Calcium–magnesium–alumina–silicate (CMAS) corrosion resistance is an important issue on the design of next-generation thermal battier coatings. As one of the promising thermal battier coatings, the lanthanum zirconate coating has attracted continuous attention. In this work, three lanthanum z...

The poor fracture toughness limits the wide application of the cubic lanthanum zirconate (La2Zr2O7) ceramics. The current study reports a dramatic fracture toughness improvement of lanthanum zirconates by the introduction of lanthanum aluminates (LaAlO3), a ferroelastic second phase. A composite...

This review article summarizes the latest information about the manufacturing techniques of lanthanum zirconate (La2Zr2O7, LZ) powder and La2Zr2O7 based thermal barrier coatings (TBCs). Lanthanum zirconate is a promising candidate material for TBC applications, due to its lower thermal conductiv...

Three lanthanum zirconate (LZO) thermal barrier coatings with designed La/Zr ratios, i.e., 0.7:1 (LZO-7), 1:1 (LZO-10), and 2:1 (LZO-20), are fabricated by laser enhanced chemical vapor deposition and their corrosion resistance in 40 wt% V2O5 + 60 wt% Na2SO4 mixture is studied at 900 °C. The re...

In the present study, the effect of deposition temperature in the range 773–973 K on structural and nanomechanical properties of lanthanum zirconate (La2Zr2O7) ceramic coatings deposited on Inconel-718 substrates by EB-PVD process has been investigated. X-ray diffraction and Raman spectroscopy ...

Lanthanum Zirconate (LZ) has been found as prosperous thermal barrier coating (TBCs) material for its high melting point, phase stability and lower thermal conductivity. LZ has been synthesized by planetary ball milling method using a mixture of La2O3 and ZrO2 powders in a 1:2 mol ratio for 24 h...

The interaction between oxygen in the gas phase and La2–xCaxZr2O7–α (x = 0; 0.05; 0.1) with a pyrochlore structure was studied by the isotope exchange method with the gas phase equilibration in the temperature range of 600–900 °C and the oxygen pressure of 1.01 kPa. The oxygen diffusion and...

Titanium-Zirconium-Molybdenum alloy and Lanthanum-doped Titanium-Zirconium-Molybdenum alloy were fabricated by powder metallurgy method. The effect of lanthanum in arc erosion of titanium-zirconium-molybdenum alloy was investigated by using SEM, arc erosion test system and analytical balance. Re...

Inorganic lithium solid-state electrolytes with advantage of safety are considered as the candidates to substitute the organic liquid electrolytes in lithium ion batteries. Sintering of these solid electrolytes always requires high-temperature and long time. In this paper, spark plasma sintering...

The modulation and tuning of the photocatalytic activity of commercial titanium dioxide (TiO2) P25 nanoparticles is demonstrated through the incorporation of lanthanum (La) and/or graphene oxide (GO). These composite materials, which could have applications in commercial products, were prepared ...

In the present investigation, lanthanum–titanium [La3Ti6O4(OH)6(C2F3O2)13(H2O)2(C4H8O)6] (1) was successfully used as single source precursor to fabricate electrodes of LTO 600 (La4Ti9O24-La2O3-LaTiO3-TiO2(rutile)) and LTO 700 (La4Ti9O24-La2O3) at sintering temperature of 600 and 700 °C, respe...

Er3+-containing gallium-lanthanum oxysulfide glasses have been prepared from Ga2O3 and La2S3 in a sulfur/argon reactive atmosphere. The samples have been characterized by absorption and emission spectroscopy and IR emission kinetics. Er3+ electronic transition intensities have been analyzed in t...

The development of sulfide materials as infrared-transmitting optical ceramics is limited by the phonon absorption edge, vibrational mode frequencies, crystal chemistry and thermomechanical properties. The lanthanum oxysulfides and sulfides consist of a series of refractory materials La2O2S, β-...

The new quaternary lanthanum copper oxysulfide La3CuO2S3 has been synthesized by the reaction of La2S3 and CuO at 1223 K. This compound crystallizes in space group Pnma of the orthorhombic system with four formula units in a cell of dimensions at 153 K of a=14.0318(7) Å, b=3.9342(2) Å, and c=12....

Neodymium-activated lanthanum oxysulfide (LOS:Nd) has recently received interest as a new laser material. Good quality single crystals of this material have been grown by the Czochralski method. Since LOS decomposes when melted, melt departure from stoichiometry was studied. Equipment and growth...

Sulfidization of lanthanum oxide and hydroxide to the corresponding oxysulfide was studied using simultaneous thermogravimetry/differential scanning calorimetry coupled with mass spectrometry (TG/DSC/MS) and temperature-programmed sulfidization coupled with mass spectrometry (TPS/MS) techniques....

The fluorescence intensity ratio (FIR) technique for temperature sensing has been demonstrated in La2O2S:Nd3+ phosphors. The phosphors were extensively characterized using various methods such as X-ray diffraction, photoluminescence excitation, and photoluminescence spectra. Upon ultraviolet–vi...

The electronic band structure, lattice dynamics and dielectric properties of lanthanum oxysulfide (La2O2S) have been investigated within density functional theory. It is found that lanthanum oxysulfide is an indirect band-gap semiconductor. Density functional perturbation theory is employed to e...

The lanthanum oxysulfide phosphor La2O2S:Tb3+ is generally synthesized by the direct sulfidation of La2O3 using H2S or CS2 gas. However, these gases are known to be highly toxic to humans. In this paper, a new synthesis method that uses 0.6Li2SO4–0.4Na2SO4 as the flux is proposed for obtaining ...

Catalysts based on nickel, niobium and lanthanum were obtained from precursors such as LaNiO3, LaNi0.5Nb0.5O3 and NiO/Nb2O5 and evaluated in the partial oxidation of methane (POM). X-ray diffraction (XRD) in situ studies using synchrotron light, under H2, indicate that after reduction the LaNiO3...