ASTM C372 Test for Linear Thermal Expansion of Porcelain Enamel and Glaze Frits and Fired Ceramic Whiteware Products by Dilatometer Method

ASTM C372 test method is used to determine the linear thermal expansion of premelted frit (porcelain enamel and glaze) a nd ceramic whiteware products by the thermal dilatometer method.... Read More

  • Average 30% Cost
    Savings

  • 100% Confidentiality
    Guarantee

  • Free, No-obligation
    Consultation

  • 100% Customer
    Satisfaction

    TRUSTED BY ENGINEERS FROM

    Scope:

    Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature. In the ASTM C372 test method, the measurement of thermal expansion is used to predict stress within materials under non-uniform temperatures. This test can also be used as an indicator of phase composition or changes in structure.

    Test Procedure:

    In ASTM C372, the test specimen is placed in the furnace. It is allowed to stand until its temperature and furnace temperature become equal. Readings from dial indicators are recorded that show the expansion of the specimen with temperature rise. The furnace is adjusted from time to time to give a heating rate less than 3°C/min. Temperature and expansion readings are recorded as necessary but within the 25°C intervals. 

    The linear thermal expansion of certain ceramics changes abruptly over certain temperature ranges due to crystal transformation. This temperature range is found by measuring at narrower temperature intervals. 

    Video 01: Dilatometer for coefficient of thermal expansion analysis

    Specimen size:

    For ASTM C372, the minimum thickness of the specimen should be 0.2 inches and the maximum cross-sectional area should be 0.45 inches. The ends should be flattened and they should be perpendicular to the axis of the specimen.

    Specimens should be conditioned depending on the history of the specimen. Conditioning should include drying, annealing, or protection against moisture expansion, if necessary.

    Data:

    For ASTM C372, the percentage expansion is plotted directly with automatic recording apparatus or calculated and plotted manually as follows:

    A curve is plotted to show each temperature reading, T, on the horizontal axis versus the corresponding percentage expansion along the vertical axis. 

    The coefficient of thermal expansion, a, is calculated for any temperature range, T1 to T2. 

    Conclusion:

    In the ASTM C372 test method, the measurement of thermal expansion is used to predict stress within materials under non-uniform temperatures. This test can also be used as an indicator of phase composition or changes in structure.

    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

      ddd Just share your testing requirements and leave the rest on us!
      • Quick Turnaround and Hasslefree process
      • Confidentiality Guarantee
      • Free, No-obligation Consultation
      • 100% Customer Satisfaction