鎳渣制備微晶玻璃的結晶動力學及結晶化過程

馬明生; 倪文; 王亞利

doi:10.13374/j.issn1001-053x.2007.02.040

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鎳渣制備微晶玻璃的結晶動力學及結晶化過程

doi: 10.13374/j.issn1001-053x.2007.02.040

北京科技大學土木與環境工程學院, 北京 100083

詳細信息

作者簡介:
馬明生(1980-),男,博士研究生;倪文(1962-),男,教授,博士生導師

中圖分類號: TQ171
計量
- 文章訪問數: 149
- HTML全文瀏覽量: 32
- PDF下載量: 12
- 被引次數: 0
出版歷程
- 收稿日期: 2006-09-08
- 修回日期: 2006-11-08
- 網絡出版日期: 2021-08-16

Crystallization kinetics and process of the glass-ceramic produced by nickel slag

Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 探討以鎳渣為主要原料采用熔融法制備建筑用微晶玻璃.研究引入Cr₂O₃作為晶核劑的鎳渣微晶玻璃的成核及晶化過程.利用DSC測試來確定基礎玻璃的晶化溫度,并利用修正的Johnson-Mehl-Avrami(J/VIA)方法初步計算以鎳渣為主要原料所制備的基礎玻璃在加入質量分數2%的Cr₂O₃作為晶核劑后的結晶活化能E及結晶動力學參數k(T_p),計算結果分別為E=371.1kJ·mol^-1,結晶動力學參數k(T_p)=0.29.采用XRD、SEM和光學顯微鏡測試、分析及觀察方法來鑒定、分析微晶玻璃試樣的主晶相及微觀結構.結果顯示,加入晶核劑的基礎玻璃從930℃開始均勻地析出透輝石相晶體;隨著溫度的升高,晶體尺寸也逐漸增大,在溫度達到950℃后,對樣品進行30min保溫熱處理,樣品中晶體尺寸達到10~15μm.
- 鎳渣 /
- 微晶玻璃 /
- 結晶化 /
- 動力學參數
Abstract: The glass-ceramic was produced by nickel slag as primary raw material. The crystallization process of the glass-ceramic was analyzed and the crystallization temperature was determined by DSC. The activation E and crystallization kinetic parameter k (T_p) of the glass added 2% Cr₂O₃ by weight as nucleation agent were calculated by the modified Johnson-Mehl-Avrami (JMA) method, and the results were 371. 1 kJ· mol^-1 and 0.29, respectively. The characters of crystals appearing in glass were analyzed by XRD, SEM and optical microscope observation methods. It is shown that the crystallization process is observed between 930℃ and 950℃, and the size of crystals is 10~15μm after heat treatment at 950℃ for 30 min.
- nickel slag /
- glass-ceramic /
- crystallization process /
- kinetic parameter