Synthesis of magnesium borates by mechanically activated annealing

Duygu Aǧaoǧullari; Özge Balci; Hasan Gökçe; Ismail Duman; M. Lütfi Öveçoǧlu

doi:10.1007/s11661-012-1109-5

Synthesis of magnesium borates by mechanically activated annealing

Duygu Aǧaoǧullari^*
, Özge Balci
, Hasan Gökçe
, Ismail Duman
, M. Lütfi Öveçoǧlu

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Istanbul Technical University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

19 Atıf (Scopus)

Özet

Different magnesium borate compounds such as MgB ₄O ₇, Mg ₂B ₂O ₅, and Mg ₃B ₂O ₆ were synthesized from B ₂O ₃/MgO powder blends by mechanically activated annealing (M2A). Milling experiments were carried out in a SPEX 8000 D Mixer/Mill, and mechanically activated powders were subsequently annealed under air. The effects of B ₂O ₃/MgO mole ratios (1/1, 1/2, 1/3, and 2/1), milling durations (30 minutes and 1 and 2 hours), annealing durations (2 and 5 hours), and annealing temperatures (973 K, 1173 K, and 1273 K (700 °C, 900 °C, and 1000 °C)) on the formation and microstructure of magnesium borates were investigated. Compositional, microstructural, and thermal characterizations were conducted by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Temperature-product mole amount relations of the B ₂O ₃/MgO powder blends were interpreted by thermochemical software. MgB ₄O ₇ and Mg ₂B ₂O ₅ crystalline phases were identified in the M2A'd powders in the B ₂O ₃/MgO mole ratios of 1/1, 1/2, and 2/1. Mg ₂B ₂O ₅ and Mg ₃B ₂O ₆ crystalline phases were detected in the M2A'd B ₂O ₃/MgO: 1/3 powders in addition to unreacted MgO.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	2520-2533
Sayfa sayısı	14
Dergi	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Hacim	43
Basın numarası	7
DOI'lar	https://doi.org/10.1007/s11661-012-1109-5
Yayın durumu	Yayınlandı - Tem 2012

Finansman

The authors thank Aziz Genc¸ for his help during TEM characterizations. We also acknowledge the State Planning Organization (DPT) for funding the projects entitled ‘‘Advanced Technologies in Engineering’’ with the Project No. 2001K120750 and ‘‘Development of Al-Cu Based Metal Matrix Composites via Powder Metallurgy Techniques’’ with the Project No. 90189 out of which the main infrastructure of the Particulate Materials Laboratories was founded.

Finansörler	Finansör numarası
Al-Cu Based Metal Matrix Composites via Powder Metallurgy Techniques	90189
DPT	2001K120750
Devlet Planlama Örgütü

Belgeye Erişim

10.1007/s11661-012-1109-5

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Synthesis of magnesium borates by mechanically activated annealing",

abstract = "Different magnesium borate compounds such as MgB 4O 7, Mg 2B 2O 5, and Mg 3B 2O 6 were synthesized from B 2O 3/MgO powder blends by mechanically activated annealing (M2A). Milling experiments were carried out in a SPEX 8000 D Mixer/Mill, and mechanically activated powders were subsequently annealed under air. The effects of B 2O 3/MgO mole ratios (1/1, 1/2, 1/3, and 2/1), milling durations (30 minutes and 1 and 2 hours), annealing durations (2 and 5 hours), and annealing temperatures (973 K, 1173 K, and 1273 K (700 °C, 900 °C, and 1000 °C)) on the formation and microstructure of magnesium borates were investigated. Compositional, microstructural, and thermal characterizations were conducted by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Temperature-product mole amount relations of the B 2O 3/MgO powder blends were interpreted by thermochemical software. MgB 4O 7 and Mg 2B 2O 5 crystalline phases were identified in the M2A'd powders in the B 2O 3/MgO mole ratios of 1/1, 1/2, and 2/1. Mg 2B 2O 5 and Mg 3B 2O 6 crystalline phases were detected in the M2A'd B 2O 3/MgO: 1/3 powders in addition to unreacted MgO.",

author = "Duygu Aǧaoǧullari and {\"O}zge Balci and Hasan G{\"o}k{\c c}e and Ismail Duman and {\"O}ve{\c c}oǧlu, \{M. L{\"u}tfi\}",

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doi = "10.1007/s11661-012-1109-5",

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AU - Aǧaoǧullari, Duygu

AU - Balci, Özge

AU - Gökçe, Hasan

AU - Duman, Ismail

AU - Öveçoǧlu, M. Lütfi

PY - 2012/7

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N2 - Different magnesium borate compounds such as MgB 4O 7, Mg 2B 2O 5, and Mg 3B 2O 6 were synthesized from B 2O 3/MgO powder blends by mechanically activated annealing (M2A). Milling experiments were carried out in a SPEX 8000 D Mixer/Mill, and mechanically activated powders were subsequently annealed under air. The effects of B 2O 3/MgO mole ratios (1/1, 1/2, 1/3, and 2/1), milling durations (30 minutes and 1 and 2 hours), annealing durations (2 and 5 hours), and annealing temperatures (973 K, 1173 K, and 1273 K (700 °C, 900 °C, and 1000 °C)) on the formation and microstructure of magnesium borates were investigated. Compositional, microstructural, and thermal characterizations were conducted by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Temperature-product mole amount relations of the B 2O 3/MgO powder blends were interpreted by thermochemical software. MgB 4O 7 and Mg 2B 2O 5 crystalline phases were identified in the M2A'd powders in the B 2O 3/MgO mole ratios of 1/1, 1/2, and 2/1. Mg 2B 2O 5 and Mg 3B 2O 6 crystalline phases were detected in the M2A'd B 2O 3/MgO: 1/3 powders in addition to unreacted MgO.

AB - Different magnesium borate compounds such as MgB 4O 7, Mg 2B 2O 5, and Mg 3B 2O 6 were synthesized from B 2O 3/MgO powder blends by mechanically activated annealing (M2A). Milling experiments were carried out in a SPEX 8000 D Mixer/Mill, and mechanically activated powders were subsequently annealed under air. The effects of B 2O 3/MgO mole ratios (1/1, 1/2, 1/3, and 2/1), milling durations (30 minutes and 1 and 2 hours), annealing durations (2 and 5 hours), and annealing temperatures (973 K, 1173 K, and 1273 K (700 °C, 900 °C, and 1000 °C)) on the formation and microstructure of magnesium borates were investigated. Compositional, microstructural, and thermal characterizations were conducted by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Temperature-product mole amount relations of the B 2O 3/MgO powder blends were interpreted by thermochemical software. MgB 4O 7 and Mg 2B 2O 5 crystalline phases were identified in the M2A'd powders in the B 2O 3/MgO mole ratios of 1/1, 1/2, and 2/1. Mg 2B 2O 5 and Mg 3B 2O 6 crystalline phases were detected in the M2A'd B 2O 3/MgO: 1/3 powders in addition to unreacted MgO.

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Synthesis of magnesium borates by mechanically activated annealing

Özet

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