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以摩尔组成为72P2O5-8Al2O3-20RO(R=Mg,Ca,Sr,Ba)和(77-x)P2O5-8Al2O3-(15 x)BaO(x=0,5,10,15,20)掺铒磷酸盐玻璃系统为研究对象,测量和计算了掺铒磷酸盐玻璃的各种光谱参数,探讨了不同网络修饰体及其含量对掺铒磷酸盐玻璃光谱性质的影响。结果表明:玻璃折射率nd、积分吸收截面∑sbs发射截面σemi,J-O强度参量Ωt以及自发辐射几率AR都有较强的成分依赖性,主要决定于Er^3 离子周围结构和Er-O键共价性的变化;减小Er-O键的共价性可得到较高的∑abs,σemi以及AR。 相似文献
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石成利 《建筑玻璃与工业玻璃》2007,(1):26-30
由于国内外大型激光惯性约束聚变装置的兴建和光通信的迅速发展,磷酸盐激光玻璃,尤其是激光钕玻璃得到了前所未有的发展。本文介绍了目前国内外磷酸盐激光玻璃,主要是掺钕、掺铒、掺镱磷酸盐激光玻璃的最新研究进展及其应用。 相似文献
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磷酸盐激光玻璃研究进展 总被引:5,自引:0,他引:5
由于国内外大型激光贯性约束聚变装置的兴建和光通信的迅速发展,磷酸盐激光玻璃。尤其是激光钕玻璃得到了前所未有的发展。本文介绍了目前国内外磷酸盐激光玻璃,主要是掺钕、掺铒、掺镱磷酸盐激光玻璃的最新研究进展。 相似文献
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采用熔融-淬火法制备了基体为30SiO2-20GeO2-15Al2O3-5B2O3-30CaF2的Er3+和Yb3+共掺锗硅酸盐玻璃.采用X射线衍射仪、荧光光谱仪和热分析仪对样品进行了表征.结果表明:Er2O3含量从0.5%(摩尔分数,下同)增加到2.0%时,玻璃转变温度Tg和Tx-Tg(Tx为第一析晶温度)数值均有明显下降.Yb2O3含量从1.5%增加到4.5%时,玻璃上转换红光发光强度数量级由103提高到105,对其中1个样品在740℃热处理12h后发现,微晶化处理并未对Er的上转换发光产生有益影响. 相似文献
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分析试验用磷酸盐乳浊玻璃的组成和熔制工艺,讨论用Ca_3(PO_4)_2做乳浊剂的优点,探讨用磷矿石做乳浊剂的可行性. 相似文献
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缓释玻璃微肥的初步研制 总被引:2,自引:0,他引:2
以磷酸盐为玻璃的基质成份,制备了含有不同微量元素的磷酸盐玻璃肥料。在不同pH值下,对肥料的溶解性能进行了实验,且对磷酸盐玻璃肥料的组成、结构与溶解度的关系进行了分析讨论。 相似文献
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以铁尾矿为主要原料、CaCO3和Na2CO3为发泡剂、Na3PO4×12H2O和硼砂(Na2B4O7×10H2O)为稳定剂,制备了性能良好的泡沫玻璃材料,并研究了工艺参数对制品性能的影响. 结果表明,CaCO3为主要发泡剂,Na2CO3含量对制品性能影响不大;Na3PO4×12H2O为主要稳定剂,Na2B4O7×10H2O含量不宜过多;发泡温度升高使制品孔径变大、容重和抗压强度降低;而烧结温度升高使制品的容重和抗压强度均先减小后增大. 制备泡沫玻璃适宜的工艺参数为(%, w):基础玻璃84, CaCO3 3, Na2CO3 2, Na3PO4×12H2O 8, Na2B4O7×10H2O 3, 发泡温度900~950℃,烧结温度1100℃. 由此制得的泡沫玻璃材料容重约为2.05 g/cm3,抗压强度达62 MPa左右. 相似文献
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Hung-Kai Ting Sam J. Page Gowsihan Poologasundarampillai Shu Chen Bobo Yu John V. Hanna Julian R. Jones 《International Journal of Applied Glass Science》2017,8(4):372-382
Bioactive glasses can heal bone defects and bond with bone through formation of hydroxyl carbonate apatite (HCA) surface layer. Sol-gel derived bioactive glasses are thought to have potential for improving bone regeneration rates over melt-derived compositions. The 58S sol-gel composition (60 mol% SiO2, 36 mol% CaO, and 4 mol% P2O5) has appeared in commercial products. Here, hydroxyapatite (HA) was found to form within the 58S glass during sol-gel synthesis after thermal stabilization. The preformed HA may lead to rapid release of calcium orthophosphate, or nanocrystals of HA, on exposure to body fluid, rather than the release of separate the calcium and phosphate species. Increasing the P2O5 to CaO ratio in the glass composition reduced preformed HA formation, as observed by XRD and solid-state NMR. Instead, above 12 mol% phosphate, a phosphate glass network (polyphosphate) formed, creating co-networks of phosphate and silica. Nanopore diameter of the glass and rate of HCA layer formation in simulated body fluid (SBF) decreased when the phosphate content increased. 相似文献
