High Temperatures Necessitate Cooling Water-Cooled Power Feedthrough

• Application: High-Pressure Seals, High-Speed Seals, Mechanical Seals, Pump Seals, Rotary Seals
• Material: Alumina Ceramic
• Treatment: Glazed, Polishing
• Color: White+Metal
• Coating Thickness: 8-30μm
• Plated Layer: Nickel/Copper/Gold
• Processing Service: Welding, Moulding
• Plating Thickness: 2-9μm
• Max. Use Temperature: 1600ºC
• Material Composition: Alumina, Al2O3
• Type: Ceramic Parts
• Transport Package: Carton Packing
• Specification: Customized
• Trademark: INNOVACERA
• Origin: Fujian, China

Product Description

Water-cooled power feedthroughs are often used in applications where high temperatures necessitate cooling. This includes high-amperage applications where the cooling allows more amperage to be pushed through the conductor without raising temperatures past specs.

 

The typical applications is the connection terminals of vacuum furnaces and heaters. There are also high-frequency coils that enter and exit water. Generally, they are low-voltage and high-current, and a small part of them are high-voltage. Because the current passing through is relatively large, it is concerned that the temperature generated by the current will be too high. Therefore, internal water is generally used for heat dissipation. The diameter of the existing electrode conductive rod is 12mm (200A), 16mm (350A), 20mm (500A), 30mm (1000A).

 

Alumina Ceramic Properties
Properties	Units		Alumina Ceramic
Purity	wt%		95%	99%	99.8%
Volume Density	g/cm3		3.65	3.8	≥3.89
Water Absorption	%		0	0	0
Crystal Size(Grain Size)	μm		4-5	4-5	4-5
Vickers Hardness, HV1.0	Gpa		14	1600	≥15
Flexural Strength	Mpa		300	310	≥300
Coefficient of Linear Expansion	20-500ºC	1x10-6 mm/ºC	6.5-7.5	6.5-7.5	6.5~7.5
	20-800ºC		6.5-8.0	6.5-8.0	6.5~8.0
Thermal Conductivity	W/m·K( 20ºC)		20	25	≥20.9
Specific Heat Capacity	KJ/(kg·K)		≥0.8	≥0.8	≥0.8
Dielectric Strength	KV/mm		≥12	15*106	≥12
Volume Resistivity	Ω·cm 20ºC		≥1014	≥1014	≥1014
	Ω·cm 300ºC		≥1011	≥1011	≥1011
	Ω·cm 500ºC		≥109	≥109	≥109
Dielectric Constant	1MHz		9	9-10	9-10
Tangent of Dielectric Loss	1MHz		≤4x10-4	≤2x10-4	≤3x10-4
Surface Roughness	μm		0.4 After Machine	0.1-0.4 After Machine	0.1-0.4 After Machine
Max Working Temperature	ºC		1600	1600	1650