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We study some properties of the extended phase space of a quantum-corrected Schwarzschild black hole surrounded by a perfect fluid. In particular we demonstrate that, due to the quantum correction, there exist first and second order phase transitions for a certain range of the state parameter of the perfect fluid, and we explicitly analyze some cases. Besides that, we describe the efficiency of this system as a heat engine and the effect of quantum corrections for different surrounding fluids.
The Rastall gravity is the modified Einstein general relativity, in which the energy-momentum conservation law is generalized to $T^{mu u}_{~~;mu}=lambda R^{, u}$. In this work, we derive the Kerr-Newman-AdS (KN-AdS) black hole solutions surrounded b
We study the thermodynamic stabilities of uncharged and charged black holes surrounded by quintessence (BHQ) by means of effective thermodynamic quantities. When the state parameter of quintessence $omega_q$ is appropriately chosen, the structures of
In this paper we analyze the propagation of a charged scalar field in a Reissner-Nordstrom black hole endowed with one anisotropic fluid that can play the role of a cosmological term for certain set of parameters. The evolution of a scalar wave scatt
We investigate black holes formed by static perfect fluid with $p=-rho/3$. These represent the black holes in $S_3$ and $H_3$ spatial geometries. There are three classes of black-hole solutions, two $S_3$ types and one $H_3$ type. The interesting sol
Basing on the ideas used by Kiselev, we study the Hayward black hole surrounded by quintessence. By setting for the quintessence state parameter at the special case of $omega=-frac{2}{3}$, using the metric of the black hole surrounded by quintessence