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相关概念视频

Atomic Absorption Spectroscopy: Atomization Methods01:25

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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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对于表面声波原子化器的热应力分析和控制方法

Xufeng Xue1,2, Baile Cui2,3, Xianping Chen1,2

  • 1College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.

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|November 14, 2023
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概括

这项研究涉及表面声波 (SAW) 原子化器中的热应力. 一种功率控制方法有效地降低了热应力,防止了原子化器故障.

关键词:
原子化是原子化的过程.表面声波是一种表面声波.热应力是一种热应力.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 声学 声学 在声学方面

背景情况:

  • 表面声波 (SAW) 原子化器在运行过程中由于热应力度而面临潜在故障.
  • 了解热升高过程对于防止设备故障至关重要.

研究的目的:

  • 为了研究SAW原子化器中的热升高过程.
  • 提出并验证温度调节方法以减轻热应力.
  • 为了防止SAW喷雾器因热应力引起的潜在故障.

主要方法:

  • 收集了使用水,橄油和糖醇在不同功率水平 (5/6/7 W) 的SAW雾化器的温度上升数据.
  • 在不同的操作条件下获得的表面温度曲线和模拟的应力变化.
  • 分析了最大应激发生时间,并根据实验数据开发了控制策略.

主要成果:

  • 在初始工作阶段,无论介质如何,SAW喷雾器都会在初始工作阶段出现快速加热.
  • 压力水平在不同介质上有所不同,但初始加热是一个一致的问题.
  • 在原子化开始后4秒内控制驱动功率,可以有效地避免在加热过程中过度应激.

结论:

  • 一种拟议的功率控制方法,在前2秒内将驱动功率限制在3W,有效地降低了热应力.
  • 这种方法可以防止热应力引起的裂纹,并提高SAW喷雾器的可靠性.
  • 这些发现为改善SAW喷雾器的运行寿命提供了实际解决方案.