As a specialty silicone rubber material, high-phenyl silicone exhibits unique performance advantages in ablation resistance applications, making it an irreplaceable material choice in multiple key areas. The following provides a detailed analysis from three perspectives: material properties, comparative advantages, and application cases.

Characteristics of High-Phenyl Silicone Ablation Resistance
High-phenyl silicone significantly enhances the ablation resistance of the material by introducing phenyl groups into the polysiloxane backbone:

Phenyl Content and Performance Relationship: When the phenyl content reaches 30% or more, it is called high-phenyl silicone rubber and exhibits excellent ablation resistance. Medium-phenyl silicone rubber (phenyl content 20%-34%) also exhibits ablation resistance and high-temperature resistance.

Temperature Range: High-phenyl silicone has an extended temperature range of -70°C to 350°C, with short-term operating temperatures reaching -110°C to 400°C, far exceeding the temperature limit of ordinary silicone rubber.

Self-extinguishing properties: Medium-phenyl silicone rubber is self-extinguishing, effectively resisting high-temperature ablation and resisting sustained combustion in flame environments.

Molecular structural advantages: The phenyl structure increases the rigidity of the molecular chain, ensuring the material maintains structural stability and functional integrity in high-temperature ablation environments.

High-phenyl silicone offers the following irreplaceable advantages over other ablation-resistant materials:

Performance:              High-phenyl silicone              Ordinary silicone               Fluororubber               Fluoroether rubber
Temperature range:            -70°C-350°C                    -60°C-200°C                   -20°C-250°C                  -40°C-300°C
Ablation resistance:     Excellent (self-extinguishing)          Fair                              Good                              Good
Phenyl content:                  20%-34%+                         None                              None                             None
Short-term temperature resistance: Up to 400°C              200°C                            250°C                           300°C
Low-temperature performance:   -70°C                           -60°C                            -20°C                             -40°C
Typical applications: Aerospace, nuclear power           General industry           Hydraulic systems            Semiconductors
Compared to ordinary silicone: High-phenyl silicone has a temperature resistance limit of over 150°C higher and possesses self-extinguishing and ablation resistance properties that ordinary silicone lacks.

Compared to fluororubber: While fluororubber offers better oil resistance, high-phenyl silicone maintains elasticity over a wider temperature range and exhibits superior low-temperature performance.

Balanced Performance: High-phenyl silicone offers an optimal balance between ablation resistance, temperature resistance, and low-temperature performance, a combination difficult to achieve with other single materials.

Aerospace:
Thermal coatings for missiles and spacecraft withstand prolonged ablation in high-Mach airflow.
High-temperature sealing materials maintain sealing performance in high-temperature engine areas.

Defense:
Ablation-resistant components for weapons and ships.
High-temperature protective materials for drone manufacturing.
Electronic packaging materials requiring both radiation and ablation resistance.

New Energy:
Radiation-resistant and ablation-resistant seals for nuclear power equipment.
Lithium battery and photovoltaic packaging materials requiring high-temperature and weather resistance.

Special Environment Applications:
Tactical missile exterior protective coatings using modified silicone resins and elastomers.
Low-temperature ablation-resistant components for polar research equipment.