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What role does ceramic material play in aerospace?

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With the development of society, the advancement of industry, the advancement of technology, the PCB industry is also getting better and better, and the craft function is more and more sophisticated. Whether it is a hard board or a soft board, it is still a combination of soft and hard, or the best ceramic substrate with heat dissipation. We are telling us that innovation is limitless!
Ceramic materials are especially useful for highly secure electronic use. In the 19th century, the use of ceramic materials was the norm for isolators and bulb sockets, as well as the high-skilled use of ceramics in radio tubes, pre-stage pacemakers, and military electronics that were widely used in the 1930s.
Since then, ever-increasing production skills have now incredibly increased the material category from ordinary materials to new blends and nano-skills to the level of today's skill ceramics.
Function and material
Compared with the previous standard ceramic materials, the durability, laziness and chemical properties of the new process ceramics have been improved. Even the physical properties have undergone various changes. For example, they are not as easy to break as they used to be - a common problem in the use of ceramics. In most applications, particularly in aerospace applications, ceramics have a variety of uses as suitable material systems for printed circuit boards.
The great advantage of ceramic materials is their thermomechanical function. Its thermal properties include expansion coefficient, thermal conductivity, heat capacity, aging under the influence of thermal cycling, and the ability to accept higher temperatures. These characteristics are beneficial for electronic use, especially aerospace. For example, unlike polymers and epoxy resins, ceramic materials do not exhibit decomposition, and their chemical bonds are not cracked by heat and ultraviolet radiation as compared to other materials such as organics. In addition, ceramics do not vent gases in extreme vacuum in deep spaces.

Function


ceramic substrates


Alumina (Al203) is a cost-effective ceramic material and a commonly used ceramic material. It has a higher thermal conductivity than a metal PCB.
Aluminum nitride (AlN) also provides excellent thermal conductivity, and the cost of raw materials is much higher, and is usually only planned in highly skilled products.
Some of the advantageous properties of ceramic materials for aerospace electronics include:
Thermal expansion coefficient - very close to silicon, much lower than most common metals.
Excellent electrical isolation - long life even at long temperatures.
As an insulator, it has excellent thermal conductivity - which is good for heat diffusion.
Stable dielectric properties and low losses at high frequencies.
It is chemically stable relative to many chemicals, moisture, solvents and consumables.
The aging due to the consistency of the material is very slow.
Compatibility with precious metal paste sintering skills - resulting in highly reliable conductors.
High processing temperature - away from normal operating range.
Thermal resistance: There is no typical melting, decomposition or softening.
Mechanical Stiffness - A sensor that allows rigid carriers, hardness and wear resistance to operate in vacuum, fluid and industrial contaminated environments.
Anti-EUV, plasma and ionizing radiation, and almost no deflation in high vacuum, is ideal for sensors used in EUV semiconductor devices.
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