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M Kaddami - One of the best experts on this subject based on the ideXlab platform.

  • solubility study at high Phosphorus Pentoxide concentration in ternary system caco3 p2o5 h2o at 25 35 and 70 c
    Fluid Phase Equilibria, 2018
    Co-Authors: Z Bakher, M Kaddami
    Abstract:

    Abstract The concentered region of the C a C O 3 _ P 2 O 5 _ H 2 O ternary system was investigated at 25,35 and 70 °C using Schreinemaker's method and synthetic method based on conductivity measurement. The characterization of stable solid phase was realized by X-ray diffraction and complexometric titration, which shows the presence of three solids stable region C a ( H 2 P O 4 ) 2 . H 2 O _ C a ( H 2 P O 4 ) 2 _ C a H P O 4 in the three isotherms. H 3 P O 4 . 1 2 H 2 O presents stable equilibria with liquid and C a ( H 2 P O 4 ) 2 at 25 °C, these equilibria do not occur at 35 and 70 °C. Equilibrium zone between H 3 P O 4 and C a ( H 2 P O 4 ) 2 was determined at 25 and 35 °C but disappeared at 70 °C. The limits between different regions were determined by the titration of the phosphoric acid (H3PO4) and calcium cation (Ca2+) concentrations in the liquid phase.

  • thermodynamic equilibrium study of Phosphorus Pentoxide water binary system the stability and solubility of 10h3po4 h2o
    Calphad-computer Coupling of Phase Diagrams and Thermochemistry, 2018
    Co-Authors: Z Bakher, M Kaddami
    Abstract:

    Abstract In this study, new experimental data for the binary system of water–Phosphorus Pentoxide are presented in the temperature range from 235.15 to 302.15 K using the conductimetric method, this synthetic method was successfully and effectively used to define the branches of stable solubility of several complex systems. In this work, two hydrates 2H3PO4·H2O (semi-hydrate) and 10H3PO4.H2O (deci-hydrate) were identified and characterized by X ray diffraction and volumetric titration with discussion of their stability zone. Thermodynamic modeling of solid-liquid equilibrium in the binary system of P2O5–H2O is also presented based on this experimental solubility data using a modified electrolytic Uniquac model (Extended Universal Quasichimical model).

William J Marshall - One of the best experts on this subject based on the ideXlab platform.

Z Bakher - One of the best experts on this subject based on the ideXlab platform.

  • solubility study at high Phosphorus Pentoxide concentration in ternary system caco3 p2o5 h2o at 25 35 and 70 c
    Fluid Phase Equilibria, 2018
    Co-Authors: Z Bakher, M Kaddami
    Abstract:

    Abstract The concentered region of the C a C O 3 _ P 2 O 5 _ H 2 O ternary system was investigated at 25,35 and 70 °C using Schreinemaker's method and synthetic method based on conductivity measurement. The characterization of stable solid phase was realized by X-ray diffraction and complexometric titration, which shows the presence of three solids stable region C a ( H 2 P O 4 ) 2 . H 2 O _ C a ( H 2 P O 4 ) 2 _ C a H P O 4 in the three isotherms. H 3 P O 4 . 1 2 H 2 O presents stable equilibria with liquid and C a ( H 2 P O 4 ) 2 at 25 °C, these equilibria do not occur at 35 and 70 °C. Equilibrium zone between H 3 P O 4 and C a ( H 2 P O 4 ) 2 was determined at 25 and 35 °C but disappeared at 70 °C. The limits between different regions were determined by the titration of the phosphoric acid (H3PO4) and calcium cation (Ca2+) concentrations in the liquid phase.

  • thermodynamic equilibrium study of Phosphorus Pentoxide water binary system the stability and solubility of 10h3po4 h2o
    Calphad-computer Coupling of Phase Diagrams and Thermochemistry, 2018
    Co-Authors: Z Bakher, M Kaddami
    Abstract:

    Abstract In this study, new experimental data for the binary system of water–Phosphorus Pentoxide are presented in the temperature range from 235.15 to 302.15 K using the conductimetric method, this synthetic method was successfully and effectively used to define the branches of stable solubility of several complex systems. In this work, two hydrates 2H3PO4·H2O (semi-hydrate) and 10H3PO4.H2O (deci-hydrate) were identified and characterized by X ray diffraction and volumetric titration with discussion of their stability zone. Thermodynamic modeling of solid-liquid equilibrium in the binary system of P2O5–H2O is also presented based on this experimental solubility data using a modified electrolytic Uniquac model (Extended Universal Quasichimical model).

Hyunjoo Koo - One of the best experts on this subject based on the ideXlab platform.

Wei Guo - One of the best experts on this subject based on the ideXlab platform.

  • joining high volume fraction sic particle reinforced aluminum matrix composites sicp al by low melting point stannous oxide zinc oxide Phosphorus Pentoxide glass
    Ceramics International, 2020
    Co-Authors: Wei Guo, Jing Hou, Tiesong Lin
    Abstract:

    Abstract This study focused on joining high volume fraction SiC particles reinforced aluminum matrix composites (55 vol% SiCp/Al) with 50SnO–20ZnO–30P2O5 (SZP) glass directly in air. Prior to joining, various properties of the SZP glass and its wettability on the composites were investigated. The results showed that the coefficient of thermal expansion of the glass was 10.58 × 10-6/°C (20–369 °C), which closely match with 55 vol% SiCp/Al composites. The glass transition, crystallization, and softening temperature were identified to be 369, 397, and 486 °C, respectively. Subsequent wetting tests confirmed excellent wettability of the glass on the composites. The joint exhibited sound bonding that was free of defects when brazed at 550 °C for 10 min Zn2P2O7 was formed adjacent to the composites due to the crystallization of the glass. The mechanical properties of the joint were proven to be suitable, exhibiting an average shear strength of 55.3 MPa.