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.

Pertinent statements of the significance of individual properties may be found in the sections pertaining to such properties.

1. Scope

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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C20 Test Methods for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and Shapes by Boiling Water

C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus

C329 Test Method for Specific Gravity of Fired Ceramic Whiteware Materials

C373 Test Method for Water Absorption, Bulk Density, Apparent Porosity, and Apparent Specific Gravity of Fired Whiteware Products

C408 Test Method for Thermal Conductivity of Whiteware Ceramics

C539 Test Method for Linear Thermal Expansion of Porcelain Enamel and Glaze Frits and Ceramic Whiteware Materials by Interferometric Method

C623 Test Method for Youngs Modulus, Shear Modulus, and Poissons Ratio for Glass and Glass-Ceramics by Resonance

C674 Test Methods for Flexural Properties of Ceramic Whiteware Materials

C730 Test Method for Knoop Indentation Hardness of Glass

C773 Test Method for Compressive (Crushing) Strength of Fired Whiteware Materials

D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation

D257 Test Methods for DC Resistance or Conductance of Insulating Materials

D618 Practice for Conditioning Plastics for Testing

D638 Test Method for Tensile Properties of Plastics

D1829 Test Method for Electrical Resistance of Ceramic Materials at Elevated Temperatures

D2149 Test Method for Permittivity (Dielectric Constant) And Dissipation Factor Of Solid Dielectrics At Frequencies To 10 MHz And Temperatures To 500C

D2520 Test Methods for Complex Permittivity (Dielectric Constant) of Solid Electrical Insulating Materials at Microwave Frequencies and Temperatures to 1650C

E18 Test Methods for Rockwell Hardness of Metallic Materials

E288 Specification for Laboratory Glass Volumetric Flasks

F77 Test Method for Apparent Density of Ceramics for Electron Device and Semiconductor Application

F417 Test Method for Flexural Strength (Modulus of Rupture) of Electronic-Grade Ceramics

Keywords

ceramic electrical insulation; electrical insulation; electrical resistivity; porcelain; porosity; thermal conductivity; thermal expansion; vitrified ceramics; Dye penetrant inspection; Ceramic electrical/electronic devices/applications; Electrical insulating materials; Pore volume; Porosity; Thermal shock materials/testing; Vitrified ceramic materials;

ICS Code

ICS Number Code 81.040.30 (Glass products); 81.060.01 (Ceramics in general)

Citing ASTM Standards

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