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Selection of High-k Dielectric Materials
Published in Niladri Pratap Maity, Reshmi Maity, Srimanta Baishya, High-K Gate Dielectric Materials, 2020
There are several alternative high-k dielectric materials studied for the determination of replacing SiO2 in future technology due to the problems of high gate leakage current, standby power consumption, and gate oxide reliability. Since similar capacitance with a physically larger thickness can be provided by the high-k films, therefore they can be used to reduce the gate leakage current (Jiang et al., 2004). Some of them are aluminum oxide (Al2O3), titanium oxide (TiO2), titanium-based compound (TiLaO), tantalum oxide (Ta2O5), silicon nitride (Si3N4), hafnium oxide (HfO2), hafnium silicate (HfSiO4), hafnium-based compounds (HfON, HfLaO, HfTaO, HfTiSiO, HfAlO, HfSiO, HfSiON, and HfAlON), zirconium dioxide (ZrO2), zirconium silicate (ZrSiO4), zirconium-based compound (ZrON), lead titanate (PbTiO3), cerium oxide (CeO2), dysprosium oxide (Dy2O3), strontium titanium oxide (Sr2TiO4), strontium zirconate (SrZrO3), strontium titanate [SrTiO3 (STO)], strontium-based compounds (SrTa2O6 and SrHfO3), barium strontium titanate [BaxSr1 ˗ xTiO3(BST)], tita-nium–aluminum oxynitride (TAON), titanium–aluminum oxide (TAO), yttrium oxide (Y2O3), lanthanum oxide (La2O3), lanthanum aluminate (LaAlO3), lanthanum lutetium oxide (LaLuO3), lutetium oxide (Lu2O3), erbium oxide (Er2O3), gadolinium oxide (Gd2O3), praseodymium oxide (Pr2O3) etc. (Gaddipati, 2004; Jiang, 2004; Miyoshi et al., 2010; Demkov and Navrotsky, 2005; Yeh et al., 2009; Liu et al., 2011; Noor et al., 2010; Cheng et al., 2011; Maity et al., 2016; 2017a; 2017b; Zhang et al., 2011).
A review of bio-fuelled LHR engines
Published in International Journal of Ambient Energy, 2020
Krishna Kumar Pandey, S. Murugan
Lanthanum aluminate (LHA) is a newly developed alumina-based ceramic coating which consists of La2O3, Al2O3 and MgO that possess long-term structural and thermomechanical stability up to 1673 K (Friedrich, Gadow, and Lischka 2008; Gadow and Schäfer 1999). The sintering rate of LHA is smaller than that of zirconia-based TBCs.