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Auteur عاشور سليمان |
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Titre : تحضير و دراسة الميليت إنطلاقا من الكاولان المحلية Type de document : texte imprimé Auteurs : حرايز مناد ; جامعة منتوري, Éditeur scientifique ; عاشور سليمان, Directeur de thèse Année de publication : 1996 Importance : 111 ورقة Note générale : 1 نسخة موجودة في قاعة المطالعة 2 نسخ موجودة في مخزن المكتبة المركزية Langues : Arabe (ara) Catégories : Arabe
الفيزياءTags : الكاولان الميليت Index. décimale : 530 الفيزياء Permalink : index.php?lvl=notice_display&id=8541 تحضير و دراسة الميليت إنطلاقا من الكاولان المحلية [texte imprimé] / حرايز مناد ; جامعة منتوري, Éditeur scientifique ; عاشور سليمان, Directeur de thèse . - 1996 . - 111 ورقة.
1 نسخة موجودة في قاعة المطالعة 2 نسخ موجودة في مخزن المكتبة المركزية
Langues : Arabe (ara)
Catégories : Arabe
الفيزياءTags : الكاولان الميليت Index. décimale : 530 الفيزياء Permalink : index.php?lvl=notice_display&id=8541 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité منا/889 منا/889 Thèse Bibliothèque principale Thèses Disponible
Titre : تحضير ودراسة اسمنت فوسفومغنيزي على أساس الدولوميت والفوسفـات. Type de document : texte imprimé Auteurs : مريم بغريش, Auteur ; عاشور سليمان, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 72 ورقة. Format : 30 سم. Note générale : 1نسخ موجودة مكتبة المركزية
Langues : Arabe (ara) Catégories : Arabe
الفيزياءTags : الإسمنت الفوسفومؽنٌزي الستروفٌت الدولومٌت ؼبار قمائن الإسمنت الكلسنة الجزئٌة
cement phosphomagnisium struvite dolomite cement kiln dust partial
calcination la poussière de four à ciment calcination partielleIndex. décimale : 530 الفيزياء Résumé :
In this work, it is the possibility of the preparation of cement phosphomagnisium, which quickly hardened at room temperature, starting from a local raw material available and no expensive which is dolomite. Dolomite was calcined partially, to obtain a mixture of magnesium oxide and calcium carbonates (MgO, CaCO3).This mixture was then used to form a phosphomagnesity bond after addition of different compounds such as: MgCl2, MgSO4, NH6PO4, H3PO4, Na2B4O7.10H2O and H2O with different percentage (preparation of three solutions). The first stage percentages are processed during preparation of the two solutions. When we studied the third solution we added cement kiln dust to improve the properties of the phosphomagnesium cement samples. Different techniques were used to investigate the physical properties of this cement are: DRX, FTIR, RAMMAN, MEB, DSC, tensile strength and bond strength. The results obtained show that this cement hardened in 15 to 20 min, the value of tensile strength and bond strength is at 2.95 MPa and 3.4 MPa respectively, comparable or even better than that found in the literature. The addition of 20 % weight of cement kiln dust improved the mechanical properties of this cement. The study of the structure of this cement shows the formation of a phase called Struvite in the case of cement prepared from the first and third solution, and the phase struvite with Mg(PO2)4S410H2O for cement prepared with the method using the second solution. The decomposition of this cement starts at 70 °C. The results of this work can show that it can be used well as cement phosphomagnisium at lower cost in the place of existing cement on the market.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/ABEG4547.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11812 تحضير ودراسة اسمنت فوسفومغنيزي على أساس الدولوميت والفوسفـات. [texte imprimé] / مريم بغريش, Auteur ; عاشور سليمان, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2021 . - 72 ورقة. ; 30 سم.
1نسخ موجودة مكتبة المركزية
Langues : Arabe (ara)
Catégories : Arabe
الفيزياءTags : الإسمنت الفوسفومؽنٌزي الستروفٌت الدولومٌت ؼبار قمائن الإسمنت الكلسنة الجزئٌة
cement phosphomagnisium struvite dolomite cement kiln dust partial
calcination la poussière de four à ciment calcination partielleIndex. décimale : 530 الفيزياء Résumé :
In this work, it is the possibility of the preparation of cement phosphomagnisium, which quickly hardened at room temperature, starting from a local raw material available and no expensive which is dolomite. Dolomite was calcined partially, to obtain a mixture of magnesium oxide and calcium carbonates (MgO, CaCO3).This mixture was then used to form a phosphomagnesity bond after addition of different compounds such as: MgCl2, MgSO4, NH6PO4, H3PO4, Na2B4O7.10H2O and H2O with different percentage (preparation of three solutions). The first stage percentages are processed during preparation of the two solutions. When we studied the third solution we added cement kiln dust to improve the properties of the phosphomagnesium cement samples. Different techniques were used to investigate the physical properties of this cement are: DRX, FTIR, RAMMAN, MEB, DSC, tensile strength and bond strength. The results obtained show that this cement hardened in 15 to 20 min, the value of tensile strength and bond strength is at 2.95 MPa and 3.4 MPa respectively, comparable or even better than that found in the literature. The addition of 20 % weight of cement kiln dust improved the mechanical properties of this cement. The study of the structure of this cement shows the formation of a phase called Struvite in the case of cement prepared from the first and third solution, and the phase struvite with Mg(PO2)4S410H2O for cement prepared with the method using the second solution. The decomposition of this cement starts at 70 °C. The results of this work can show that it can be used well as cement phosphomagnisium at lower cost in the place of existing cement on the market.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/ABEG4547.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11812 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité بغر/4547 بغر/4547 Thèse Bibliothèque principale Thèses Disponible
Titre : دراسة البنى النانومترية لأكسيد التيتانيوم : تطبيق الكهروكيميائية الضوئية Type de document : texte imprimé Auteurs : نجاح صبتي, Auteur ; عاشور سليمان, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 133 ورقة. Format : 30 سم. Langues : Arabe (ara) Catégories : Arabe
الفيزياءTags : nanostructures nanofils nanotubes Nanofeuilles nanofibres anodisation hydrothermique immersion TiO2 Fe2O3-TiO2 Fe-BaTiO3 CaTiO3-TiO2 photoélectro-chimique ."
