نتایج جستجو برای: glass

تعداد نتایج: 72128  

Journal: :Journal of Industrial & Engineering Chemistry 1921

M. H. Hamzeh Sayed Mojtaba Sadrameli,

ABSTRACT:A mathematical model for the performance prediction of an industrial glass furnace with six ports on each side was developed. This model comprises of two main sub-models for the combustion chamber and glass-melting tank. The first sub-model consists of the models for the combustion and the heat transfer model including, radiation, convection and conduction. The fuel combustion in a...

Different glasses suitable for temperature sensing in the fiber optic sensors were studied in this article. The phase changes for eight different glass materials were calculated and results were compared. Our results showed that extra dense flint glass is the most sensitive one, while pure silica results in the lowest phase change. In another study the effect of wavelength on the phase variatio...

Journal: :Europhysics News 2006

Journal: :Journal of the Illuminating Engineering Institute of Japan 1985

EFTEKHARI-YEKTA B., , MARGHUSSIAN V.K., ,

The effect of precipitation of ?.qss. and gahnite phases during heat treatment of glass frits in the ZnO-Al2O3-SiO2 system on the mechanical property of resulting glass-ceramic specimens were investigated. It was shown that gahnite glass-ceramics had higher bend strength and toughness values than ?.qss. ones. The results are attributed to the higher modulus of elasticity as well as higher therm...

Journal: :dental research journal 0
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background: scuba diving is one of the fastest growing sports in the world. the objective of this study was to evaluate the effect of pressure variations to which divers are exposed on the pull out strength of glass fiber post luted with different cements. materials and methods: in this in vitro study, 120 extracted, single-rooted lower premolars were endodontically treated. they were randomly ...

It is well known that the mechanical properties of fiberglass reinforced "phenolic moulding compounds" are significantly enhanced if the glass particles are coated with silane coupling agents before compounding. It has been shown that improvements obtained by using scanning electron microscopy techniques are due to better bonding of phenolic resin to the surface of treated glass fibers. These o...

In this research, MgF2-2%SiO2/MgF2 thin films were applied on a glass substrate. At first, MgF2 thin films with the optical thickness were deposited on the glass slide substrates. Then, MgF2-2%SiO2 thin films were deposited on the glass coated with MgF2 thin films. Finally, the nanocomposite thin films were surface treated by the PFTS solution. Characterization of the thin film was done by X-Ra...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی هوافضا 1390

چکیده در این تحقیق پارامترهای تاثیرگذار بر میزان تورق در فرایند سوراخکاری کامپوزیت های glass - epoxy بررسی شده است و سپس روشهایی برای کمینه کردن مقدار نیروی محوری و تورق در این مواد ارایه شده است. در این مسیر ابتدا پارامترهای دخیل در فرایند سوراخکاری کامپوزیت های glass - epoxy مورد مطالعه قرار گرفته شد. پس از مطالعات انجام شده، آن دسته از پارامترهایی که در فرایند سوراخکاری به طور مستقیم قابل ت...

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