Silicon Nitride Ceramic Coil Core

 Silicon nitride coil supports are widely used as sensors in underground mining, geological exploration and other fields.

As the coil rack of the sensor coil, the silicon nitride coil rack mainly applies the ultra-high hardness performance of silicon nitride ceramics and the nonmagnetic insulation of Silicon Nitride (Si3N4) Ceramic. As the sensor coil rack, it must be insulated and nonmagnetic in order to accurately transmit the collected data; At the same time, as a sensor for depth exploration, the underground environment is generally complex, and only the support with high hardness can protect the sensor from damage. In addition, the silicon nitride support has certain protective effects on the sensor coil due to its anti-corrosion, high and low temperature resistance, and low coefficient of thermal expansion.

Applications:
Induction ceramic coil of induction instrument in practical oil well logging instruments
In the field of medical imaging equipment, such as magnetic resonance imaging (MRI) systems, gradient coil stents are used as core components

Silicon Nitride Ceramic Material Properties

Properties	Unit	Value
Density	g/cm3	3.2±0.05
Relative density	%	>99.5
Elastic Modulus	GPa	300~320
Crushing Load Ratio (25℃)	%	≥40
Hardness	(HRA)	91
Fracture Toughness	MPa·m1/2	6.0~7.0
Flexural Strength	MPa	600~700
Poisson’s Ratio	–	0.25
Coefficient of Thermal Expansion	10-6 /K	2.3~3.2
Weibo Modulus	Gpa	10~12
Thermal Conductivity	–	15~20
Resistivity	W/(m·K)	1018
Acid and Alkali Corrosion Resistance	–	Excellent
Dimensional Stability	–	Excellent
Magnetism	–	None
Oxide Content	%	8

Benefits：
High strength over a large temperature range
High fracture toughness
Good flexural strength
Mechanical fatigue and creep resistant
Lightweight – Low density
High hardness and wear resistance, both impingement and frictional modes
Superior thermal shock resistance
Low thermal expansion
Electrical insulator
Good oxidation resistance
Good chemical corrosion resistance
Wear-resistant