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However, THF is hard to manufacture the hollow thin-walled parts which have big length-radius and complex cross-sectional, due to the bad filling property and thinner wall thickness of tube if the materials in axial of tube can not be supplied in time.
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Silicate-based luminescent materials have good chemical and thermal stability, simple synthesis process, low-cost raw materials and easy availability.
The samples are prepared by high temperature solid phase reaction method,, design formula according to chemical formula M0.955Al2–xGaxSi2O8 (M=Ca, Sr, Ba; x = 0~1.0), accurately weigh each raw material CaCO3(AR), SrCO3(AR) , BaCO3(AR), Ga2O3(99.99%), Al(OH)3(AR), H2SiO3(AR), Eu2O3(99.99%), add appropriate amount of flux H3BO3(GR), grind and mix thoroughly in an agate mortar Evenly, put it into a corundum crucible, and pre-fire for 2.5h in a muffle furnace at 1000°C in a weak reducing atmosphere.
Acknowledgements This work was supported by grants from Science and Technology Innovation Project of Nanjing Military Region (15MS050), the Key projects of the Department of Education of Anhui Province (KJ2016A893, KJ2019A0888), the quality engineering project of Anhui Education Department (2018mooc112), the Support Project for Outstanding Young talents in Colleges and Universities of Anhui Province(gxyq2018126, gxyq2021237), the scientific research project of Anhui Sanlian University (KJZD2021009, KJZD2018004, 2015Z001, 2013Z001).
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Actually, residual stress and material alteration have been aroused from the beginning of that the section was formed from a thin steel strip.
(3) Here, Fy is yield stress of material, E is elastic modulus, and c is half of rectangular section height.
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Foundation of China (Grant No. 71102131), Humanity and Social Science Youth foundation Department of the Ministry of Education, China(Grant No. 10YJC790189), the Natural Science Foundation of Heilongjiang Province, China (Grant No.
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Introduction Carbon nanotubes (CNTs) are stiff and very strong molecular-scale tubes of carbon-based nanomaterials [1,2] which received increasing amount of interest due to their unique and extraordinary physicochemical properties and wide-ranging applications in materials science [3].
Optimization of the materials have been done using the Gamma point algorithm.
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Testing Methods and Materials The mixtures of concrete specimens for our experiment are shown in Table 1.
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