利用鉭鈮尾礦制備CaO-Al2O3-SiO2系統微晶玻璃

CaO-Al2O3-SiO2 System Glass-ceramics Prepared from Nb-Ta Tailings

程金樹(Jin-Shu Cheng) ； 何峰(Feng He) ； 謝俊(Jun Xie)

《工程科技與教育學刊》 7卷2期 (2010/04) Pp. 250-257

https://doi.org/10.6451/JETE.201004.0250

摘要

以鉭鈮尾礦爲主要原料，利用燒結法制備出了微晶玻璃材料。引用CaO，ZnO和BaO對玻璃的成分進行調節。利用XRD、SEM等對微晶玻璃的結構進行了研究。研究結果表明：在所制備的微晶玻璃材料中，析出了β-矽灰石晶體。而CaO含量的增加會促進β-矽灰石晶體的析出。玻璃顆粒的燒結是在液相的參與下完成的。晶化溫度的提高有利於β-矽灰石晶體的析出。利用“二步法”工藝制備的微晶玻璃的密度與質量優於利用“一步法”工藝制備的微晶玻璃。

關鍵字

微晶玻璃 ； 鉭鈮尾礦 ； 燒成工藝

並列摘要

Particle sintering technology was used to transform Niobium Tantalum Tailings (Nb-Ta tailings) into glass ceramic products. CaO, ZnO and BaO were used to adjust the composition of the glass. β-wollastonite was found present as the major crystalline phase in all treated samples. With the CaO increasing, the intensity of crystal diffractive peaks is also increasing. The formation of β-wollastonite crystal can be accelerated by the increasing of CaO. The sintering is processed under the participation of liquid phase, and increase of sintering temperature does a great favor on descending the liquid phase viscosity of glass particles, which consequently is available for sintering. The density and sintering quality of the samples prepared by two-step sintering are higher than that of one-step sintering. With the sintering temperature increasing, the surface of the samples become better and have beautiful luster.

並列關鍵字

Glass-ceramic ； Niobium Tantalum Tailings ； Sintering technology