Results 31 to 40 of about 1,226,962 (133)

镀锌层无铬黑色钝化膜成分及其耐蚀性能

open access: yes四川大学学报. 自然科学版, 2012
为解决铬酸盐对环境的污染以及人体的伤害,本文采用新研发的硅酸盐黑色钝化工艺代替铬盐黑色钝化工艺,在镀锌层表面形成一层乌黑油亮的钝化膜.通过中性盐雾试验和电化学实验测试表明该钝化膜可以大大的提高镀层的耐蚀性能;通过SEM和金相观测到钝化后镀层的表面质量得到很大的提高;通过X光电子能谱(XPS)分析表明钝化膜由Zn、O、N、S、P以及Si元素组成,其中硅元素以胶态的SiO2和Zn5Si3O7(OH)2(PO4)2·4H2O的形式存在,并据XPS对黑色钝化膜的形成作出简要分析.
范云鹰   +4 more
doaj  

A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou   +12 more
wiley   +1 more source

电絮凝水处理技术阳极优化的研究

open access: yesGongye shui chuli, 2007
简介了电絮凝法处理废水的基本原理,重点探讨了目前电絮凝水处理技术中存在的阳极钝化问题,以及影响阳极钝化的主要因素,并提出了解决阳极钝化的方法和建议。在实际处理工艺中,可以从采用新型电极、磁场效应以及改进电源技术等方面着手,对工作阳极做进一步优化,降低电能消耗和材料消耗,以促进电絮凝水处理技术的推广应用。
张以忱, 钱炯, 左继成, 吴达
doaj   +2 more sources

Enhanced Low‐Frequency Microwave Absorption and Corrosion Resistance of FeSiAl Using Low‐Melting‐Point Glass Phase Coatings

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT This study developed a FeSiAl@LMPGP composite material to address the demand for low‐frequency electromagnetic absorption. Through controllable heat treatment, FeSiAl particles and PbO nanoparticles self‐assembled into a high‐density Mott–Schottky heterointerface structure, which exhibited a significant built‐in electric field (BIEF) effect ...
Yuqi Wang   +5 more
wiley   +1 more source

Interfacial Dipole Engineering With Taurine‐Modified SnO2 Electron Transport Layer for Efficient and Stable Perovskite Solar Cells

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Organic‐inorganic metal halide perovskite solar cells (PSCs) are promising for photovoltaics due to their excellent optoelectronic properties. However, achieving high efficiency and stability remains challenging, mainly due to defects and energy losses at the electron transport layer (ETL)/perovskite interface.
Jiahui Jin   +8 more
wiley   +1 more source

污泥添加粉煤灰堆肥化对Cu、Zn、Pb形态的影响

open access: yesShuitu Baochi Xuebao, 2011
污泥中重金属的危害是影响污泥土地利用的重要因素;污泥重金属危害不仅取决于总量,其形态分布更能反映重金属的迁移性以及生物有效性。实验以木屑为调节剂,粉煤灰作为钝化剂,研究污泥堆肥前后重金属Cu、Zn与Pb的形态分布变化。结果表明,堆肥对Cu有活化作用,而添加粉煤灰堆肥化能有效抑制这种活化,起到钝化作用,堆肥化使Pb向更稳定形态转化,添加粉煤灰堆肥化对Zn的钝化效果较好,当粉煤灰添加量为35%时,对Cu、Zn、Pb 3种重金属的易迁移态均具明显的钝化效果。
曾正中   +4 more
doaj  

田间条件下施用石灰石及调理剂降低土壤镉可提取性的效应

open access: yesShuitu Baochi Xuebao, 2021
原位钝化是镉污染稻田土壤修复的主要方法之一,钝化剂的选择对修复效果十分关键。通过3个田间试验和示范区对比调查研究了施用石灰石及主要调理剂对稻田土壤镉的钝化效应,并提出有效的技术措施。结果表明,施用足量石灰石(≥3.75 t/hm2,试验Ⅰ)、钙镁磷肥(3.75 t/hm2,试验III)和生物质炭(9.00 t/hm2,试验II;7.50 t/hm2,试验III)、石灰(3.00 t/hm2,试验III)碱性调理剂均能显著提高土壤pH,降低土壤Cd提取率 ...
王剑, 杨婷婷, 朱有为, 倪吾钟
doaj  

Recent Advances in Enhancing the Stability of CsPbI3 Perovskite Quantum Dots for Light‐Emitting Diodes

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT CsPbI3 quantum dots (QDs) have attracted considerable attention as promising candidates for light‐emitting diode (LED) applications. However, their intrinsic tendency to undergo a spontaneous phase transition to a nonperovskite structure significantly hampers their practical deployment. Considerable efforts have been devoted to stabilizing the
Yajing Chang   +12 more
wiley   +1 more source

一种土壤钝化剂及其制备方法

open access: yes, 2018
本发明提供了一种土壤钝化剂及其制备方法。其中土壤钝化剂的制备方包括:将粘土矿物与碱的混合物进行第一加热熔融并冷却以获得第一混合物,其中,所述粘土矿物与所述碱的摩尔比例为1:0.05~0.2;将所述第一混合物与无机磷酸盐混合进行第二加热熔融并冷却以获得第二混合物,其中,所述第一混合物与所述无机磷酸盐的摩尔比例为1:0.1~5。本发明的土壤钝化剂通过上述方法制得。该土壤钝化剂可实现高效、长效、廉价、无环境风险钝化耕地镉污染土壤,同时可为土壤持续提供硅肥、磷肥等肥料 ...
陈情泽   +4 more
core   +2 more sources

用抑制剂保护金属机理的新论据

open access: yesGongye shui chuli, 1982
本文作者通过化学计算、X光电子光谱法、放射性示踪物、化学极化等方法,对许多抑制剂钝化金属的机理进行了研究,详细阐述了有关吸附特性、化学键的性质、吸附粒子价态等方面的理论。作者指出,腐蚀抑制过程,如同钝化,是由于在金属表面发生吸附和生成相层引起的 ...
纪永亮
doaj   +2 more sources

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