添加Al对TiZrV非可蒸发的Getter材料相位结构和Gettering性能的影响
Lulu Wang1,2,3, Yang Li1,2, Deyu Guo1,2
1State Key Laboratory for Advanced Materials for Smart Sensing, GRINM Group Co., Ltd., Beijing 100088, China.
Materials (Basel, Switzerland)
|May 11, 2024
概括
将 (Al) 添加到散装,,,,, (TiZrV) 非蒸发性获取器 (NEG) 材料中,可显著提高其气体吸收能力,降低激活温度. 这种优化使得和一氧化碳的传动性能提高了40%以上.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 真空技术 真空技术
背景情况:
- 氧化瓦纳 (TiZrV) 是一个关键的非蒸发性 (NEG) 材料.
- 研究主要集中在薄膜TiZrV上,对散装TiZrV的研究有限.
- 大量NEG材料对于真空系统的性能至关重要.
研究的目的:
- 通过结合 (Al) 来优化散装TiZrV获取器材料.
- 调查Al添加对相位结构,激活性质和动性能的影响.
- 为增强散装TiZrV采集器特性提供见解.
主要方法:
- 将TiZrV与Al合金,以产生TiZrVAl样本.
- 使用X射线衍射 (XRD) 或类似技术分析相位结构.
- 在现场的X射线光电子光谱 (XPS) 来研究激活特性.
- 测量 (H2) 和一氧化碳 (CO) 的排放性能.
主要成果:
- 添加Al改变了相结构,从α-Zr和Ti2Zr变成Ti-Zr,Al-Zr和Al-Ti相.
- 新阶段促进了和氧原子的扩散.
- 在现场XPS证实了激活温度的显著下降.
- 气和二氧化碳的化率分别增加了40.7%和40.3%,达到2073cm3·s-1和1912.8cm3·s-1.1.
结论:
- 加有效地优化了散装TiZrV获取器.
- 经过修改的TiZrVAl材料表现出更好的激活和增强的气体获取能力.
- 这项研究为开发先进散装NEG材料提供了有价值的策略.
相关概念视频
02:24Introduction to Electrophilic Addition Reactions of Alkenes
The double bond in a simple, unconjugated alkene is a region of high electron density that can act as a weak base or a nucleophile. The filled π orbital (HOMO) of the double bond can interact with the empty LUMO of an electrophile. A bonding interaction occurs when the electrophile attacks between the two carbons; the electrophile then accepts a pair of electrons from the π bond and undergoes addition across the double bond, yielding a single product.
Addition and elimination reactions can be...
Addition and elimination reactions can be...
02:38Electrophilic Addition to Alkynes: Halogenation
Introduction
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
02:35Electrophilic Addition to Alkynes: Hydrohalogenation
Electrophilic addition of hydrogen halides, HX (X = Cl, Br or I) to alkenes forms alkyl halides as per Markovnikov's rule, where the hydrogen gets added to the less substituted carbon of the double bond. Hydrohalogenation of alkynes takes place in a similar manner, with the first addition of HX forming a vinyl halide and the second giving a geminal dihalide.