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Abstract
The determination of the thermal expansion coefficient by thermo-mechanical analysis (TMA) is based on the measurement of the original length of the specimen, the expansion difference between the specimen and the holder material (reference material), and the specimen temperature. When the measurment error is considerd, the first possible error is the measurement of the temperature, and the second is in the measurement of the expansion difference. The error in the expansion difference is not significant for high expansion materials, such as polymers, but it is significant for low expansion materials such as ceramics. For material with a low temperature expansion, three corrections are available to reduce measurement errors for improved accuracy in the lineal thermal expansion coefficient determination.
The determination of the thermal expansion coefficient by thermo-mechanical analysis (TMA) is based on the measurement of the original length of the specimen, the expansion difference between the specimen and the holder material (reference material), and the specimen temperature. When the measurment error is considerd, the first possible error is the measurement of the temperature, and the second is in the measurement of the expansion difference. The error in the expansion difference is not significant for high expansion materials, such as polymers, but it is significant for low expansion materials such as ceramics. For material with a low temperature expansion, three corrections are available to reduce measurement errors for improved accuracy in the lineal thermal expansion coefficient determination.
Date
9/1991
9/1991
Author(s)
N Matsumori; J Penn; N Nakamura; Y Teramoto
N Matsumori; J Penn; N Nakamura; Y Teramoto
Page(s)
32-48
32-48
Keyword(s)
thermomechanical analysis; TMA; expansion coefficient; temperature sensor; LVDT; linear variable differential transformer; low expansion material; heating range
thermomechanical analysis; TMA; expansion coefficient; temperature sensor; LVDT; linear variable differential transformer; low expansion material; heating range