OPTIMIZATION OF SYNTHESIS CONDITIONS OF ALUMINUM HYDROXIDE IN SINTER METHOD

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Sharifi Pardis; Teymuri Fatemeh; Khezri Seyyed Hadi

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Seminar Paper

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Seminar: IRANIAN INORGANIC CHEMISTRY CONFERENCE
Year:2014 | Issue:16

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Title

OPTIMIZATION OF SYNTHESIS CONDITIONS OF ALUMINUM HYDROXIDE IN SINTER METHOD

Author(s)

Sharifi Pardis | Teymuri Fatemeh | Khezri Seyyed Hadi | Issue Writer Certificate

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Abstract

PHASE SINTER MOLTEN ALUMINUM POWDER METALLURGY PROCESS IS UNAVOIDABLE WAY. THE ADVANTAGE OF THIS METHOD IS THE RAPID CONDENSATION, HOMOGENEITY, HIGH FINAL DENSITY AND FINE STRUCTURES THAT ARE OFTEN SUPERIOR PHYSICAL AND MECHANICAL PROPERTIES OF MATERIALS IN THE SOLID STATE CAUSES SINTER. BOEHMIT IS AN ALUMINIUM OXIDE HYDROXIDE (G-ALO(OH)) MINERAL, A COMPONENT OF THE ALUMINIUM ORE BAUXITE. IT IS DIMORPHOUS WITH DIASPORE. IT CRYSTALLIZES IN THE ORTHORHOMBIC DIPYRAMIDAL SYSTEM AND IS TYPICALLY MASSIVE IN HABIT. IT IS WHITE WITH TINTS OF YELLOW, GREEN, BROWN OR RED DUE TO IMPURITIES. BOEHMITE, WHITE AND RELATIVELY SOFT BASIC ALUMINUM OXIDE [ALO(OH)] THAT IS A COMMON MINERAL IN BAUXITE, IN WHICH IT FORMS DISSEMINATED GRAINS OR PEALIKE MASSES. BOEHMITE IS DIMORPHOUS (IDENTICAL IN COMPOSITION BUT DIFFERING IN CRYSTAL STRUCTURE) WITH DIASPORE; ITS CRYSTALS HAVE ORTHORHOMBIC SYMMETRY.BOEHMITE CRYSTALS OF 5–10 MM SIZE ARE PRODUCED BY THIS METHOD. FIBROUS (ACICULAR) BOEHMITE IS OBTAINED UNDER ACIDIC HYDROTHERMAL CONDITIONS. EXCESS WATER, ABOUT 1% TO 2% HIGHER THAN THE STOICHIOMETRIC 15%, IS USUALLY FOUND IN HYDROTHERMALLY PRODUCED BOEHMITE. THE STRUCTURE OF BOEHMITE CONSISTS OF DOUBLE LAYERS IN WHICH THE OXYGEN IONS EXHIBIT CUBIC PACKING. HYDROXYL IONS OF ONE DOUBLE LAYER ARE LOCATED OVER THE DEPRESSION BETWEEN OH IONS IN THE ADJACENT LAYER SUCH THAT THE DOUBLE LAYERS ARE LINKED BY HYDROGEN BONDS BETWEEN HYDROXYLS IN NEIGHBORING PLANES. THERE IS SOME TECHNICAL PRODUCTION AND USE OF SYNTHETICALLY PRODUCED BOEHMITE [1-3].IN THIS STUDY SYNTHESIS CONDITIONS OF ALUMINUM HYDROXIDE IN SINTER METHOD SUCH AS TEMPERATURE AND PH AND OTHER FACTORS WERE OPTIMIZED.

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APA: Copy

Sharifi, Pardis, Teymuri, Fatemeh, & Khezri, Seyyed Hadi. (2014). OPTIMIZATION OF SYNTHESIS CONDITIONS OF ALUMINUM HYDROXIDE IN SINTER METHOD. IRANIAN INORGANIC CHEMISTRY CONFERENCE. SID. https://sid.ir/paper/914067/en

Vancouver: Copy

Sharifi Pardis, Teymuri Fatemeh, Khezri Seyyed Hadi. OPTIMIZATION OF SYNTHESIS CONDITIONS OF ALUMINUM HYDROXIDE IN SINTER METHOD. 2014. Available from: https://sid.ir/paper/914067/en

IEEE: Copy

Pardis Sharifi, Fatemeh Teymuri, and Seyyed Hadi Khezri, “OPTIMIZATION OF SYNTHESIS CONDITIONS OF ALUMINUM HYDROXIDE IN SINTER METHOD,” presented at the IRANIAN INORGANIC CHEMISTRY CONFERENCE. 2014, [Online]. Available: https://sid.ir/paper/914067/en

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