【国外标准】 Standard Test Methods for Vitrified Ceramic Materials for Electrical Applications

3.1 For any given ceramic composition, one or more of the properties covered herein may be of more importance for a given insulating application than the other properties. Thus, it may be appropriate that selected properties be specified for testing these ceramic materials.3.2 Pertinent statements of the significance of individual properties may be found in the sections pertaining to such properties.1.1 These test methods outline procedures for testing samples of vitrified ceramic materials that are to be used as electrical insulation. Where specified limits are mentioned herein, they shall not be interpreted as specification limits for completed insulators.1.2 These test methods are intended to apply to unglazed specimens, but they may be equally suited for testing glazed specimens. The report section shall indicate whether glazed or unglazed specimens were tested.1.3 The test methods appear as follows:Section Test Method RelatedStandard(s)6      Compressive Strength      C77313      Dielectric Strength      D618, D1498      Elastic Properties      C62315      Electrical Resistivity      D618, D257, D18297      Flexural Strength      C674, F4179      Hardness      C730, E185      Porosity      C37314      Relative Permittivity and Dissipation          Factor      D150, D2149, D25204      Specific Gravity      C20, C329, F7710      Thermal Conductivity      C177, C40812      Thermal Expansion      C539, E28811      Thermal Shock Resistance  1.4 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. Specific warning statements are given in 11.3, 13.5, and 15.3.1.5 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.