TEMPERATURE CONTROLLED CHAMBER FOR X-RAY DIFFRACTION SPECIMENS

X 射线衍射样品的温控室

• 批准号: 3959937
• 负责人: C P MUDD
• 金额: --
• 依托单位: DIVISION OF RESEARCH SERVICES
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3959937
• 关键词: X ray crystallography; aluminum; carbonates; electrodes; temperature

Two new temperature-controlled chambers were constructed and evaluated. The new units incorporated a linear feedback sensor and bipolar power supply to allow regulation at any temperature between -3 deg. C and +85 deg. C. The set temperature is entered via a 3-digit thumb wheel switch and the sample temperature is read out on a 3 1/2 digit display. The time required for 95% response to a 10 deg. C change in the set temperature is approximately 70 seconds. The time required for 95% response to a change from 0 deg. C to 70 deg. C is approximately 300 seconds. At equilibrium, the baseline stability is +/- 15 milli-deg. C. Two types of cells were developed to contain the sample under investigation. The first is a simple closed cell in which the sample solution is sealed between two mylar wafers in an aluminum cell. The second type of cell is open and can be flushed during runs without removal from the chamber.

建造了两个新的温控室， 评估。 新的单位纳入了线性反馈传感器 和双极电源，允许在任何温度下进行调节 在-3 deg. +85 ℃。C. 设定温度 通过3位拇指轮开关输入， 温度在3 1/2数字显示器上读出。 的时间 要求对10度的95%响应。C改变设定 温度约为70秒。 所需的时间 95%的响应从0度的变化。C至70度。C是 大约300秒。 在平衡状态下，基线稳定性 是± 15毫度C. 开发了两种类型的细胞， 包含正在调查的样本。 第一个是简单的 封闭的细胞，其中样品溶液密封在两个 铝电池中的聚酯薄膜晶片。 第二种细胞是开放的 并且可以在运行过程中冲洗而不从腔室中移除。