کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1614565 1516336 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Na2O and heat-treatment on crystallization of glass–ceramics from phosphorus slag
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effect of Na2O and heat-treatment on crystallization of glass–ceramics from phosphorus slag
چکیده انگلیسی

Na2O–CaO–Al2O3–SiO2–MgO glass was prepared from phosphorus slag as the raw materials and subsequently converted to glass–ceramics. The effects of both heat-treatment system and Na2O content on crystallization and microstructure were investigated by XRD and SEM. For the glass–ceramics with 15 mass% Na2O (A), Na2Ca2Si3O9 appears initially at 850 °C, then the dominant β-CaSiO3 from 850 °C to 1050 °C, which further transforms into α-CaSiO3 from 1050 °C to 1150 °C. The existing phases are α-CaSiO3 and Na2Ca2Si3O9 at above 1150 °C. For the glass–ceramics with 17 mass% Na2O (B), the primary and second phases are β-CaSiO3 and Na2Ca2Si3O9 in the range of 750 °C–950 °C, respectively. The transformation from β-CaSiO3 to Na2Ca2Si3O9 occurs from 950 °C to 1050 °C. Na2Ca2Si3O9 gradually transforms into Na2Ca2Si3O9 solid solution from 1050 °C to 1150 °C, and Na2Ca2Si3O9 solid solution becomes the predominant crystal phase above 1150 °C. Surface crystallization is dominant mechanism in glass–ceramics A, while volume crystallization mechanism is predominant in glass–ceramics B.


► We design new composition system for glass–ceramics from phosphorus slag.
► Phosphorous slag accounts for 62 mass% of the raw materials of glass–ceramics.
► Effects of heat-treatment system on microstructure were investigated.
► We found crystalline phase transformation process with heat-treatment temperatures.
► We determine the factors affecting the crystallization mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 557, 25 April 2013, Pages 190–195
نویسندگان
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