAMICS AND CRITICAL EXPONENTS OF BARDEEN BLACK HOLE

2014 ◽  
Vol 23 (04) ◽  
pp. 1450040
Author(s):  
JIE-XIONG MO
Keyword(s):  
Phase Transition ◽  
Black Hole ◽  
Specific Heat ◽  
Critical Exponents ◽  
Transition Point ◽  
Scaling Laws ◽  
Phase Transition Point ◽  
Invariant Metrics ◽  
Thermodynamic Quantities ◽  
Transition Structure

In this paper, we investigate the phase transition of Bardeen black hole for the first time. First, we calculate thermodynamic quantities and correct the misuse of formula in former literature. Second, we investigate in detail the behavior of specific heat. We not only discuss the influence of parameter on phase transition, but also show the three-dimensional behavior of the specific heat. It is shown that phase transition takes place from a locally unstable large black hole to a locally stable small black hole. It is also shown that the location of phase transition point is proportional to the charge. Meanwhile, we study the behavior of the inverse of the isothermal compressibility and find that it diverges at the phase transition point. Thirdly, we build up geometrothermodynamics to examine the phase transition structure. It is shown that Legendre invariant thermodynamic scalar curvature diverges exactly where the specific heat diverges, which leads to the conclusion that the Legendre invariant metrics can correctly produce the behavior of the phase transition structure. Furthermore, to gain a thorough understanding of critical behavior, we calculate the relevant critical exponents and examine the scaling laws. It is shown that they are in agreement with the scaling laws.

Thermodynamics and geometrothermodynamics of Born–Infeld black holes with cosmological constant

2015 ◽  
Vol 24 (11) ◽  
pp. 1550092
Author(s):  
Hernando Quevedo ◽  
María N. Quevedo ◽  
Alberto Sánchez
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Cosmological Constant ◽  
Thermodynamic System ◽  
Physical Parameters ◽  
Spherically Symmetric ◽  
Transition Structure ◽  
Thermodynamic Variable ◽  
Thermodynamic Variables ◽  
Range Of Values

In this paper, we investigate a class of spherically symmetric Born–Infeld black holes which contains the mass, electric charge, Born–Infeld parameter and the cosmological constant as physical parameters. We show that for the mass to be an extensive thermodynamic variable, it is necessary to consider the cosmological constant and the Born–Infeld parameter as thermodynamic variables as well. We analyze the properties of such a thermodynamic system, explore the range of values where the system is thermodynamically well-defined, and the phase transition structure. In addition, we show that the equilibrium manifold in the context of geometrothermodynamics reproduces correctly the thermodynamic properties of this black hole class.

Irradiation effects on the structure, properties and phase transition in PLZT and PSN ferroelectric ceramics

1986 ◽  
Vol 69 (1) ◽  
pp. 95-104 ◽  
Author(s):  
A. Sternberg ◽  
L. Shebanov ◽  
A. Rubulis ◽  
G. Grinvalds ◽  
A. Kapenieks ◽  
...  
Keyword(s):  
Phase Transition ◽  
Ferroelectric Ceramics ◽  
Irradiation Effects ◽  
Structure Properties

Phase transition, structure and luminescence of Eu:YAG nanophosphors by co-precipitation method

2009 ◽  
Vol 470 (1-2) ◽  
pp. 306-310 ◽  
Author(s):  
J. Su ◽  
Q.L. Zhang ◽  
S.F. Shao ◽  
W.P. Liu ◽  
S.M. Wan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Precipitation Method ◽  
Transition Structure ◽  
Co Precipitation

Phase transition induced by pressure in TbCrO4 oxide: Relationship structure–properties

2009 ◽  
Vol 488 (2) ◽  
pp. 524-527 ◽  
Author(s):  
E. Climent ◽  
J.M. Gallardo ◽  
J. Romero de Paz ◽  
N. Taira ◽  
R. Sáez Puche
Keyword(s):  
Phase Transition ◽  
Relationship Structure ◽  
Structure Properties
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