Buddhist Wall Paintings at Nako Monastery,North India: Changing of the Technology Throughout Centuries

The technical study of wall paintings from the Buddhist temple complex at Nako, Western Himalayas, was one of the basic preconditions required for designing an appropriate conservation strategy. The complex, composed of four temples from the eleventh–twelfth century, offered a unique possibility to carry out a comprehensive research of technology and painting materials used in early and later western Tibetan Buddhist wall paintings as well as a comparative assessment with murals from other sites in the Western Himalayas. The study was based on extensive fieldwork and an integrated analytical approach comprising a wide range of non-destructive and micro-destructive methods. Answering the question of the coevality of paintings in the smaller temples with other original murals, the precise characterisation of binding media, the detection of the yellow dye gamboge and natural minerals posnjakite and brochantite identified for the first time in Himalayan murals, the clarification of technology of metal decoration, and the making of raised elements are some of the most exciting results which emerged from the research.     

High-entropy-alloy nanoparticles with 21 ultra-mixed elements for efficient photothermal conversionOA

Multi-metallic nanoparticles have been proven to be an efficient photothermal conversion material, for which the optical absorption can be broadened through the interband transitions(IBTs), but it remains a challenge due to the strong immiscibility among the repelling combinations. Here, assisted by an extremely high evaporation temperature, ultra-fast cooling and vapor-pressure strategy, the arc-discharged plasma method was employed to synthesize ultra-mixed multi-metallic nanoparticles compose...     

纳米氢氧化镁合成及用于含铬废水处理的研究

用乙醇作分散剂,共沉淀法合成了纳米氢氧化镁。并用XRD、SEM等技术手段对样品作了表征。结果表明,制备的样品粒径分布均匀、团聚程度小,大小在200 nm左右。同时研究了纳米氢氧化镁用于含铬废水的处理,得到较好的效果,5 min时已经基本吸附完全,最大吸附量达到了102 mg/g,是普通氢氧化镁的2.5倍;回收后的氢氧化镁经焙烧后,可以多次用于含铬废水的处理。     

硝酸法处理废硬质合金回收金属钴和碳化钨

介绍了用硝酸法处理废硬质合金，回收金属钴和碳化钨的方法，并且设计了对废气氛氧化物的处理方法，消除了对环境的污染。是一种工艺简单，投资省，成本低，能耗少，污染小的回收工艺。     

硝石熔炼法从废顶锤中回收金属钨和钴

硬质合金顶锤、压缸是与生产人造金刚石的大吨位两面顶压机配套使用的组合模具.如进口爱尔兰的保尔特(BOART)和奥地利的普兰西(PLANSEE)顶锤、压缸均为WC—Co(YG)系硬质合金,废顶锤便于收集.探索了用硝石熔炼法处理废顶锤材料,制取金属钨粉和钴的生产工艺.     

离子注入对钛合金表面力学性能的影响

在钛基合金Ti-6AI-4V上分别注入3×10~(17)、6×10~(17)、9×10~(17)和2×10~(18)N~+/cm~2四种剂量的氮离了后,进行显微硬度的测定及通过划痕试验测定其耐磨性,结果表明:经离子注入后的钛合金,其显微硬度及耐磨性均有不同程度的提高,但其提高的程度与注入剂量的大小有关,其中,以6×10~(17)和9×10~(17)N~+/cm~2为佳,表明在离子注入技术用于材料改性时,注入剂量与材料表面性能的提高有着密不可分的关系。     

极谱分析法测定特种铝合金中铅和锌的含量

试验研究了特种铝合金中铅、锌含量的测定方法 ,通过对铝合金试样中铅、锌极谱波波高的测定 ,根据离子浓度与波高的线性关系 ,可测出铝合金中铅、锌的含量。     

镁基储氢合金材料的性能及研究进展

由于资源丰富,储氢容量较高,价格低廉,应用前景广阔等特点,镁基储氢合金材料成为近年来研究的热点,然而其稳定的热力学性和缓慢的动力学性限制了它的应用,因而对镁基储氢合金材料的改性日益成为了镁基储氢合金发展的重要方向,文章对镁基储氢合金材料的性能及改性方法进行了综述,并对其发展趋势进行了展望。     

MIBK萃取-火焰原子吸收光谱法测定钙镁磷肥中的镉

利用火焰原子吸收光谱法测定钙镁磷肥中镉的含量,探讨了仪器的工作条件,消化试剂的选择及加标回收率的测定.在最佳的工作条件下,钙镁磷肥中镉含量测定平均值为1.750 9μg/g,相对标准偏差(RSD)为5.6%,回收率为94.50%～103.71%.     

合金钢、铁合金中微量硼的测定

利用姜黄素在强酸非水介质中与硼酸生成有色络合物测定微量硼 ,并进行比色测定 ,方法检出限为 7 7× 10 - 8g mL ,相对标准偏差为 0 5 9% (3 3× 10 - 7g mL ,姜黄素 ,n =10 ) ,线性范围 :2 0× 10 - 7～ 1 2× 10 - 6g mL .