Fine-Grained Antiperovskite Manganese Nitrides with Negative Thermal Expansion for Thermal Expansion Control of Light Transmitting Plastics
نویسندگان
چکیده
منابع مشابه
Adjustable zero thermal expansion in antiperovskite manganese nitride.
It is general knowledge that materials expand with increasing temperature and contract with decreasing temperature. Only few materials seem to neither expand nor contract over a certain temperature range and thus feature near zero thermal expansion (ZTE) behavior. These materials are the focus of recent scientifi c work [ 1–5 ] and have potential technical applications in both structural materi...
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Introduction Many materials which we encounter in everyday life expand on heating. This fact of life is easily highlighted with a simple experiment that we are all familiar with and involves a metallic sphere passing through a metal ring. At room temperature, the sphere is of such a size that it can easily pass through the ring, but after the sphere is heated, it will have expanded with the res...
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Most materials expand upon heating. However, although rare, some materials contract upon heating. Such negative thermal expansion (NTE) materials have enormous industrial merit because they can control the thermal expansion of materials. Recent progress in materials research enables us to obtain materials exhibiting negative coefficients of linear thermal expansion over -30 ppm K-1. Such giant ...
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Solid solutions with the composition Ba0.5Sr0.5Zn₂Si2-xGexO₇ and BaZn₂Si2-xGexO₇ were prepared with different values of x using a conventional mixed oxide route. Both compounds exhibit very different thermal expansion, which is due to the different crystal structures. Ba0.5Sr0.5Zn₂Si2-xGexO₇ solid solutions exhibit the structure of high-temperature BaZn₂Si₂O₇ and show negative thermal expansion...
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Negative thermal expansion (NTE) and magnetic properties were investigated for antiperovskite Ga1-x Cr x N0.83Mn3 compounds. As x increases, the temperature span (ΔT) of NTE related with Γ5g antiferromagnetic (AFM) order is expanded and shifted to lower temperatures. At x = 0.1, NTE happens between 256 and 318 K (ΔT = 62 K) with an average linear coefficient of thermal expansion, α L = -46 ppm/...
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ژورنال
عنوان ژورنال: Journal of the Japan Institute of Metals and Materials
سال: 2013
ISSN: 0021-4876,1880-6880
DOI: 10.2320/jinstmet.jaw201302