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Barium Hydroxide

The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform

J E Crow – 1st expert on this subject based on the ideXlab platform

  • Ten Minute Preparation Of Yba 2 Cu 3 O 7−x Using Barium Hydroxide
    MRS Proceedings, 2011
    Co-Authors: N Coppa, A Kebede, J Schwegler, I Perez, R E Salomon, G H Myer, J E Crow

    Abstract:

    High quality bulk YBa 2 CuO x−7 was synthesized by fusing stoichiometric amounts of yttrium and copper nitrates and Barium Hydroxide, in air, using an ordinary Bunsen burner. The starting materials go through a short-lived liquid phase yielding a solid black product which was subsequently heat treated, (900 C, 18–24 h, in air, followed by 500 C, 5 h., in O 2 ). These materials were greater than 99% phase pure with CuO as the only other phase and they exhibited a transition temperature of 92 K, a 15.5% perfect diamagnetic response (field cooled), 76% (zero field cooled). This synthesis represents an improvement over the much more labor and time intensive conventional methods in that it allows high quality materials of various compositions to be prepared quickly

  • preparation of yba 2 cu 3 o 7 x using Barium Hydroxide flux
    Journal of Materials Research, 1990
    Co-Authors: N Coppa, A Kebede, J Schwegler, I Perez, R E Salomon, G H Myer, J E Crow

    Abstract:

    High quality bulk YBa 2 Cu 3 O 7− x was synthesized by fusing stoichiometric amounts of yttrium and copper nitrates and Barium Hydroxide in air, using an ordinary Bunsen burner. The starting materials go through a short-lived liquid phase yielding a solid black product which was subsequently heat treated (900 °C, 18–24 h in air, followed by 500 °C, 5 h in O 2 ). These materials were greater than 99% phase pure with CuO as the only other phase and they exhibited a transition temperature of 92 K, a 15.5% perfect diamagnet response (field cooled). This synthesis represents an improvement over the much more labor and time intensive conventional methods in that it allows high quality materials of various compositions to be prepared quickly.

  • Preparation of YBa 2 Cu 3 O 7− x using Barium Hydroxide flux
    Journal of Materials Research, 1990
    Co-Authors: N Coppa, A Kebede, J Schwegler, I Perez, R E Salomon, G H Myer, J E Crow

    Abstract:

    High quality bulk YBa 2 Cu 3 O 7− x was synthesized by fusing stoichiometric amounts of yttrium and copper nitrates and Barium Hydroxide in air, using an ordinary Bunsen burner. The starting materials go through a short-lived liquid phase yielding a solid black product which was subsequently heat treated (900 °C, 18–24 h in air, followed by 500 °C, 5 h in O 2 ). These materials were greater than 99% phase pure with CuO as the only other phase and they exhibited a transition temperature of 92 K, a 15.5% perfect diamagnet response (field cooled). This synthesis represents an improvement over the much more labor and time intensive conventional methods in that it allows high quality materials of various compositions to be prepared quickly.

Sang Shangbin – 2nd expert on this subject based on the ideXlab platform

  • Studies by XRD on discharge products of negative electrode in Zn-Ni battery
    Chinese Battery Industry, 2020
    Co-Authors: Sang Shangbin

    Abstract:

    The compound of calcium zincate,of which the composition was Ca(OH)_2·2Zn(OH)_2·2H_2O,was prepared by a chemical method.The crystal structure was verified by XRD.The mixture of zinc oxide and Barium Hydroxide was prepared by a mechanical method.The calcium zincate and the mixture of zinc oxide and Barium Hydroxide were used for active materials in negative electrode of Zn-Ni battery.The mock up Zn-Ni battery was assembled.The morphology changes of discharge productions of active materials in cathode and the changing trend of quantity of components were studied by XRD.The results of XRD showed that,in negative electrode whose active materials was prepared by the calcium zincate,when battery was discharged,the discharge products — zinc oxide partly changed into calcium zincate by combining with calcium Hydroxide;in cathode whose active materials was prepared by the mixture of zinc oxide and Barium Hydroxide,Barium Hydroxide changed into Barium carbonate by combining with carbon dioxide which was dissolved in electrolyte and zinc oxide can not combine with Barium Hydroxide and it was dissolved in electrolyte quickly.

  • Studies on negative electrode of Zn-Ni battery by means of XRD
    Chinese Journal of Power Sources, 2020
    Co-Authors: Sang Shangbin

    Abstract:

    The compound of calcium zincate, of which the composition was Ca(OH)2·2 Zn(OH)2·2 H2O,was prepared by a chemical method. The crystal structure was verified by XRD. The mixture of zinc oxide and Barium Hydroxide was prepared by a mechanical method. The calcium zincate and the mixture of zinc oxide and Barium Hydroxide were used for active materials as negative electrode of Zn-Ni battery. The simulated Zn-Ni battery was assembled. The morphology changes of discharged productions of active materials in cathode and the changed current of quantity of components were studied by XRD. The results showed cathodic active materials were prepared by the calcium zincate , the discharged production zinc oxide partly changed into calcium zincate by combining with calcium Hydroxide; while cathodic active materials were prepared by the mixture of zinc oxide and Barium Hydroxide, Barium Hydroxide changed into Barium carbonate by combining with carbon dioxide which was dissolved in electrolyte and zinc oxide could not combine with Barium Hydroxide and dissolved in electrolyte quickly .

Per J Liesen – 3rd expert on this subject based on the ideXlab platform

  • microwave accelerated crossed cannizzaro reaction using Barium Hydroxide under solvent free conditions
    Tetrahedron Letters, 1998
    Co-Authors: Rajender S Varma, Kannan P Naicker, Per J Liesen

    Abstract:

    Abstract A solventless and expeditious method for the preparation of alcohols is described from aldehydes using Barium Hydroxide, Ba(OH)2.8H2O, and paraformaldehyde. A comparison of this microwave-accelerated Cannizzaro reaction to the one under conventional heating mode is also reported.