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Journal articles on the topic 'Thermischer Transport'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Oppermann, H., and B. Marklein. "Untersuchungen zum thermischen Verhalten der Osmiumoxide / Investigation of the Thermochemical Behaviour of Osmium Oxides." Zeitschrift für Naturforschung B 53, no. 11 (November 1, 1998): 1352–64. http://dx.doi.org/10.1515/znb-1998-1121.

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The heterogeneous reactions:OsO4,s =OsO4,g, 2OsO2,s = Oss + OsO4,g, Oss + 3OsO4,g = 4OsO3,g, OsO2,s + OsO4,g = 2OsO3,g and the homogeneous reaction OsO4,g = OsO3,g + 1/2 O2,g were determined by total pressure measurements. From this and from chemical transport reactions of OsO2 and Os with Osmium tetroxide, the enthalpy of formation of gaseous OsO3 was computed to ΔH°B(OsO3,g,298) = -40,0 ± 3 kcal/mol.

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2

Oppermann, H., H. Dao Quoc, and A. Morgenstern. "Thermisches Verhalten von festem LaAlCl6 und chemischer Transport von LaCl3 mit AlCl3/Thermical Behaviour of Solid LaAlCl6 and Chemical Transport of LaCl3 with AlCl3." Zeitschrift für Naturforschung B 54, no. 11 (November 1, 1999): 1410–16. http://dx.doi.org/10.1515/znb-1999-1113.

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The thermodynamical data of solid aluminium lanthanum chloride LaAlCl6 have been obtained by determination of the decomposition equilibria from total pressure measurements. The melting diagram was determined by DTA. The chemical transport of LaCl3 with AlCl3 is suggesting the existence of the gaseous complex LaAl3Cl12. The data are:ΔH(LaAlCl6f,298) =-427,1 ±2,5 kcal/mol, S°(LaAlCl6,f,298) = 61 ±2,5 cal/K-mol,Δ(LaAl3Cl12,g ,298) =-712 ± 7 kcal/mol, S°(LaAl3Cl12,g,298) = 205 ± 3 cal/K-mol.

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3

Glaum, R., and R. Gruehn. "Beitr�ge zum thermischen Verhalten wasserfreier Phosphate. III. Zum chemischen Transport von Phosphaten des drei- und vierwertigen Titans." Zeitschrift f�r anorganische und allgemeine Chemie 580, no. 1 (January 1990): 78–94. http://dx.doi.org/10.1002/zaac.19905800110.

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4

Oppermann, H., H. Dao Quoc, and M. Zhang-Preβe. "Thermisches und kalorisches Verhalten von festem LaAl3Br12 und chemischer Transport von LaBr3 mit AlBr3 / Thermical and Calorical Behaviour of Solid LaAl3Br12 and Chemical Transport of LaBr3 with AlBr3." Zeitschrift für Naturforschung B 56, no. 9 (September 1, 2001): 908–16. http://dx.doi.org/10.1515/znb-2001-0908.

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Abstract The thermodynamical data of solid Lanthanum Aluminium Bromide LaAl3Br12 have been obtained by determination of the decomposition equilibria from total pressure measurements. For different compositions LaBr3/AlBr3, the barogram of the binary system LaBr3-AlBr3 was constructed and from this and DTA the melting diagram was determined. The chemical trans port of LaBr3 with AlBr3 is suggesting the existence of two gaseous complexes LaAl3Br12 and LaAl2Br9.The data are:ΔH°B(LaAl3Br12,f,298) =-587,2 ± 7 kcal/mol, S°(LaAl3Br12,f,298) = 179,3 ± 7 cal/K·mol;ΔH°B(LaAl3Br12,g,298) =-548,7 ± 5 kcal/mol, S°(LaAl3Br12,g,298) = 239,4 ± 6 cal/K·mol;ΔH°B(LaAl2Br9,g,298) =-619,7 ± 5,5 kcal/mol, S°(LaAl2Br9,g,298) = 212,0 ± 7 cal/K·mol.From solution calorimetric measurements follows the enthalpy of formation of the solid complexes: ΔH°B(LaAl3Br12,f,298) =-590,9 ± 3 kcal/mol.

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5

Schaffrath, U., and R. Gruehn. "Nd7,33Ta8O28CI6 — ein Zwischenprodukt des thermischen Abbaus von Nd2Ta2O7Cl2: Präparation, Struktur und magnetische Eigenschaften / Nd7,33Ta8O28Cl6 — an Intermediate Product of the Thermal Decomposition of Nd2Ta2O7Cl2: Preparation, Crystal Structure and Magnetic Properties." Zeitschrift für Naturforschung B 43, no. 12 (December 1, 1988): 1567–74. http://dx.doi.org/10.1515/znb-1988-1208.

