Impact of Hard Magnetic Nanocrystals on the Properties of Hardened Cement Paste

被引：0

作者：

Kissling, Patrick A. ^{[1
,2
]}

Mahlbacher, Markus ^{[2
]}

Wesemann, Christoph

Mundstock, Alexander ^{[1
]}

Luebkemann-Warwas, Franziska ^{[1
]}

Klimke, Stephen ^{[3
]}

Renz, Franz ^{[3
,4
]}

Lohaus, Ludger ^{[2
]}

Haist, Michael ^{[2
]}

Bigall, Nadja C. ^{[4
]}

机构：

[1] Leibniz Univ Hannover, Inst Phys Chem & Electrochem, Callinstr 3A, D-30167 Hannover, Germany

[2] Leibniz Univ Hannover, Inst Bldg Mat Sci, Appelstr 9A, D-30167 Hannover, Germany

[3] Leibniz Univ Hannover, Inst Inorgan Chem, Callinstr 3-9, D-30167 Hannover, Germany

[4] Leibniz Univ Hannover, Lab Nano & Quantum Engn LNQE, Schneiderberg 39, D-30167 Hannover, Germany

来源：

CHEMIE INGENIEUR TECHNIK | 2024年 / 96卷 / 03期

关键词：

Analytical methods; Hydrated and hardened cement paste; Material science; Hard magnetic nanocrystals; NEUTRON POWDER DIFFRACTION; CRYSTAL-STRUCTURE; NANO-SILICA; FLY-ASH; MICROSTRUCTURE; HYDRATION; NANOPARTICLES; TEMPERATURE; BEHAVIOR; MORTAR;

D O I：

10.1002/cite.202300022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this work, nano-sized hard magnetic gallium-substituted iron oxide crystals, wherein gallium is used to stabilize the metastable epsilon iron oxide phase, were added to cement-water suspensions at different ratios, which were subsequently hydrated for at least 28 days. It is shown that higher contents of such nanocrystals in the hardened cement paste introduce a magnetic moment, whereas the mechanical properties remain unchanged compared to non-blended hardened cement paste for a wide concentration range. The impact of different amounts of incorporated hard magnetic Ga0.043Fe1.957O3 (85 % & epsilon; and 15 % & alpha; phase) nanocrystals (NCs) on the physical properties of hardened cement paste is shown. By adding these Fe2O3 NCs it is possible to modify the manifold properties simultaneously, thus, enabling fine-tuned buildings or coatings. image

引用

页码：300 / 308

页数：9

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