کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1461917 | 989625 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The effects of temperature, holding time and salt amount on formation of nano CaZrO3 via molten salt method The effects of temperature, holding time and salt amount on formation of nano CaZrO3 via molten salt method](/preview/png/1461917.png)
Nano-particles of CaZrO3 were successfully synthesized at 800 °C using the molten-salt method, and the effects of processing parameters, such as temperature, holding time and amount of salt on the crystallization of CaZrO3 were investigated. Na2CO3, CaCl2 and nano-ZrO2 were used as starting materials. On heating, Na2CO3 reacted with CaCl2 to form NaCl and in situ CaCO3. Na2CO3–NaCl molten eutectic salt provided a liquid medium for reaction of CaCO3 and ZrO2 to form CaZrO3. The results demonstrated that CaZrO3 started to form at about 700 °C and that, after the temperature was increased to 1000 °C, the amounts of CaZrO3 in the resultant powders increased with a concomitant decrease in CaCO3 and ZrO2 contents. After washing with hot-distilled water, the samples heated for 3 h at 800 °C were single-phase CaZrO3 with 70–90 nm particle size. Furthermore, the synthesized CaZrO3 particles retained the size and morphology of the ZrO2 powders, which indicated that a template formation mechanism dominated the formation of CaZrO3 by molten-salt synthesis.
Journal: Ceramics International - Volume 38, Issue 7, September 2012, Pages 5363–5368