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Marcelle Gauneescard - One of the best experts on this subject based on the ideXlab platform.

  • Phase diagram of the tbbr3 csbr binary system thermodynamic and transport properties of the cs3tbbr6 compound
    Calphad-computer Coupling of Phase Diagrams and Thermochemistry, 2012
    Co-Authors: Leszek Rycerz, Ida Chojnacka, Jan Kapala, Marcelle Gauneescard
    Abstract:

    Abstract Phase equilibria in the TbBr 3 –CsBr binary system were established from Differential Scanning Calorimetry (DSC) measurements. This binary system is characterized by three compounds, namely Cs 3 TbBr 6 , Cs 3 Tb 2 Br 9 and CsTb 2 Br 7 , and two eutectics located at the TbBr 3 mole fraction, x = 0.095 (865 K) and x = 0.552 (808 K), respectively. Cs 3 TbBr 6 undergoes a solid–solid Phase Transition at 728 K and melts congruently at 1083 K with the related enthalpies 8.4 and 60.6 kJ mol −1 , respectively. Cs 3 Tb 2 Br 9 , decomposes peritectically at 879 K, whereas CsTb 2 Br 9 forms from Cs 3 Tb 2 Br 9 and TbBr 3 at 776 K and melts incongruently at 846 K. It undergoes also a solid–solid Phase Transition at 805 K, temperature very close to that (808 K) of the Cs 3 Tb 2 Br 9 –CsTb 2 Br 7 eutectic. Separate investigations of the thermodynamic and transport properties were performed on the Cs 3 TbBr 6 compound. These heat capacity and electrical conductivity experimental results suggest an order–disorder mechanism in the alkali metal cation sublattice whereas the TbBr 6 octahedra, forming the anionic sublattice, retain their normal lattice positions. Compatibility of the experimental data was tested by the CALPHAD method. The entropy of mixing and Gibbs energies of formation of solid compounds were calculated. The temperature range of Cs 3 TbBr 6 existence was discussed.

  • Phase diagram and electrical conductivity of the dybr3 rbbr binary system
    Journal of Thermal Analysis and Calorimetry, 2012
    Co-Authors: Ida Chojnacka, Leszek Rycerz, Madjid Berkani, Marcelle Gauneescard
    Abstract:

    Phase equilibrium in the DyBr3–RbBr binary system was established from differential scanning calorimetry measurements. This system exhibits three compounds, namely Rb3DyBr6, Rb2DyBr5, and RbDy2Br7, and two eutectics located at DyBr3 molar fraction x = 0.116 (T = 886 K) and x = 0.458 (T = 702 K), respectively. Rb3DyBr6 undergoes a solid–solid Phase Transition at 726 K and melts congruently at 1,059 K. Rb2DyBr5 and RbDy2Br7 melt incongruently at 737 and 748 K, respectively. The electrical conductivity of DyBr3–RbBr liquid mixtures was measured over the whole composition range. Results obtained are discussed in term of possible complex formation.

  • Phase diagram and electrical conductivity of the cebr3 csbr binary system
    Journal of Thermal Analysis and Calorimetry, 2009
    Co-Authors: Leszek Rycerz, E Ingierstocka, Marcelle Gauneescard
    Abstract:

    Phase equilibrium in the CeBr3–CsBr binary system was established from differential scanning calorimetry (DSC). This system includes three compounds, namely Cs3CeBr6, Cs2CeBr5 and CsCe2Br7; and three eutectics located at CeBr3 molar fraction x = 0.125; 0.459 and 0.700, respectively. Cs3CeBr6 undergoes a solid–solid Phase Transition at 712 K and melts congruently at 1034 K. Cs2CeBr5 decomposes in the solid state into Cs3CeBr6 and CsCe2Br7 at 685 K. The third compound, CsCe2Br7, melts congruently at 877 K. The electrical conductivity of CeBr3–CsBr liquid mixtures was measured down to temperatures below solidification over the whole composition range. Results obtained are discussed in term of possible complex formation.