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Abstract Single crystals of the new oxochlorotantalate Nd7.33Ta8O28Cl6, could be obtained only by chemical transport reactions (T2 → T1; T2 - 1000 °C, T, = 900 °C) with mixtures of Cl2/TaCl5 as transport agent. NdTaO4 was chosen as the starting material. A direct preparative route to Nd7.33Ta8O28Cl6 from binary and ternary components, however, was not successful. Nd7.33Ta8O28Cl6 , crystallizes in the space group Cmmm with a = 10.3381(8) Å, b = 18.865(1) Å, c - 3.9152(3) A; Z = 1. The structure was refined to R - 4.42%, R w = 2.76%. Main building units are pairs of edge-sharing TaO6 -octahedra which are connected with threefold capped trigonal prisms around Nd. Especially remarkable is one Nd position with an occupation factor of 0.833. The relationship of this new structure type with Nd2Ta2O7Cl2 is considered. Furthermore, we have measured the magnetic susceptibilities of both Nd-compounds in a temperature range from 3,6 to 251,3 K. The results are compared with calculated data.

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6

Dahmen [2], T., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Sulfaten. XV [1]. Zum chemischen Transport von Al2(SO4)3 mit SOCl2. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 621, no. 3 (March 1995): 417–23. http://dx.doi.org/10.1002/zaac.19956210314.

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7

Ross, R., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Oxoniobaten der �bergangsmetalle. II. Zum chemischen Transport von MnNb2O6 mit Cl2 und NH4Cl. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 596, no. 1 (April 1991): 172. http://dx.doi.org/10.1002/zaac.19915960123.

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8

Ro�, R., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Oxoniobaten der �bergangsmetalle. V. Zum Chemischen Transport von NiNb2O6 mit Cl2 und NH4Cl. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 614, no. 8 (August 1992): 47–52. http://dx.doi.org/10.1002/zaac.19926140810.

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9

Ro�, R., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Oxoniobaten der �bergangsmetalle. IV. Zum Chemischen Transport von CoNb2O6 mit Cl2, NH4 und HgCl2. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 612, no. 6 (June 1992): 63–71. http://dx.doi.org/10.1002/zaac.19926120112.

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10

Krause, M., T. Dahmen, and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Sulfaten. XII. Zum chemischen Transport von In2(SO4)3 mit Cl2 und mit HCl. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 620, no. 4 (April 1994): 672–81. http://dx.doi.org/10.1002/zaac.19946200416.

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11

Dahmen, T., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Sulfaten. XIII. Zum chemischen Transport von Cr2(SO4)3 mit Cl2 und mit HCl. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 620, no. 9 (September 1994): 1569–77. http://dx.doi.org/10.1002/zaac.19946200913.

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12

Krause, M., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Sulfaten. XVI. Zum chemischen Transport von Ga2(SO4)3 mit Cl2 und mit HCl. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 621, no. 6 (June 1995): 1007–14. http://dx.doi.org/10.1002/zaac.19956210619.

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13

Salvadori, Simone, Mauro Carnevale, Alessia Fanciulli, and Francesco Montomoli. "Uncertainty Quantification of Non-Dimensional Parameters for a Film Cooling Configuration in Supersonic Conditions." Fluids 4, no. 3 (August 10, 2019): 155. http://dx.doi.org/10.3390/fluids4030155.

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In transonic high-pressure turbine stages, oblique shocks originating from vane trailing edges impact the suction side of each adjacent vane. High-pressure vanes are cooled to tolerate the combustor exit-temperature levels, then it is highly probable that shock impingement will occur in proximity to a row of cooling holes. The presence of such a shock, together with the inevitable manufacturing deviations, alters the location of the shock impingement and of the performance parameters of each cooling hole. The present work provides a general description of the aero-thermal field that occurs on the rear suction side of a cooled vane. Computational Fluid Dynamics (CFD) is used to evaluate the deterministic response of the selected configurations in terms of adiabatic effectiveness, discharge coefficient, blowing ratio, density ratio, and momentum ratio. Turbulence is modelled by using both the Shear Stress Transport method (SST) and the Reynolds Stress Model (RSM) implemented in ANSYS ® FLUENT ® . The obtained results are compared with the experimental data obtained by the Institut für Thermische Strömungsmaschinen in Karlsruhe. Two uncertainty quantification methodologies based on Hermite polynomials and Padè–Legendre approximants are used to consider the probability distribution of the geometrical parameters and to evaluate the response surfaces for the system response quantities. Trailing-edge and cooling-hole diameters have been considered to be aleatory unknowns. Uncertainty quantification analysis allows for the assessment of the mutual effects on global and local parameters of the cooling device. Obtained results demonstrate that most of the parameters are independent by the variation of the aleatory unknowns while the standard deviation of the blowing ratio associated with the hole diameter uncertainty is around 12 % , with no impact by the trailing-edge thickness. No relevant advantages are found using either SST model or RSM in combination with Hermite polynomials and Padè–Legendre approximants.