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Surface Analysis and Treatment of Extruded Fluoride Phosphate Glass Preforms for Optical Fiber Fabrication 下载免费PDF全文
Christopher A. G. Kalnins Nigel A. Spooner Tanya M. Monro Heike Ebendorff‐Heidepriem 《Journal of the American Ceramic Society》2016,99(6):1874-1877
Fabrication of fluoride phosphate glass optical fibers using the extrusion method for preform fabrication has been studied using the commercial Schott N‐FK51A glass. The extrusion step was found to create a surface layer of differing composition from the bulk glass material, leading to defects drawn down onto the optical fiber surface during fiber fabrication, resulting in high loss and fragile fibers. Similar phenomena have also been observed in other fluoride‐based glasses. Removal of this surface layer from preforms prior to fiber drawing was shown to improve optical fiber loss from >5 dB/m to 0.5–1.0 dB/m. The removal of this surface layer is therefore necessary to produce low‐loss fluoride phosphate optical fibers. 相似文献
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在化学组成为40Na 2O·60P2 O 5的基础上,用CaO、MgO取代Na 2O或用Al2 O 3、B 2 O 3和SiO2取代P2 O 5制备5种磷酸盐玻璃体系,用X射线衍射(XRD)和傅立叶变换红外光谱(FTIR)对玻璃结构进行了表征,并测定了该玻璃体系样品的密度、化学稳定性等基本性质。研究发现,用CaO取代Na 2O和Al2 O 3取代P2 O5可以显著改善玻璃的化学稳定性;用SiO2取代P 2 O 5时,玻璃的化学稳定性下降;由于配位问题,B 2O 3和MgO对磷酸盐玻璃结构与性能的影响出现转折点。 相似文献
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Toshihiro Kasuga Yoshimasa Hosoi Masayuki Nogami Mitsuo Niinomi 《Journal of the American Ceramic Society》2001,84(2):450-52
Calcium phosphate invert glasses, which contain P2 O7 2− and PO4 3− ions, have been prepared via the addition of a small amount of TiO2 . The formation of bonelike calcium phosphate apatite on the surface of the phosphate invert glasses was examined in simulated body fluid (SBF) at a temperature of 37°C. Soaking for 20 d resulted in the deposition of leaflike apatite particles on 6CaO·3P2 O5 ·TiO2 invert glass (based on molar ratio). The glass had much-greater chemical durability against SBF, in comparison with a metaphosphate glass; P ions were not dissolved excessively from the 6CaO·3P2 O5 ·TiO2 glass, so the apatite formation was not suppressed. 相似文献
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