Effect of alumina source on the densification, phase evolution, and strengthening of sintered mullite-based ceramics from milled coal fly ash
Effect of alumina source on the densification, phase evolution, and strengthening of sintered mullite-based ceramics from milled coal fly ash
复制标题
氧化铝源对粉煤灰烧结莫来石陶瓷致密化、相演化和强化的影响
DOI：
10.1016/j.conbuildmat.2019.116851
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发表时间：
2019-12
影响因子：
7.4
通讯作者：
Zhiyong Liu
中科院分区：
文献类型：
--
作者：
Jinshan Lu;Zhipeng Zhang;Yingde Li;Zhiyong Liu
以粉煤灰为原料，采用Al（OH）3、Al 2 O3和勃姆石三种不同的氧化铝源制备莫来石基陶瓷。研究了氧化铝源和烧结温度对陶瓷致密化和相演变的影响。在三种氧化铝源中，勃姆石产生最大的陶瓷致密化和结晶化，并且确定了1100 °C的最佳烧结温度。随着勃姆石加入量的增加，结晶度和莫来石相增加，而方石英相减少。体积密度和弯曲强度值分别为2.72 g/cm 3和155 MPa，实现了勃姆石含量为11.8%。烧结陶瓷由莫来石和钙长石相组成，其特征在于结晶度为82.8%。此外，颗粒细化的原料进行长时间球磨促进致密化和莫来石化在相对较低的温度。烧结陶瓷的强化归因于致密化程度的提高、结晶的增强和莫来石相的增加。研究结果为粉煤灰在高强度陶瓷砖中的再利用提供了可能。
Different alumina sources (Al(OH)3, Al2O3, and boehmite) were used to prepare mullite-based ceramics from milled coal fly ash. The effect of alumina source and sintering temperature on the densification and phase evolution of these ceramics was investigated. Among the three alumina sources, boehmite yielded the greatest densification and crystallization of the ceramics, and an optimal sintering temperature of 1100 °C was identified. The crystallinity and mullite phase increased with increasing boehmite addition, whereas the cristobalite phase decreased. Bulk density and flexural strength values of 2.72 g/cm3and 155 MPa, respectively, were realized at a boehmite content of 11.8%. The sintered ceramic consisted of mullite and anorthite phases, and was characterized by a crystallinity of 82.8%. Furthermore, particle refinement of raw materials subjected to prolonged ball milling promoted densification and mullitization at relatively low temperatures. The strengthening of the sintered ceramics was attributed to the improved densification, enhanced crystallization, and increased mullite phase. These results will enable the successful reutilization of coal fly ash in the high-strength ceramic tiles.
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影响因子：
5.2
作者：
Patil, Akshata G.;Anandhan, S.
通讯作者：
Anandhan, S.
影响因子：
4.5
作者：
K. Xia;T. Langdon
通讯作者：
K. Xia;T. Langdon
回收产品的生态设计：从粉煤灰中再生莫来石
影响因子：
13.2
作者：
Shi Jingjing;Li Qiang;Li Huiquan;Li Shaopeng;Zhang Jianbo;Shi Yao
通讯作者：
Shi Yao
影响因子：
5.2
作者：
T. Mukhopadhyay;Saswati Ghosh;J. Ghosh;S. Ghatak;H. S. Maiti
通讯作者：
T. Mukhopadhyay;Saswati Ghosh;J. Ghosh;S. Ghatak;H. S. Maiti
影响因子：
3.9
作者：
R. Leonard;S. Gray;Carlos Alvarez;A. Moses;L. Arrowood;A. Lubinsky;A. Petford-Long;J. Johnson
通讯作者：
R. Leonard;S. Gray;Carlos Alvarez;A. Moses;L. Arrowood;A. Lubinsky;A. Petford-Long;J. Johnson