Overview
IEC TS 61994-4-2:2011 is a technical specification published by the International Electrotechnical Commission (IEC). It is part of the IEC 61994 series and provides a comprehensive glossary of terms and definitions for piezoelectric ceramics. These ceramics are widely used in frequency control, selection, and detection devices due to their unique piezoelectric and dielectric properties. The document was prepared by IEC Technical Committee 49, aiming for international consistency in terminology relevant to piezoelectric and dielectric materials.
This second edition incorporates key updates, including revised definitions, systematically organized terminology, and illustrations to clarify vibration modes in piezoelectric ceramics. These improvements support greater understanding and accuracy in the field of frequency control technology.
Key Topics
- Standardized Definitions: Provides clear meanings for core terms such as piezoelectric effect, piezoelectric ceramics, coupling coefficient, Curie temperature, and permittivity.
- Piezoelectric Ceramics: Describes ceramics with high dielectric constants that exhibit piezoelectricity upon polarization, essential for modern electronic components.
- Vibration Modes: Clarifies various vibration modes - such as flexural, expansion, length, and trapped vibration - through terminology and supporting diagrams.
- Ferroelectric Properties: Includes terms related to ferroelectric materials and their behavior, including spontaneous polarization, remanent polarization, aging, and poling.
- Measurement Parameters: Explains technical properties like bulk acoustic waves, frequency constant, electric polarization, and insulation resistance.
- Reversible Effects: Defines the direct and reverse piezoelectric effects, highlighting the importance of energy conversion between electrical and mechanical domains.
Applications
The standardized terminology of IEC TS 61994-4-2:2011 is essential in various sectors of the electronics and materials industry. Key applications include:
- Design and Manufacturing: Ensures clarity in communication for those designing and producing piezoelectric ceramics and devices, minimizing misinterpretation and errors.
- Testing and Quality Assurance: Allows laboratories and certification bodies to apply consistent criteria in performance measurement and compliance assessment.
- Product Documentation: Provides a reference for writing clear technical documentation, datasheets, and manuals for frequency control components.
- Education and Training: Serves as an authoritative glossary for universities and training programs focused on materials science and electrical engineering.
- Research and Development: Facilitates innovation by harmonizing terminology used in academic publications and patents related to piezoelectric and dielectric materials.
- International Trade: Supports global trade by reducing barriers associated with language and definition discrepancies in technical specifications.
Related Standards
Several related IEC standards offer further guidance for those working with piezoelectric, dielectric, and electrostatic devices:
- IEC 60050-121 - International Electrotechnical Vocabulary (IEV) - Electromagnetism
- IEC 60050-151 - International Electrotechnical Vocabulary (IEV) - Electrical and Magnetic Devices
- IEC 60368-2-2 - Piezoelectric Filters - Guide to the use of piezoelectric ceramic filters
- IEC 60642-2 - Piezoelectric Ceramic Resonator Units - Guide to the use of piezoelectric ceramic resonator units
These documents, along with IEC TS 61994-4-2, provide a robust foundation for professionals seeking to ensure consistency, reliability, and interoperability in frequency control and detection technologies. By applying these international standards, manufacturers and engineers can enhance product quality, facilitate market access, and contribute to the advancement of electronic materials science.