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14

Ross, R., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Oxoniobaten der �bergangsmetalle. II [1, 2]. Zum Chemischen Transport von MnNb2O6 mit Cl2 und NH4Cl. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 605, no. 1 (November 1991): 75–85. http://dx.doi.org/10.1002/zaac.19916050109.

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15

Schmidt, P., O. Bosholm, and H. Oppermann. "Untersuchungen zum ternären System Bi/Te/O, II. Thermisches Verhalten und Koexistenzbeziehungen von Bi2O2Te/Investigations of the Ternary System Bi/Te/O, II. The Thermal Behaviour and the Relations of Phase Coexistences of Bi2O2Te." Zeitschrift für Naturforschung B 52, no. 12 (December 1, 1997): 1461–66. http://dx.doi.org/10.1515/znb-1997-1204.

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Abstract The phase Bi2O2Te exists in the pseudobinary system Bi2O3/Bi2Te3. The thermal behaviour of Bi2O2Te was determined by DTA and X-ray analysis: The phase exists up to 620 °C and decomposes into the solid phases Bi12TeO20, Bi10Te2O19 [1] and liquid BiTe. The relations of the phase coexistences in the pseudobinary system and in the ternary area Bi2O3/TeO2/Bi2Te3/Te were investigated by solid state reactions, chemical transport reactions, and by total pressure measurements.

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16

Dahmen, T., and R. Gruehn. "Beitr�ge zum thermischen Verhalten von Sulfaten. VIII. Zum chemischen Transport von FeSO4 mit NH4Cl und von von Fe2(SO4)3 mit Cl2 oder NH4Cl. Experimente und Modellrechnungen." Zeitschrift f�r anorganische und allgemeine Chemie 609, no. 3 (March 1992): 139–49. http://dx.doi.org/10.1002/zaac.19926090325.

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17

Glaum, R., M. Walter-Peter, D. �zalp, and R. Gruehn. "Beitr�ge zum thermischen Verhalten wasserfreier Phosphate. IV. Zum chemischen Transport von Pyrophosphaten M2P2O7 (M = Mg, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd) - Die erstmalige Darstellung von Chrom(II)-pyrophosphat." Zeitschrift f�r anorganische und allgemeine Chemie 601, no. 1 (August 1991): 145–62. http://dx.doi.org/10.1002/zaac.19916010117.

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18

Schöneborn, M., W. Hoffbauer, J. Schmedt auf der Günne, and R. Glaum. "Beiträge zur Kristallchemie und zum thermischen Verhalten von wasserfreien Phosphaten, XXXVII [1]. Synthese, Kristallstruktur und kernresonanzspektroskopische Untersuchung von In2Ti6(PO4)6[Si2O(PO4)6] – Eine Hybride aus den NASICON und M4[Si2O(PO4)6] Strukturtypen / Contributions on Crystal Chemistry and Thermal Behaviour of Anhydrous Phospates, XXXVII [1]. Synthesis, Crystal Structure and Nuclear Magnetic Resonance Investigation of In2Ti6(PO4)6- [Si2O(PO4)6] – A Hybride Built from Layers with NASICON and M4[Si2O(PO4)6] Structures." Zeitschrift für Naturforschung B 61, no. 6 (June 1, 2006): 741–48. http://dx.doi.org/10.1515/znb-2006-0614.

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In2Ti6(PO4)6[Si2O(PO4)6] has been obtained by heating (1100 °C) stoichiometric amounts of In2O3, SiP2O7, TiP2O7, and TiO2 in air. Colourless crystals of the phosphate-silicophosphate suitable for a single crystal structure investigation have been grown by chemical vapour transport (1000°C → 900°C, mixture of 70 mg PtCl2 and 3.5 mg TiP as transport agent). In2Ti6(PO4)6[Si2O(PO4)6] adopts its own structure type (R3̅ (No. 148), Z = 3, a = 8.4380(10) Å , c = 44.295(1) Å , 1809 independent reflections, 109 variables, R1 = 0.044, wR2 = 0.112). The crystal structure represents a hybride built up from alternating layers (⟂ to the c-axis) of the NASICON structure-type and those showing the structure of silicophosphates M4[Si2O(PO4)6]. Isolated heteropolyanions [Si2O(PO4)6]12− and double-octahedra [InIIITiIVO9] occur as coordination polyhedra besides isolated octahedra [TiIVO6] and tetrahedral phosphate groups. The results of 29Si and 31P-MAS-NMR studies are in agreement with one crystallographically independent site for silicon and two sites for phosphorus. The phosphorus resonances can be related to the two sites by 2-dimensional cross-polarisation experiments, by the anisotropies of their chemical shifts, and by the observed line widths. All criteria lead to the same assignment. Substitution of In3+ by several trivalent transition metal ions leads to phosphate-silicophosphates M2Ti6(PO4)6[Si2O(PO4)6] (M = Ti3+, V3+, Cr3+, Fe3+)

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