  • Phase diagram and electrical conductivity of the cebr3 rbbr binary system
    Journal of Alloys and Compounds, 2008
    Co-Authors: Leszek Rycerz, E Ingierstocka, Slobodan Gadzuric, Marcelle Gauneescard
    Abstract:

    Phase equilibrium in the CeBr3–CsBr binary system was established from differential scanning calorimetry (DSC). This system includes three compounds, namely Cs3CeBr6, Cs2CeBr5 and CsCe2Br7; and three eutectics located at CeBr3 molar fraction x = 0.125; 0.459 and 0.700, respectively. Cs3CeBr6 undergoes a solid–solid Phase Transition at 712 K and melts congruently at 1034 K. Cs2CeBr5 decomposes in the solid state into Cs3CeBr6 and CsCe2Br7 at 685 K. The third compound, CsCe2Br7, melts congruently at 877 K. The electrical conductivity of CeBr3–CsBr liquid mixtures was measured down to temperatures below solidification over the whole composition range. Results obtained are discussed in term of possible complex formation.

  • Phase diagram of the tbbr3 rbbr binary system thermodynamic and transport properties of the rb3tbbr6 compound
    Inorganic Chemistry, 2007
    Co-Authors: Leszek Rycerz, Marcelle Gauneescard
    Abstract:

    Phase equilibria in the TbBr 3 -RbBr binary system were established from differential scanning calorimetry (DSC) measurements. This binary system is characterized by two compounds, namely Rb 3 TbBr 6 and RbTb2Br 7 , and two eutectics located at the TbBr 3 mole fractions, x = 0.117 (728 K) and x = 0.449 (718 K), respectively. Rb 3 TbBr 6 undergoes a Solid-Solid Phase Transition at 728 K and melts congruently at 1047 K with the related enthalpies 7.8 and 58.7 kJ mol -1 , respectively. RbTb 2 Br 7 melts incongruently at 803 K. It undergoes also a Solid-Solid Phase Transition at 712 K, a temperature very close to that (718 K) of the second eutectic, and much attention was paid in evidencing and separating these Transition and eutectic effects. Separate investigations of the thermodynamic and transport properties were performed on the Rb 3 TbBr 6 compound. These heat capacity and electrical conductivity experimental results suggest an order-disorder mechanism in the alkali-metal cation sublattice whereas the TbBr 6 octahedra, forming the anionic sublattice, retain their normal lattice positions.

Leszek Rycerz - One of the best experts on this subject based on the ideXlab platform.

  • Phase diagram of the tbbr3 csbr binary system thermodynamic and transport properties of the cs3tbbr6 compound
    Calphad-computer Coupling of Phase Diagrams and Thermochemistry, 2012
    Co-Authors: Leszek Rycerz, Ida Chojnacka, Jan Kapala, Marcelle Gauneescard
    Abstract:

    Abstract Phase equilibria in the TbBr 3 –CsBr binary system were established from Differential Scanning Calorimetry (DSC) measurements. This binary system is characterized by three compounds, namely Cs 3 TbBr 6 , Cs 3 Tb 2 Br 9 and CsTb 2 Br 7 , and two eutectics located at the TbBr 3 mole fraction, x = 0.095 (865 K) and x = 0.552 (808 K), respectively. Cs 3 TbBr 6 undergoes a solid–solid Phase Transition at 728 K and melts congruently at 1083 K with the related enthalpies 8.4 and 60.6 kJ mol −1 , respectively. Cs 3 Tb 2 Br 9 , decomposes peritectically at 879 K, whereas CsTb 2 Br 9 forms from Cs 3 Tb 2 Br 9 and TbBr 3 at 776 K and melts incongruently at 846 K. It undergoes also a solid–solid Phase Transition at 805 K, temperature very close to that (808 K) of the Cs 3 Tb 2 Br 9 –CsTb 2 Br 7 eutectic. Separate investigations of the thermodynamic and transport properties were performed on the Cs 3 TbBr 6 compound. These heat capacity and electrical conductivity experimental results suggest an order–disorder mechanism in the alkali metal cation sublattice whereas the TbBr 6 octahedra, forming the anionic sublattice, retain their normal lattice positions. Compatibility of the experimental data was tested by the CALPHAD method. The entropy of mixing and Gibbs energies of formation of solid compounds were calculated. The temperature range of Cs 3 TbBr 6 existence was discussed.

