In photovoltaic silicon wafer cutting fluid, phenyl silicone oil exhibits excellent high temperature defoaming performance due to its unique molecular structure, which is specifically reflected in the following aspects:

1. High temperature resistance
Thermal stability: Phenyl silicone oil has high thermal stability and can maintain the stability of its physical and chemical properties in high temperature environment. This characteristic enables phenyl silicone oil to effectively play a defoaming role in the photovoltaic silicon wafer cutting process, even in the face of high temperature environment, without decomposition or failure due to high temperature.
Antioxidation: Phenyl silicone oil also has good antioxidant properties and can resist oxidizing substances that may exist in the cutting fluid, thereby extending its service life and ensuring continuous and stable defoaming effect under high temperature cutting conditions.

2. Defoaming performance
Low surface tension: Phenyl silicone oil has low surface tension and can quickly penetrate into the liquid film of the foam, destroying the stability of the foam, thereby achieving the purpose of defoaming. In photovoltaic silicon wafer cutting fluid, this characteristic enables phenyl silicone oil to quickly eliminate the foam generated during the cutting process and improve the cleanliness and cutting efficiency of the cutting fluid.
Persistence: Compared with some traditional defoamers, phenyl silicone oil has a more lasting defoaming effect in cutting fluid. It can be evenly dispersed in the cutting fluid to form a stable defoaming system, maintain the defoaming effect for a long time, and reduce cutting problems caused by foam accumulation.

3. Advantages of application in photovoltaic silicon wafer cutting fluid
Improve cutting quality: By eliminating foam in the cutting fluid, phenyl silicone oil helps reduce vibration and fluctuations during the cutting process, thereby improving the cutting quality and surface finish of photovoltaic silicon wafers.
Extend equipment life: The accumulation of foam may cause clogging and wear of cutting equipment, and the defoaming effect of phenyl silicone oil can reduce this risk and extend the service life of the equipment.
Optimize cutting efficiency: A stable cutting fluid environment helps to improve cutting speed and efficiency. Phenyl silicone oil provides strong support for efficient cutting of photovoltaic silicon wafers by maintaining the cleanliness and stability of the cutting fluid.