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These values bracket the value published for the crystalline misfit layer compound prepared at high temperature.
The ferecrystalline ([SnSe]1.16 1 NbSe2)1 compound is 1.6 times more conductive than the misfit layer compound.
A new polytype of the misfit layer compound ([SnSe]1.16 1 NbSe2)1 with extensive rotational disorder was prepared from designed modulated elemental reactants.
The a- and b-axis in-plane lattice parameters of both the SnSe and NbSe2 constituents were incommensurate, which differs from the misfit layer compound formed via high temperature reaction that has a common b-axis lattice parameter for the two constituents.
Both treatment types, performed at 973 and 1173 K for 0.5, 2 and 4 h, produce modified surface layers: the outer layer (compound layer) consists essentially of TiO2 and small amounts of TiNxOy, while the inner layer (diffusion layer) consists of α-Ti crystals rich in interstitial atoms.
Under ambient conditions, the crystalline symmetry varies with increasing δ; cubic SrFeO3 (δ = 0), tetragonal Sr8Fe8O23 (δ = 0.125), orthorhombic Sr4Fe4O11 (δ = 0.25) and Sr2Fe2O5 (or SrFeO2.5, so-called Brownmillerite), 5) and recently discovered infinite layer compound SrFeO2 (δ = 1).
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Layer compounds containing niobium combined with metal show peculiar photocatalytic activity.
Layer compounds are very attractive due to their ability to undergo photointercalation.
According to the structural analysis, compound 1 shows a [Pb3Cl6] layer; compounds 2 4 show an infinite chain, but they were connected with imaH or ima bridges, respectively; compound 5 also has an infinite chain constructed of double chloride bridges; and compounds 6 and 7 exhibit layers without chloride ions involved.
The experimental results show that a Ti TiN multi-layer compound coating thicker than 4 μm can be obtained on a cast iron piston ring, and the wear resistant properties of the cast iron piston ring-cylinder pair of an internal-combustion engine can be appreciably improved utilizing this technique.
The Ti TiN multi-layer compound coating on a cast iron piston ring utilizing the authors' improved 'multi-arc and magnetron sputtering ion compound plating device' has been investigated by measuring the total thickness, fractography morphology, phases, micro-Vickers hardness, critical load, internal stress and wear resistance.
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