Edwards IOTA705 is a high-performance diffusion pump oil specifically designed for ultra-high vacuum systems. Its physical form is a colorless, transparent oily liquid, a characteristic that allows users to visually inspect the condition and cleanliness of the oil. The core value of this oil lies in its carefully engineered physical and chemical properties, enabling it to meet the extremely demanding requirements of vacuum environments.

First and foremost, the most critical performance characteristic of IOTA705 is its extremely low saturated vapor pressure. Saturated vapor pressure refers to the pressure exerted by the vapor of a liquid when evaporation reaches equilibrium at a specific temperature. In vacuum technology, the saturated vapor pressure of the pump oil directly determines the ultimate pressure the vacuum system can achieve. If the saturated vapor pressure of the pump oil is too high, its continuously evaporating molecules in the vacuum chamber become a new source of gas, severely contaminating the vacuum environment and preventing the attainment and maintenance of the required high or ultra-high vacuum. The extremely low saturated vapor pressure of IOTA705 ensures that it hardly volatilizes at operating temperatures, providing a fundamental guarantee for the system to achieve extremely high vacuum levels.

Secondly, the oil exhibits excellent thermal stability. The working principle of a diffusion pump involves heating the oil with an electric heater to generate high-speed oil vapor jets that evacuate gas molecules. This means the pump oil must operate at high temperatures for extended periods. Ordinary oils would crack, carbonize, and produce light components and residues under such conditions, leading to a sharp decline in performance and potential clogging of the pump. The high thermal stability of IOTA705 allows it to withstand sustained high temperatures without significant decomposition, ensuring the diffusion pump operates reliably over the long term.

Additionally, IOTA705 demonstrates outstanding oxidation resistance. During the operation and maintenance of vacuum systems, it is inevitable that the system will be briefly exposed to the atmosphere. Oxygen in the air can react with the oil at high temperatures, causing it to degrade, generate acidic substances and sludge, darken in color, increase in viscosity, and corrode internal pump components. Its strong oxidation resistance effectively delays this process, extending the oil's service life and reducing the frequency and cost of equipment maintenance.

Thanks to these exceptional comprehensive properties, Edwards IOTA705 diffusion pump oil is widely used in numerous industrial and scientific research fields that require extremely high vacuum environments. In high-vacuum metallurgy, it is used to create a pure, oxygen-free environment, preventing metal oxidation at high temperatures and enabling the smelting of high-quality special alloys. In the electron tube, bulb (including modern LED and specialty light source manufacturing), and display industries (such as OLED evaporation), it is used to remove impurity gases, ensuring the longevity and luminous quality of internal filaments, electrodes, and phosphors. In high-vacuum coating (PVD) processes, it is the foundation for obtaining pure, uniform, and durable functional films (e.g., optical films, wear-resistant films, conductive films). Furthermore, in cutting-edge scientific research equipment such as nuclear accelerators, electron microscopes, and surface analysis instruments, the ultra-high vacuum environment provided by IOTA705 is a prerequisite for efficient particle beam transmission, high-resolution imaging, and precise analytical testing.

In summary, with its extremely low saturated vapor pressure, excellent thermal stability, and oxidation resistance, Edwards IOTA705 ultra-high vacuum diffusion pump oil serves as a critical functional material, providing indispensable technical support for modern high-tech industries and frontier scientific research.