  • Phase diagram and electrical conductivity of the dybr3 rbbr binary system
    Journal of Thermal Analysis and Calorimetry, 2012
    Co-Authors: Ida Chojnacka, Leszek Rycerz, Madjid Berkani, Marcelle Gauneescard
    Abstract:

    Phase equilibrium in the DyBr3–RbBr binary system was established from differential scanning calorimetry measurements. This system exhibits three compounds, namely Rb3DyBr6, Rb2DyBr5, and RbDy2Br7, and two eutectics located at DyBr3 molar fraction x = 0.116 (T = 886 K) and x = 0.458 (T = 702 K), respectively. Rb3DyBr6 undergoes a solid–solid Phase Transition at 726 K and melts congruently at 1,059 K. Rb2DyBr5 and RbDy2Br7 melt incongruently at 737 and 748 K, respectively. The electrical conductivity of DyBr3–RbBr liquid mixtures was measured over the whole composition range. Results obtained are discussed in term of possible complex formation.

  • Phase diagram and electrical conductivity of the cebr3 csbr binary system
    Journal of Thermal Analysis and Calorimetry, 2009
    Co-Authors: Leszek Rycerz, E Ingierstocka, Marcelle Gauneescard
    Abstract:

    Phase equilibrium in the CeBr3–CsBr binary system was established from differential scanning calorimetry (DSC). This system includes three compounds, namely Cs3CeBr6, Cs2CeBr5 and CsCe2Br7; and three eutectics located at CeBr3 molar fraction x = 0.125; 0.459 and 0.700, respectively. Cs3CeBr6 undergoes a solid–solid Phase Transition at 712 K and melts congruently at 1034 K. Cs2CeBr5 decomposes in the solid state into Cs3CeBr6 and CsCe2Br7 at 685 K. The third compound, CsCe2Br7, melts congruently at 877 K. The electrical conductivity of CeBr3–CsBr liquid mixtures was measured down to temperatures below solidification over the whole composition range. Results obtained are discussed in term of possible complex formation.

  • Phase diagram and electrical conductivity of the cebr3 rbbr binary system
    Journal of Alloys and Compounds, 2008
    Co-Authors: Leszek Rycerz, E Ingierstocka, Slobodan Gadzuric, Marcelle Gauneescard
    Abstract:

    Phase equilibrium in the CeBr3–CsBr binary system was established from differential scanning calorimetry (DSC). This system includes three compounds, namely Cs3CeBr6, Cs2CeBr5 and CsCe2Br7; and three eutectics located at CeBr3 molar fraction x = 0.125; 0.459 and 0.700, respectively. Cs3CeBr6 undergoes a solid–solid Phase Transition at 712 K and melts congruently at 1034 K. Cs2CeBr5 decomposes in the solid state into Cs3CeBr6 and CsCe2Br7 at 685 K. The third compound, CsCe2Br7, melts congruently at 877 K. The electrical conductivity of CeBr3–CsBr liquid mixtures was measured down to temperatures below solidification over the whole composition range. Results obtained are discussed in term of possible complex formation.

  • Phase diagram of the tbbr3 rbbr binary system thermodynamic and transport properties of the rb3tbbr6 compound
    Inorganic Chemistry, 2007
    Co-Authors: Leszek Rycerz, Marcelle Gauneescard
    Abstract:

    Phase equilibria in the TbBr 3 -RbBr binary system were established from differential scanning calorimetry (DSC) measurements. This binary system is characterized by two compounds, namely Rb 3 TbBr 6 and RbTb2Br 7 , and two eutectics located at the TbBr 3 mole fractions, x = 0.117 (728 K) and x = 0.449 (718 K), respectively. Rb 3 TbBr 6 undergoes a Solid-Solid Phase Transition at 728 K and melts congruently at 1047 K with the related enthalpies 7.8 and 58.7 kJ mol -1 , respectively. RbTb 2 Br 7 melts incongruently at 803 K. It undergoes also a Solid-Solid Phase Transition at 712 K, a temperature very close to that (718 K) of the second eutectic, and much attention was paid in evidencing and separating these Transition and eutectic effects. Separate investigations of the thermodynamic and transport properties were performed on the Rb 3 TbBr 6 compound. These heat capacity and electrical conductivity experimental results suggest an order-disorder mechanism in the alkali-metal cation sublattice whereas the TbBr 6 octahedra, forming the anionic sublattice, retain their normal lattice positions.