nanowires Nanoleafs anodization, hydrothermal, immersion, photoelectrochemical
البنى النانومترية الأسلاك الأنابيب الأوراق الألياف الأكسدة المصعدية المعالجة
الحرارية المائية الغمر الكهروكيميائية الضوئيةIndex. décimale : 530 الفيزياء Résumé : In this work, the preparation of different TiO2 nanostructures and their functionalization by simple methods such as anodization and hydrothermal was undertaken.
Different techniques of analysis have been used to characterize the preparedlayers of TiO2 nanostructures on Ti substrate and related compounds. These are X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, UV-Visible spectroscopyandX-ray Photoelectron Spectroscopy (XPS).
Anatase and rutile TiO2 in various nanostructured forms were obtained (Nanotubes, nanofibers, nanoleafs and nanowires) and analyzed. Some of these nanostructures, particularly TiO2 nanotubes and nanofibers were successfully decorated with iron oxide (Fe2O3) phase, barium titanate (BaTiO3), and calcium titante(CaTiO3) nanoparticles using various methods (hydrothermal, impregnation, and rapid flame heating).The morphology of these nanostructures considerably changed with the hydrothermal processing temperature and time. The obtained nanostructures were heat treated at different treatments both under air and vacuum in order to change their content in oxygen vacancies. Photoelectrochemical testsof the obtained various nanostructures of TiO2heat treated at 450 °C under air and 300 °C under vacuum demonstrate that TiO2 nanoleafs and nanowires have the largest photoelectrochemical currentfor samples that are treated under air. Heat treatment under vacuum was successful only in the case of TiO2 nanofibers.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/ASOB4046.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9991 دراسة البنى النانومترية لأكسيد التيتانيوم : تطبيق الكهروكيميائية الضوئية [texte imprimé] / نجاح صبتي, Auteur ; عاشور سليمان, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 133 ورقة. ; 30 سم.
Langues : Arabe (ara)
Catégories : Arabe
الفيزياءTags : nanostructures nanofils nanotubes Nanofeuilles nanofibres anodisation hydrothermique immersion TiO2 Fe2O3-TiO2 Fe-BaTiO3 CaTiO3-TiO2 photoélectro-chimique ."
nanowires Nanoleafs anodization, hydrothermal, immersion, photoelectrochemical
البنى النانومترية الأسلاك الأنابيب الأوراق الألياف الأكسدة المصعدية المعالجة
الحرارية المائية الغمر الكهروكيميائية الضوئيةIndex. décimale : 530 الفيزياء Résumé : In this work, the preparation of different TiO2 nanostructures and their functionalization by simple methods such as anodization and hydrothermal was undertaken.
Different techniques of analysis have been used to characterize the preparedlayers of TiO2 nanostructures on Ti substrate and related compounds. These are X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, UV-Visible spectroscopyandX-ray Photoelectron Spectroscopy (XPS).
Anatase and rutile TiO2 in various nanostructured forms were obtained (Nanotubes, nanofibers, nanoleafs and nanowires) and analyzed. Some of these nanostructures, particularly TiO2 nanotubes and nanofibers were successfully decorated with iron oxide (Fe2O3) phase, barium titanate (BaTiO3), and calcium titante(CaTiO3) nanoparticles using various methods (hydrothermal, impregnation, and rapid flame heating).The morphology of these nanostructures considerably changed with the hydrothermal processing temperature and time. The obtained nanostructures were heat treated at different treatments both under air and vacuum in order to change their content in oxygen vacancies. Photoelectrochemical testsof the obtained various nanostructures of TiO2heat treated at 450 °C under air and 300 °C under vacuum demonstrate that TiO2 nanoleafs and nanowires have the largest photoelectrochemical currentfor samples that are treated under air. Heat treatment under vacuum was successful only in the case of TiO2 nanofibers.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/ASOB4046.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9991 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité صبت/4046 صبت/4046 Thèse Bibliothèque principale Thèses Disponible
