IJE TRANSACTIONS A: Basics Vol. 31, No. 1 (January 2018) 25-31   

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Mst. Sharmin Mostari, T. Zaman, A. Sen and Md. Rahat Al Hassan
( Received: August 09, 2017 – Accepted in Revised Form: October 12, 2017 )

Abstract    For a developing country like Bangladesh, waste management is an important issue. Since it is a small over-populated country , strict government regulations regarding landfills is essential. Expansion of ceramic industries is considered to be one of the potential sectors for the economic growth of Bangladesh. However, raw material cost per unit production is the prime concern for industrialists. Utilization of rice husk (RH) for industrial purposes is found to be an effective solution associated with both waste disposal and financial concerns. Since, RH is a rich source of silica, it could substitute quartz used in ceramic industries. Availability of RH in Bangladesh makes it more suitable for manufacturing applications. Hence, in the present work we focused on the synthesis and characterization of porcelain body by incorporating 25% rice husk ash (RHA) as a substitute of quartz and evaluation of structure-property relationship by means of temperature. Three different calcination temperatures (700, 800 and 900oC) were chosen for the conversion of rice husk (RH) to rice husk ash (RHA). True density measurement and phase identification of RHA was conducted to ensure the quality of raw material. Calcination at 900oC for 3 hours provided the preferred quality of RHA. Green samples for the porcelain body were prepared by a homogenous mixture of clay, feldspar, quartz and RHA, followed by densification at 950, 1050 and 1150oC for constant soaking time of 1 hour. The effect of calcination as well as sintering profile on the densification of porcelain body was assessed. Finally physical, mechanical and morphological characterizations were done. The investigation revealed that 1050oC as the optimum sintering temperature for 25% quartz substituted product.


Keywords    Porcelain Body, Rice Husk, SEM, Sintering, XRD


چکیده    برای یک کشور در حال توسعه مانند بنگلادش، مدیریت زباله یک مسئله­ی مهم است. از آن­جا که این کشور دارای جمعیت بیش از حد است، رعایت مقررات دقیق دولت در مورد دفن زباله امری ضروری است. گسترش صنایع سرامیک به عنوان یکی از بخش­های بالقوه رشد اقتصادی بنگلادش محسوب می­شود. با این حال، هزینه­ی مواد خام به ازای تولید واحد محصول نگرانی اصلی صنعت­گران است. استفاده از پوسته­ی برنج (RH) برای اهداف صنعتی، یک راه حل موثر در ارتباط با دفع زباله و نگرانی­های مالی است. از آن­جا که RH منبع غنی سیلیسیم است، می­توان از آن برای جایگزینی کوارتز مورد نیاز صنایع سرامیک استفاده کرد. در دسترس بودن RH در بنگلادش آن را برای تولید قطعات سرامیکی مناسب می­کند. از این رو، در این مقاله، با ترکیب 25 درصد خاکستر پوسته­ی برنج (RHA) به عنوان یک جایگزین کوارتز و ارزیابی رابطه­ی بین ساختار و خواص آن با تغییر دما برای تولید بدنه­ی چینی تحقیق کردیم. برای تبدیل پوسته­ی برنج (RH) به خاکستر پوسته­ی برنج (RHA)، سه دمای کالسینه کردن (700، 800 و 900 درجه­ی سانتیگراد) انتخاب شدند. اندازه­گیری چگالی واقعی و تعیین فاز RHA برای اطمینان از کیفیت مواد خام انجام شد. کالسینه کردن در دمای 900 سانتی­گراد به مدت 3 ساعت کیفیت مطلوب RHA را به دست می­دهد. نمونه­های خام برای بدن چینی توسط مخلوط همگن از خاک رس، فلدسپات، کوارتز و RHA تهیه شده و پس از آن با نگاه داشتن در 950، 1050 و 1150 درجه­ی سانتیگراد برای مدت زمان 1 ساعت، تهیه شد. تاثير کلسينه کردن و پروفيل پخت و بر چگالی بدنه­ی چيني ارزيابي شد. در نهایت، مشخصات فیزیکی، مکانیکی و مورفولوژیکی انجام شد. این تحقیق نشان داد که دمای 1050 سانتی­گراد دمای مطلوب برای شرایط جایگزینی 25 درصد کوارتز است.


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