Thư viện tài liệu, ebook tổng hợp lớn nhất Việt Nam

4. CONCLUSION Near infrared Zn2SiO4 phosphor has been produced successfully by high-energy ball milling technique followed by annealing in air. The XRD and Raman measurements reveal the formation of Zn2SiO4 phase with the annealing temperature of 1250 C. This high-temperature annealing powder emits intensively in the near infrared peaking at 74...

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4. CONCLUSION By usinng solvothermal method, graphene nanoplatelets and its magnetic composite MnFe2O4/GNPs were succesfully synthesized, as confirmed by XRD method. The condition of reaction was studied and 200 °C was the proper temperature, at lower temperature, undesired products were formed instead. The morphology and size of crystal were e...

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Nhiệm vụ tháp tăng ẩm: • Tăng kích thước hạt mù axit • Giảm nhiệt độ xuống thêm 3-50C Nếu quặng chứa nhiều hợp chất flo (HF, SiF4) thì dùng kiểu tháp rửa I, ngược lại dùng tháp rửa II

50 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 1084 | Lượt tải: 0

4. CONCLUSION In summary, we have studied the structural, magnetic properties of solid solution 0.9Bi0.5K0.5TiO3 + 0.1BiFe1-xCoxO3. The results were in good agreement with the previous reports of BKT – BFO and BKT-BCO solid solutions. The magnetic properties were investigated via unsaturated M-H loop, which showed the competition of paramagneti...

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Cấu hình e hóa trị 3s của Na: Miền hóa trị chỉ có IN e nên nó chỉ mới được điền đầy một nửa. Một nửa miền còn lại tự do và đóng vai trò miền dẫn. Khi kích thích nhẹ, ví dụ tác dụng lên kim loại một điện trường, các e hóa trị dễ dàng chuyển lên những orbital còn tự do theo hướng của điện trường, thể hiện tính dẫn điện.

89 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 974 | Lượt tải: 0

4. CONCLUSIONS This paper reports our first results on the synthesis of nanosilica from rice husk. The nanosilica is an effective adsorbent for the removal of CV dye from aqueous solutions and theSynthesis of nanosilica from rice husk and optimization of the removal of crystal violet dye best removal yields were investigated with contact time...

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4. CONCLUSION In summary, we have reported the first of out attempt to creation of the Mn4+-doped K2SiF6 phosphor by one step co-precipitation process. Concequently, pure phase of cubic K2SiF6 is achieved. K2SiF6 doped 5 % content of Mn4+ shows the strong emission in red light spectrum corresponding to the 609, 614, 631, 635 and 647 nm emission...

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4. CONCLUSION In this work, high-quality magnetic fluid was synthesized by thermal decomposition with using poly (maleic anhydride -alt-1-octadecene) (PMAO) as phase transfer ligand. The additional organic coating layer has improved the stability of magnetic particles in aqueous solutions. The average diameter of the coated particles was 16.1 ±...

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4. CONCLUSIONS We synthesized magnetic hydrogel by the in-situ co-precipitation method. Two in-situ coprecipitations were performed. The process that involved the initial formation of calcium alginate hydrogel before incorporation with iron ion and co-precipitation to afford in-situ magnetic nanoparticles in alginate hydrogel showed the most eff...

7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 672 | Lượt tải: 0

4. CONCLUSION Pozzolanic additive has reduced the compresive strength of cement when mixed separately. However, when pozzolanic additive is mixed with gypsum additive, this additive mixture has increased the compresive strength of the cement at the late time (at the age of 28 days, the compresive strength of sample TP22 was 55.4 MPa; sample P22...

7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 626 | Lượt tải: 0