在烧结过程中新产生的Ca-Feldspar增强了煤基绝缘的机械强度
Yangfan Zheng1, Jiayan Cui1, Pengxiao Gao1
1School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
Materials (Basel, Switzerland)
|November 25, 2023
概括
这项研究开发了高强度的绝热从煤炭,一个采矿废物. 最佳组合实现了22.5 MPa的压力强度和低热导率,提供可持续的建筑材料.
科学领域:
- 材料科学 材料科学 材料科学
- 废物管理 废物管理
- 建筑工程工程 建筑工程
背景情况:
- 煤炭是煤炭开采的重要固体废物,导致土地占用和土壤污染等环境问题.
- 煤炭的资源利用对于可持续发展和减轻环境污染至关重要.
- 从工业副产品开发增值产品解决了废物管理的挑战.
研究的目的:
- 开发高强度的绝热,使用煤炭作为主要材料.
- 为了确定这些的最佳原材料组成和烧结温度.
- 为了研究基于煤的隔热的微观结构和形成机制.
主要方法:
- 系统分析原材料比率 (煤,K-,CaCO3,飞灰) 和烧结温度.
- 生产的压力强度和导热性的表征.
- 微结构分析和烧结形成机制的研究.
主要成果:
- 最佳组成:65重%的煤炭,15重%的K-野,10重%的CaCO3,10重%的飞灰.
- 最佳的烧结温度: 1150°C.
- 由此产生的属性:压力强度为22.5 MPa,导热率为0.39 W m−1 k−1.
- 形成机制:CaCO3分解释放CO2用于毛孔,K-feldspar促进Ca-feldspar的形成,增强Si-O网络和强度.
结论:
- 高强度的绝热可以成功地从煤炭中生产出来.
- 开发的提供了出色的机械和热绝缘性能.
- 这种方法为煤炭废弃物利用提供了可持续的解决方案,并创造了有价值的建筑材料.
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