S. Wróbel - One of the best experts on this subject based on the ideXlab platform.

  • Phase Transitions of polycrystalline [Fe(H_2O)_6](ClO_4)_3 and [Cr(H_2O)_6](ClO_4)_3 studied by DSC
    Journal of Thermal Analysis and Calorimetry, 2004
    Co-Authors: E. Mikuli, B. Grad, K. Zaremba, S. Wróbel
    Abstract:

    Fourier transform far- and mid-infrared (FT-FIR and FT-MIR) and Fourier transform Raman scattering (FT-RS) spectra of [Fe(H_2O)_6](ClO_4)_3 and [Cr(H_2O)_6](ClO_4)_3 indicate that these compounds are ionic molecular crystals built from complex cations and complex anions of octahedral ( T _h) and tetrahedral ( T _d) symmetry, respectively. The thermodynamic parameters for two Phase Transitions in polycrystalline [Fe(H_2O)_6](ClO_4)_3 and [Cr(H_2O)_6](ClO_4)_3 were determined by differential scanning calorimetry (DSC): melting of the crystals (at T _m=359.2 and 363.1 K) and Solid-Solid Phase Transition (at T _C1=126.5 and 139.4 K), respectively.

J C Kieffer - One of the best experts on this subject based on the ideXlab platform.

  • femtosecond structural dynamics in vo2 during an ultrafast solid solid Phase Transition
    Physical Review Letters, 2001
    Co-Authors: A Cavalleri, Cs Toth, C W Siders, Jeff Squier, F Raksi, Patrick Forget, J C Kieffer
    Abstract:

    Femtosecond x-ray and visible pulses were used to probe structural and electronic dynamics during an optically driven, Solid-Solid Phase Transition in VO(2). For high interband electronic excitation (approximately 5 x 10(21) cm(-3)), a subpicosecond transformation into the high-T, rutile Phase of the material is observed, simultaneous with an insulator-to-metal Transition. The fast time scale observed suggests that, in this regime, the structural Transition may not be thermally initiated.

  • femtosecond structural dynamics in vo2 during an ultrafast solid solid Phase Transition
    Physical Review Letters, 2001
    Co-Authors: A Cavalleri, Cs Toth, C W Siders, Jeff Squier, F Raksi, Patrick Forget, J C Kieffer
    Abstract:

    Femtosecond x-ray and visible pulses were used to probe structural and electronic dynamics during an optically driven, Solid-Solid Phase Transition in ${\mathrm{VO}}_{2}$. For high interband electronic excitation $(\ensuremath{\sim}5\ifmmode\times\else\texttimes\fi{}{10}^{21}{\mathrm{cm}}^{\ensuremath{-}3})$, a subpicosecond transformation into the high- $T$, rutile Phase of the material is observed, simultaneous with an insulator-to-metal Transition. The fast time scale observed suggests that, in this regime, the structural Transition may not be thermally initiated.

Takanori Ichiki - One of the best experts on this subject based on the ideXlab platform.

  • Novel Microfluidic Valve Technology Based on Shape Memory Effect of Poly(ε-caprolactone)
    Applied Physics Express, 2013
    Co-Authors: Hiroaki Takehara, Chenyang Jiang, Mitsuhiro Ebara, Takao Aoyagi, Takanori Ichiki
    Abstract:

    Novel microfluidic valves based on the solid–solid Phase Transition of a thermally responsive shape-memory polymer (SMP) have been developed. Both normally open and normally closed valves were constructed and satisfactory performances were obtained, such as an actuation time of 108 ms, a minimum necessary power of 65 mW, and a withstanding pressure of (1.1±0.3)×102 kPa. Only a small energy of 44 mJ was required to release the stored energy for valve actuation. This SMP microfluidic valve fulfills most requirements for the implementation into disposable polymer chips and thus is expected to contribute to the practical use of microfluidic devices.

  • novel microfluidic valve technology based on shape memory effect of poly e caprolactone
    Applied Physics Express, 2013
    Co-Authors: Hiroaki Takehara, Chenyang Jiang, Mitsuhiro Ebara, Takao Aoyagi, Takanori Ichiki
    Abstract:

    Novel microfluidic valves based on the solid–solid Phase Transition of a thermally responsive shape-memory polymer (SMP) have been developed. Both normally open and normally closed valves were constructed and satisfactory performances were obtained, such as an actuation time of 108 ms, a minimum necessary power of 65 mW, and a withstanding pressure of (1.1±0.3)×102 kPa. Only a small energy of 44 mJ was required to release the stored energy for valve actuation. This SMP microfluidic valve fulfills most requirements for the implementation into disposable polymer chips and thus is expected to contribute to the practical use of microfluidic devices.