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Iranian Journal of Materials Science and Engineering، جلد ۱۱، شماره ۳، صفحات ۳۲-۳۸
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عنوان انگلیسی EFFECT OF ZrO2 PARTICLE SIZE ON MORPHOLOGY and SYNTHESIS OF NANO CaZrO3Via MOLTEN SALT METHOD
چکیده انگلیسی مقاله Well crystallized pure calcium zirconate (CaZrO3 ) nanopowder was successfully synthesized using the molten-salt method. CaCl2 , Na 2CO3, micro-ZrO 2and nano-ZrO 2 were used as starting materials. On heating, Na2CO3 reacted with CaCl 2to form NaCl and CaCO 3. Nano CaZrO 3 was formed by reacting equimolar amounts of in situformed CaCO 3 (or CaO) and ZrO 2 in molten Na 2CO3-NaCl eutectic mixture. CaZrO 3 particle size and synthesis temparture was tailored as a function of ZrO 2particle size. Due to the usage of nano-ZrO 2 , the molten salt synthesis (MSS) temperature was decreased and possible impurity phases in the final product were suppressed. The synthesis temperature was lowered to 800°C and soaking time of the optimal synthesis condition was reduced to 3h. After washing with hot-distilled water, the n-ZrO2sample heated at 800°C for 3h, was single phase CaZrO 3with 70-90 nm in particle size, while the m-ZrO 2sample heated at 1000°C for 3h, was single phase CaZrO 3 with 250-400 nm in particle size. Based on the TEM observation and thermodynamic analysis, the synthesized CaZrO 3 grains retained the morphology of the ZrO2 nanopowders, which indicated that a template formation mechanism play a dominant role in synthesis process
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نویسندگان مقاله r فضلی | r. fazli
centre of excellence for advanced materials and processing, school of metallurgy and materials engineering, iran university of science and technology, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علم و صنعت ایران (Iran university of science and technology)

f گلستانی فرد | f golestani fard
centre of excellence for advanced materials and processing, school of metallurgy and materials engineering, iran university of science and technology, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علم و صنعت ایران (Iran university of science and technology)

y صفایی نایینی | y safaei naeini
centre of excellence for advanced materials and processing, school of metallurgy and materials engineering, iran university of science and technology, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علم و صنعت ایران (Iran university of science and technology)

s زانگ | s. zhang
department of materials science and engineering, university of sheffield, sheffield s1 3jd, uk.
نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-3-189&slc_lang=en&sid=en
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Research paper
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