What is the electrical insulation performance of Macor machinable ceramics at high temperatures

1、 Introduction to Macor Machinable Ceramics
Macor machinable ceramic is a high-performance microcrystalline glass ceramic material produced by Corning Inc. It combines the dual characteristics of glass and ceramics, inheriting the advantages of traditional ceramics such as high hardness, high wear resistance, and low water absorption, while also possessing glass like processability. This material can be processed using ordinary metal processing tools for turning, milling, drilling, grinding, etc., without the need for special equipment. The processing accuracy can reach ± 0.05mm, and the surface smoothness can be polished to a smoothness of 0.5 µ in.

2、 Electrical insulation performance at high temperatures
（1） High volume resistivity
Macor ceramics have extremely high volume resistivity, ranging from 10 ¹⁴ to 10 ¹⁵ ohms · cm. This characteristic enables it to maintain good electrical insulation performance even in high temperature and humid environments, effectively preventing current leakage and ensuring stable operation of the circuit. For example, Macor ceramics can provide reliable insulation in electrodes and dielectric carriers of electronic devices, avoiding short circuits or performance degradation caused by material conductivity.
（2） High dielectric strength
The dielectric strength of Macor ceramics is as high as 40kV/mm, which can effectively isolate high voltage and prevent current leakage in high temperature environments. This characteristic makes Macor ceramics highly reliable in environments that require high electrical insulation, such as insulation substrates for power electronic modules and battery management systems for electric vehicles. In medical devices such as high-voltage electric knives and MRI equipment, the dielectric strength of Macor ceramics can effectively isolate current, prevent leakage or signal interference.
（3） Low dielectric loss
The dielectric loss of Macor ceramics is only 0.0002, exhibiting low dielectric loss and excellent insulation performance in high voltage and high frequency environments. This makes it have broad application prospects in the fields of microwave and radio frequency. For example, in applications such as semiconductor device substrates and sensors, Macor ceramics can ensure the stability and accuracy of signal transmission.
（4） Stable electrical insulation performance
Macor ceramics can maintain stable electrical insulation performance even at continuous high temperatures up to 800 ° C. Its coefficient of thermal expansion is low, about 2 × 10 ⁻⁶/℃, and it can maintain good dimensional stability under temperature changes, ensuring the normal operation of the system. In addition, Macor ceramics have zero porosity and zero moisture absorption, which can prevent gas adsorption and permeation even in humid or high-pressure environments, providing long-term stability for electronic devices.

3、 Application examples of high-temperature electrical insulation performance
（1） Aerospace field
In the aerospace field, the high-temperature electrical insulation performance of Macor ceramics has been widely applied. For example, in the thermal control system of satellites, Macor ceramics are used as insulation components to withstand high temperatures and complex mechanical loads. Its low thermal expansion coefficient and stable electrical insulation performance ensure the normal operation of the system under extreme temperature changes.
（2） In the field of electronic manufacturing
In the electronic manufacturing process, many process steps need to be carried out in high-temperature environments, such as wafer heat treatment, chemical vapor deposition, etc. The high temperature resistance of Macor ceramics enables them to maintain stable physical and chemical properties in these high-temperature environments, without deformation or performance degradation due to temperature changes. In addition, Macor ceramics are also used to manufacture electrodes and dielectric carriers for electronic devices, providing reliable insulation effects.
（3） In the field of new energy
In the field of new energy vehicles, Macor ceramics are used as insulation brackets for battery modules. With its excellent electrical insulation performance and high-temperature stability, Macor ceramics can maintain stable performance in various harsh environments, effectively preventing short circuits between battery modules and ensuring the safe operation of battery systems. At the same time, its high temperature resistance also enables it to withstand the heat generated during the battery charging and discharging process, thereby extending the battery’s service life.
（4） Medical equipment field
In medical equipment, Macor ceramic insulation rings are becoming an innovator in medical equipment insulation technology due to their zero porosity, biological inertness, and high-temperature sterilization resistance. For example, in implantable neural stimulators, the Macor insulating ring can work stably for more than 10 years without any biocompatibility risks. In scenarios such as high-voltage electric knives and MRI equipment, the dielectric strength of Macor ceramics can effectively isolate current, prevent leakage or signal interference.

Macor machinable ceramics exhibit excellent electrical insulation properties at high temperatures, including high volume resistivity, high dielectric strength, low dielectric loss, and stable electrical insulation performance. These characteristics have made it widely used in various fields such as aerospace, electronic manufacturing, new energy, medical equipment, etc.

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.