Product Name:
99% High-Purity Alumina Thermocouple Insulator (Multi-bore)
Product Material:
99% Alumina ($Al_2O_3$), optional 99.7% for high-vacuum or noble metal thermocouple applications.
Material Characteristics:
Superior high-temperature electrical insulation, Excellent thermal conductivity (for rapid thermal response), High mechanical strength, Outstanding chemical stability to prevent contamination of thermocouple wires, Service temperature up to 1700°C.
Configuration Options:
Single-bore, Twin-bore (Standard), Four-bore, or Multi-bore (customized configurations available).
Application Fields:
Noble metal thermocouple (Type S, R, B) insulation, Industrial furnace temperature sensors, Laboratory heating equipment, Aerospace engine temperature monitoring, Molten metal temperature probes, Semiconductor diffusion furnaces.
Application Industries:
Biomedical (High-temp sterilization), Advanced Machinery (Heat treatment furnaces), New Energy (Battery kiln monitoring), Fluid Control (High-temp gas sensors), Electronic Engineering (Sensing hardware), Aerospace (Thermal sensors), Petrochemical (Refinery temperature monitoring), Broad Semiconductor (Wafer thermal processing).
Processing Difficulties:
Achieving uniform and small diameter bores (down to 0.3mm) in long tubes, Maintaining strict straightness over long lengths to prevent wire snagging, Controlling consistent wall thickness to ensure balanced thermal response and dielectric integrity.
Processing Flow:
Raw material mixing → Precision Extrusion → Air-drying and straightening → High-temperature sintering (1700°C+) → Diamond cutting to length → End chamfering (for easy wire insertion) → Ultrasonic cleaning → Insulation Resistance testing → Secure packaging.
Delivery Period:
Standard sizes (Twin-bore 1-5mm OD): 7-15 days, Customized multi-bore or extra-long insulators: 20-35 days.
Our 99% Alumina Thermocouple Insulators are designed to provide maximum reliability in high-temperature measurement. The high-purity composition ensures that no trace elements leach into noble metal thermocouple wires, which could cause calibration drift. With a dense, fine-grained structure, these insulators offer exceptional dielectric strength and thermal shock resistance. Available in a variety of bore configurations and lengths, they are the trusted choice for maintaining electrical isolation in the most demanding industrial kilns and vacuum furnaces.
Key Features:
Ultra-High Temperature Stability: Maintains shape and insulating properties in continuous environments up to 1650°C.
Chemical Purity: 99%+ Alumina prevents platinum wire contamination, ensuring long-term sensor accuracy.
Rapid Thermal Response: Optimized wall thickness allows for fast heat transfer to the sensor wires.
Smooth Bore Finish: Minimizes friction during wire threading, reducing the risk of thin-wire breakage.
Exceptional Straightness: Facilitates easy installation into protective outer tubes or thermowells.
