Showing papers in "Materials Research Bulletin in 1981"

TL;DR: In this article, a series of phases MICa2Nb3O10 (MI = Li, Na, K, Rb, Cs, NH4, Tl) has been prepared and characterized.

TL;DR: In this article, the existence range of a homogeneous phase ZrxTiySnzO4 with x+y+z=2 was investigated and the unusual variation of the lattice parameters with the Sn content was discussed and the range of compositions suitable for dielectric resonators was defined.

TL;DR: In this paper, composites containing 10 to 70 volume percent PZT were prepared with several different rod diameters, and measured dielectric constants ranged from 200 to 1000, longitudinal piezoelectric coefficients d33 from 200- 350 pC/N, and hydrostatic PZE coefficients dh from 40 to 80 pC /N.

TL;DR: In this article, a layered structure of vanadium pentoxide gels analogous to that of montmorillonites is presented. But the structure of the fibers themselves is not modified during the swelling process and can be presumably related to the lamellar structure of orthorhombic vanadium compounds.

TL;DR: In this article, a direct phase transformation was used to obtain diamond and cubic boron nitride mixed crystals with sphalerite structure, which can be described by the formula (BN)xC1−x, 0 < x < 1, showing short range order expressed by substitution of B-N pair by C-C pair in the first coordination sphere.

TL;DR: A crystal chemistry study of the three solid solutions Na1+xZr2−xLx(PO4)3 (L = Cr, In, Yb) has been carried out as mentioned in this paper.

TL;DR: A series of mixed metal oxides with pyrochlore structure has been discovered and can be described by the general formula A2[B2−xAx]O7−y where A = Pb or Bi, B = Ru or Ir, 0 < x ≲ 1 and 0 ≤ y ≤ 0.5 as mentioned in this paper.

TL;DR: On the basis of a discussion of the correlations between the stability of the d 3 configuration and the symmetry and size of the cation site, six-coordinated iron (V) has been stabilized in the La 2 LiFeO 6 perovskite-type oxide and characterized by magnetic susceptibility, Mossbauer resonance and EPR measurements as discussed by the authors.

TL;DR: In this article, the electrochemical behavior of α-Fe 2 O 3 and Fe 3 O 4 cathodes has been investigated in cells containing lithium - aluminium anodes and a molten LiCl/KCl electrolyte.

TL;DR: In this article, the luminance properties of Eu 3+ and Tb 3+ in doped LaMgB 5 O 10 have been studied over the 100-400 nm excitation range.

TL;DR: The formation of stoichiometric titanium disulfide from the elements is a strong function of both sulfur partial pressure and temperature as discussed by the authors, and material best suited for use as the cathode active component of lithium batteries is optimally prepared from titanium sponge between 450° and 600°C in a temperature gradient which fixes the sulfur pressure and thereby precludes the formation of both the nonstoichiometric disulfides and the trisulfide.

TL;DR: In this article, single crystals of lanthanide aluminates LnMgAl11O19 have been prepared with the purpose of investigating their physical properties which could eventually have useful applications.

TL;DR: In this paper, the authors derived the FMR conditions from total free energy expressions, where the differences between magnetization direction and applied field direction were taken into consideration, and obtained the three best fitting parameters of K 1, K u, δ and γ.

TL;DR: In this paper, the ionic conductivity of the polycrystalline samples of the lithium chloride spinel, Li 2 MCl 4 (M = Mg, Mn, Fe, Cd) is measured by the help of ac techniques in the temperature range of 25-500°C.

TL;DR: In this paper, it was shown that the reactivity and the kinetics of hydridation depend on the high-temperature treatments of the oxygen-stabilized alloys.

TL;DR: In this paper, the conductivity of single crystals of ion rich and ion rich β alumina was measured by the complex impedance method in the 25-700°C temperature range.

TL;DR: The crystal structure of a low temperature modification of Mg2NiH4(LT), stable below 235°C, has been determined from Guinier-Hagg powder diffraction data as discussed by the authors.

TL;DR: The reaction of FeCl 3 dissolved in dry nitromethane with polyacetylene, (CH) x, results in the formation of p-type conducting polymers ( σ = 780 ohm −1 cm −1 ) as discussed by the authors.

TL;DR: In this paper, the catalytic activity of LnFeO 3 and LnCrO 3 for methanol oxidation has been studied by the measurement of conductivity change in the mixture gas ( O 2 (0.5%) + N 2 (99.5%), where the activity of these compounds appeared above the Neel points.

TL;DR: FeNb 3 Se 10 is obtained by heating the elements at 650°C in silica evacuated tubes as discussed by the authors, where two types of chains are running in the structure along the b axis.

TL;DR: In this article, the influence of various dopants on the behavior of single crystalline SrTiO3 electrodes in a photoelectrochemical cell for water decomposition has been investigated.

TL;DR: A class of inorganic chloride glasses based on BiCl3 as glass-former is described in this article, which is characterized by infra-red transparency to unusually long wavelengths, and their transition temperatures reported.

TL;DR: In this article, a mixture of LiF and AlF 3 is evaporated under 1 mPa onto glass substrates kept at room temperature, and the resulting 0.8 μm thick colorless transparent film is amorphous even after annealing at 600°C.

TL;DR: In this article, measurements of lattice constants, density and transition temperature have been carried out on α-HgI 2 single crystals grown both from vapor phase and from solution under different stoichiometric conditions.

TL;DR: In this article, the Mossbauer spectra at low temperature can be interpreted assuming a disproportionation of tetravalent iron according to a scheme previously proposed for CaFeO3: 2 FeIV → FeIII + FeV.

TL;DR: In the ordered La2Li0,5Ni 0,5O4 phase with K2NiF4 structure, a Jahn-Teller distortion of the (NiO6) octahedra is observed as discussed by the authors.

TL;DR: In this article, the authors measured the magnetic moment of oriented single crystals of YTiO 3 at 4.2K and revealed that the b- and c-axes are easy axes of magnetization while the a-axis is hard.

TL;DR: In this article, the vitreous areas are described in the ThF4-AlF3-YF3 -BaF2 quaternary system and in the four basic ternary diagrams.

TL;DR: Ionic conductivity measurements in the solid solution Na1+xZr2−xLx(PO4)3 (L = Cr, Yb) have been carried out as mentioned in this paper.