水热合成粉煤灰基铝掺杂托贝莫来石的微观结构

doi:10.11901/1005.3093.2017.197

材料研究学报

2018, Vol. 32

Issue (7): 513-517 DOI: 10.11901/1005.3093.2017.197

研究论文

本期目录 | 过刊浏览

水热合成粉煤灰基铝掺杂托贝莫来石的微观结构

郭晓潞^1,²(

), 孟凡杰²

1 同济大学先进土木工程材料教育部重点实验室上海 201804
2 同济大学材料科学与工程学院上海 201804

Microstructure of Hydrothermally Synthesized Fly Ash-based Tobermorite Doped with Aluminum

Xiaolu GUO^1,²(

), Fanjie MENG²

1 Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Tongji University, Shanghai 201804, China
2 School of Materials Science and Engineering, Tongji University, Shanghai 201804, China

引用本文:

郭晓潞, 孟凡杰. 水热合成粉煤灰基铝掺杂托贝莫来石的微观结构[J]. 材料研究学报, 2018, 32(7): 513-517.
Xiaolu GUO, Fanjie MENG. Microstructure of Hydrothermally Synthesized Fly Ash-based Tobermorite Doped with Aluminum[J]. Chinese Journal of Materials Research, 2018, 32(7): 513-517.

全文: PDF(2045 KB) HTML

摘要:

以纯试剂水热合成的铝掺杂托贝莫来石为参照,对比研究了水热合成粉煤灰基铝掺杂托贝莫来石的微观结构。结果表明：铝掺杂托贝莫来石在(002)晶面的晶面间距为1.156 nm,大于理想托贝莫来石的对应间距,并且相应Ca/(Si+Al)的比值增大而Si的含量降低,说明Al参与了托贝莫来石结构的重建,未参与重建的Al存在于结构层间;相比于纯试剂合成的水热产物,粉煤灰基铝掺杂托贝莫来石Si-O(Q¹)弯曲振动的特征峰和Si-O-Si弯曲振动的特征峰发生了蓝移,硅氧四面体链较短,聚合度较差;纯试剂合成的水热产物其微观形貌呈薄箔状形态,而粉煤灰基托贝莫来石的微观形貌为纤维状和片状缠绕而成的球状颗粒。

关键词 ：无机非金属材料, 粉煤灰, 纯试剂, 水热合成, 托贝莫来石, 铝掺杂, 微观结构

Abstract：

Microstructure and characterization of hydrothermally synthesized fly ash-based tobermorite doped with Al (FA-T) was investigated in comparison with the counterpart of hydrothermal product (T-A) synthesized from pure reagents. The results show that the interplanar spacing of (002) plane of FA-T was larger than that of T-A, correspondingly the ratio of Ca/(Si+Al) increased and the Si-content reduced. Because certain part of the doped Al was involved in the reconstruction of tobermorite structure and the rest part of Al existed in interlamellar spaces of the tobermorite structure . The wave-numbers of two absorption peaks, which belong to the bending vibration of Si-O (Q¹) and Si-O-Si for FA-T, were larger than those for T-A. These mean that the chains of [SiO₄]^4- for FA-T were shorter than those for T-A, and the degree of polymerization of FA-T was poor. The SEM results reveal that the T-A presents as thin foils, whilst the FA-T as spherical particles wound with fibrous and lamellar tobermorite.

Key words： inorganic non-metallic materials fly ash reagents hydrothermal synthesis tobermorite Al-doping microstructure

收稿日期: 2017-08-15

ZTFLH:

X773

基金资助:“十三五”国家重点研发计划重点专项(2016YFC0700802)、国家自然科学基金(51478328)、上海市自然科学基金(17ZR1442000)和中央高校基本科研业务费专项资金(22120180087)

作者简介:

作者简介郭晓潞,女,1980年生,教授,博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.197 或 https://www.cjmr.org/CN/Y2018/V32/I7/513

表1 粉煤灰的化学组成

表2 水热合成铝掺杂托贝莫来石单相的配比

表3 水热合成粉煤灰基铝掺杂托贝莫来石的配比,/g

图1 铝掺杂托贝莫来石的XRD图谱

表4 铝掺杂托贝莫来石的化学组成

图2 铝掺杂托贝莫来石的TG-DSC图谱

图3 铝掺杂托贝莫来石的IR图谱

图4 铝掺杂托贝莫来石的SEM照片

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