Determination of dielectric properties of Al2O3 and AlN ceramics at up to 1000°C and MHz frequencies

Knowledge of properties and performance relationships of ceramic substrates is needed for their advantageous use in packaging and electronic applications. Infinita Lab offers state-of-the-art technology for testing the electrical properties of ceramics at high temperatures and MHz frequencies.

    Infinita Lab network laboratories are well equipped to measure the dielectric properties of ceramics at temperatures (up to 1000 °C) and MHz frequencies. Al2O3 and AlN ceramics have many high-temperature applications at MHz frequencies. For example, polycrystalline Al2O3 and AlN are routinely used in packaging and substrate applications. High purity and stable quality ceramic substrates are crucial in applications like LED packages, the substrate for chip resistors, HIC substrates for heat dissipation, power modules, FAX substrates for thermal printer heads, etc. Conventional testing to evaluate these materials’ electrical properties has a limited temperature range from room temperature to 350 °C. However, testing ceramics at high temperatures and MHz frequencies is crucial to understand their properties and performance relationship but is not currently offered by any lab. 

    Below is an example of the dielectric constant (Figure 1) and the dissipation factor (Figure 2) at varying temperatures and frequencies.

    Fig. 2. Dissipation factor of 96% Al2O3 at various temperatures and frequencies. Reference [1]

    With increased scope for Al2O3 and AlN materials in high-temperature applications, measurement of dielectric properties at high temperatures and MHz frequencies is becoming increasingly important. However, measuring dielectric constant at high temperatures (700 °C) and MHz frequencies is complex and not offered by most laboratories. Infinita Lab provides unconventional electrical testing of these ceramics at temperatures from room temperature to as high as 650 °C using the AC impedance method at the following frequencies: 350 kHz, 15 MHz, 30 MHz. The tangent loss is in the order of 10-4 and negligible to be measured with acceptable accuracy. Infinita Lab partners provide these tests with relative success.Measuring the dielectric properties of polycrystalline Al2O3 and AlN substrates at high temperatures is critical to understanding their temperature dependency.

    [1] Chen, L., & Hunter, G. (2004). Temperature-Dependent Dielectric Properties of Polycrystalline 96%Al2O3. MRS Proceedings, 833, G7.6. doi:10.1557/PROC-833-G7.6

    OUR SERVICES

    Core Materials Testing Services

    Metrology

    A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.

    Metrology Testing Services POPULAR TESTS:

    TEM SIMS Profilometry

    Materials Testing

    ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.

    Materials Testing Services POPULAR TESTS:

    Nondestructive Testing Electrical Testing Chemistry Analysis

    Product Testing

    Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.

    Product Testing Services POPULAR TESTS:

    Vibration Testing Humidity Testing Accelerated Aging

    Looking for Material Testing?

    We have already delivered 10000+ Material Test results to top companies

      Send us a request

        Process for testing
        •  
          STEP 01

          You share material and testing requirements with us

        •  
          STEP 02

          You ship your sample to us or arrange for us to pick it up.

        •  
          STEP 03

          We deliver the test report to your email.

          Let’s work together!

          Share your testing requirements with us and we will be happy to assist you.

          ddd Just share your testing requirements and leave the rest on us!
          • Free, no-obligation consultation
          • Guaranteed confidentiality
          • Quick turnaround time
          • Hassle-free process

            ddd

            Let us combine our capabilities to achieve success!!

              idea icon
              Want to connect with an expert before you leave?