بررسی اثر پوشش‌دهی آمونیوم پرکلرات بر خواص سوخت جامد مرکب(علمی-ترویجی)
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Abstract:
Abstract: Oxidizer constitute most part of propellant and ammonium perchlorate is most used oxidizer in solid propellant among other oxidizer. Coating is one method to prevent agglomeration of ammonium perchlorate or to create other desirable properties on ammonium perchlorate. Usually type of coating agent and method of coating are selected on base of purpose of coating. Target of coating perhaps is prevent of agglomeration or improvement thermal decomposition of ammonium perchlorate or improvement of propellant properties. These coating involve different group of chemical compounds consist of organosilicon compoundes, aziridine compounds, some complexes, and different polymers and even aluminum. In often of cases after coating coated ammonium perchloratehas been used to prepare propellant composition and has been investigate some properties of propellant such as mechanical properties, ballistic properties, visco-elastic behavior, burning rate, pressure index sensitivity, and viscosity. Usually organosilicon compounds and some of polymers improve mechanical properties and reduce sensitivity and burning rate, whereas aluminum increase viscosity, burning rate and friction sensitivity. Aften aziridine compounds and neutral solvent use to prevent of particles growth and product ultrafine ammonium perchlorate.
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مروری بر روشهای سنتز و کنترل کیفی کرومیت مس به عنوان کاتالیزور تجزیه حرارتی آمونیوم پرکلرات در سوخت جامد کامپوزیت
How to thermal decomposition of ammonium perchlorate and the energy realeased from it’s decomposition is effective on the burning rate of propellant.Therefore, various catalysts can be used to improve the combustion properties of ammounium perchlorate .Crystalline transition metal oxides (TMOs) with diverse morphological structure have attracted tremendous attention during the last decade. Amon...
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Composite solid propellants are the major source of chemical energy in space vehicles and missiles. Composite propellants are composed of crystalline oxidizer particles dispersed in polymeric fuel binder. Ammonium perchlorate (AP) is used as the most common oxidizer and hydroxyl terminated polybutadiene (HTPB) as the fuel binder. The ballistics of a composite propellant can be improved by addin...
full textمروری بر کاربرد نانو کاتالیست‌های اکسید فلزی برای تجزیه حرارتی آمونیوم پرکلرات (علمی-ترویجی)
In this review, an attempt to collect summarized literature data on catalytic effect of nanosized metal oxides on the thermal decomposition of ammonium perchlorates is made. Several experimental results show nanometal oxides are more effective catalysts as compared to nanosized metals. Nanocatalysts decrease the activation energy and the increase the rate the thermal decomposition of ammonium p...
full textاثر میکروکپسول سازی بر خواص حرارتی آمونیوم پرکلرات
با وجود مزیت های آمونیوم پرکلرات (ap) به عنوان یک اکسیدکننده حالت جامد، شامل محتوای بالای اکسیژن و اینکه در تجزیه هیچ پسماندی به جای نمی گذارد، فرآیند تجزیه گرمایی متوالی آن در یک رنج دمای وسیع هنوز هم مشکل ساز می باشد. هدف این تحقیق بررسی شرایط بهینه برای اصلاح ویژگی های تجزیه گرمایی ذرات آمونیوم پرکلرات توسط تکنیک های میکروکپسول سازی می باشد. از روش حلال-غیرحلال جهت میکروکپسول سازی ذرات آمونی...
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Journal title
volume 9 issue 4
pages 49- 61
publication date 2014-01
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