نتایج جستجو برای: combustion synthesis
تعداد نتایج: 438403 فیلتر نتایج به سال:
this study investigated the impact of explicit instruction of morphemic analysis and synthesis on the vocabulary development of the students. the participants were 90 junior high school students divided into two experimental groups and one control group. morphological awareness techniques (analysis/synthesis) and conventional techniques were used to teach vocabulary in the experimental groups a...
در این پژوهش پودرtib2-tic نانوکریستالی از راه روش جدیدی با عنوان سنتز احتراقی ماکروویو یا همان macs (microwave-assisted combustion synthesis) تولید شد. ابتدا مخلوط پودری 3ti + b4c به کمک آسیاب سیارهای تا 9 ساعت آسیاب شد. از پودرهای آسیاب شده جهت انجام واکنشmacs قرصهایی با قطر mm10 تهیه و از یک دستگاه ماکروویو خانگی با توانw1100 جهت سنتز استفاده شد. نتایج ناشی از آنالیزهای xrd و sem نشان داد ...
In this study, B4C / SiC nanocomposite powder with 1 to 1 molar ratio was synthesized completely in situ, with high purity and at low temperature by mechanical activation volume combustion synthesis method. At first, raw materials consist of B2O3, Mg, C and Si were weighed. The weighed materials were mixed and milled for 9 hours by planetary ball mil and under argon atmosphere. Milled materials...
An experimental investigation of the combustion behavior of nano-aluminum (n-Al) and nano-aluminum oxide (n-Al2O3) particles stably suspended in biofuel (ethanol) as a secondary energy carrier was conducted. The heat of combustion (HoC) was studied using a modified static bomb calorimeter system. Combustion element composition and surface morphology were evaluated using a SEM/EDS system. N-Al a...
homogenous charge compression ignition (hcci) combustion is spontaneous multi-site combustion of a nominally premixed air/fuel mixture that exhibits high rate of pressure rise and short combustion duration. to avoid excessive pressure rise rate and knocking, hcci engines are fueled with highly diluted mixture using a combination of excess air and/or egr. hcci combustion is attractive due to ext...
This paper presents results obtained from corncob combustion in a pilot scale vortexing fluidized bed combustor (VFBC). Three combustion modes including direct combustion, staged combustion and flue gas recirculation (FGR) combustion were employed, and their combustion and pollutant emission characteristics were studied. In addition, the effects of combustion fraction and bed temperature on pol...
Barium zirconate is an interesting material for refractory applications as well as a good substrate for the manufacturing of high temperature superconductors. However, its solid state synthesis requires high temperature and provides inhomogeneous powder with a broad particle size distribution. In order to avoid these disadvantages, soft solution routes are of growing importance in the ceramic p...
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