(1. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110004；2. 沈陽理工大學(xué) 材料科學(xué)與工程學(xué)院，沈陽 110168)
摘 要: 以油頁巖渣為主要原料制備微晶玻璃，利用DTA、XRD、SEM及FT-IR等技術(shù)對微晶玻璃的晶化過程和微觀結(jié)構(gòu)進(jìn)行研究。結(jié)果表明：在一定的熱處理?xiàng)l件下可以以基礎(chǔ)玻璃制備出主晶相為鈣鐵透輝石，次晶相為鈣長石的纖維狀結(jié)構(gòu)的微晶玻璃；最佳的熱處理工藝為：850 ℃核化100 min，980 ℃晶化80 min；隨著熱處理溫度的升高，紅外吸收帶發(fā)生明顯的分裂；玻璃結(jié)構(gòu)中的[AlO4]向[AlO6]轉(zhuǎn)化；網(wǎng)絡(luò)結(jié)構(gòu)中的鈦離子逐漸轉(zhuǎn)變?yōu)榱湮唬纬晌⒕?SPAN style="LETTER-SPACING: -1pt">—— 鈦酸鎂和鈦鐵晶石，為晶體的生長提供非均勻形核位置。
關(guān)鍵字: 油頁巖渣；微晶玻璃；鈣鐵透輝石；晶化過程
（1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;2. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110168, China）
Abstract:The glass-ceramics was prepared with oil shale residue as primary material. The crystallization process and microstructure of the glass-ceramics were investigated by DTA, XRD, SEM and FT-IR. The results show that the glass-ceramics with fibroid structure is produced after definite heat treatment, the main crystallization phase is hedenbergite and anorthite is the minor crystallization phase. The optimal process of heat treatment shows as follows: the nucleation temperature is 850 ℃ and hold time is 100 min, and the crystallization temperature is 980 ℃ and hold time is 80 min. With increasing heat treatment temperature, the FT-IR absorption bands appear obvious split, the aluminum-oxide polyhedron in the glass network changes from [AlO4] to [AlO6]. The titanium ion in the glass network gradually transforms to the 6-coordinated, moreover forms minicrystal of MgTi2O5 and Fe2TiO4 which provides the position of heterogeneous nucleation for the growth of crystal.
Key words: oil shale residue; glass-ceramics; hedenbergite; crystallization process
