1.1 本试验方法使用热机械分析技术确定固体材料的线性热膨胀技术系数。 1.2 该试验方法适用于在试验温度范围内表现出足够刚度的固体材料，从而使传感探针不会对试样产生压痕。 1.3 用该试验方法测量的线热膨胀系数的推荐下限为5μm/（m·°C）。该试验方法可在较低（或负）膨胀水平下使用，但精度和精确度会降低（见第节 12 ). 1.4 此测试方法适用于−120°C至900°C的温度范围。温度范围可根据所使用的仪器和校准材料进行扩展。 1.5 国际单位制是标准单位。本标准不包括其他计量单位。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 例如，线性热膨胀系数用于设计目的，并用于确定当由两种不同材料组成的固体受到温度变化时是否会发生热应力失效。 5.2 该试验方法与试验方法相当 D3386 用于测试电绝缘材料，但它涵盖了一组更通用的固体材料，并更具体地定义了测试条件。本试验方法使用的试样较小，仪器与试验方法大不相同 E228 和 D696 . 5.3 此测试方法可用于研究、规范验收、法规遵从性和质量保证。

1.1 This test method determines the technical coefficient of linear thermal expansion of solid materials using thermomechanical analysis techniques. 1.2 This test method is applicable to solid materials that exhibit sufficient rigidity over the test temperature range such that the sensing probe does not produce indentation of the specimen. 1.3 The recommended lower limit of coefficient of linear thermal expansion measured with this test method is 5 μm/(m·°C). The test method may be used at lower (or negative) expansion levels with decreased accuracy and precision (see Section 12 ). 1.4 This test method is applicable to the temperature range from −120 °C to 900 °C. The temperature range may be extended depending upon the instrumentation and calibration materials used. 1.5 SI units are the standard. No other units of measurement are included in this standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Coefficients of linear thermal expansion are used, for example, for design purposes and to determine if failure by thermal stress may occur when a solid body composed of two different materials is subjected to temperature variations. 5.2 This test method is comparable to Test Method D3386 for testing electrical insulation materials, but it covers a more general group of solid materials and it defines test conditions more specifically. This test method uses a smaller specimen and substantially different apparatus than Test Methods E228 and D696 . 5.3 This test method may be used in research, specification acceptance, regulatory compliance, and quality assurance.