کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474133 991076 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Increased surface area during sintering of calcium phosphate glass and sodium chloride mixtures
ترجمه فارسی عنوان
افزایش سطح در هنگام پخت شیشه های کلسیم فسفات و مخلوط کلرید سدیم
کلمات کلیدی
داربست شیشه ای جوش زدن شیشه، ریز ساختار، سطح خاص، دیلاتومتری
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

Glass scaffolds were obtained by the salt sintering method, using mixtures of calcium phosphate glass, 25.42%SiO2–10.89%P2O5–32.68%CaO–31%MgO(mol%), and salt, NaCl, pressed and sintered bellow the salt melting point, followed by leaching of the salt in water.The sintering behaviour of glass/salt powder mixtures was followed by dilatometry, BET and SEM. It was found that the specific surface area (SSA) of supports sintered between 700–750 °C and leached, can be 15–50 times higher than that of the glass precursor powder, a very surprising behaviour because it presents the opposite tendency of a typical sintering process.Dilatometric curves showed an unusual expansion from ∼450 °C until ∼700 °C, followed by shrinkage at higher temperatures. This expansion accompanies the observed increase of SSA and the microstructures showed a clear effect of reaction between the glass and the salt with remarkable wrinkling of the glass particle surfaces. This phenomenon was further investigated by using DTA, XRD and FTIR.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 35, Issue 1, January 2015, Pages 329–336
نویسندگان
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