标准压电陶瓷材料外文翻译.doc

Standards for Piezoelectric Ceramic Materials This document details some of the standards related activities for piezoelectric materials, mainly bulk ceramic types. Standards related purely to quartz have been omitted, in order to limit the size of the task. The production of standards, particularly international ones, is a long and unrewarding business, and that they ever become standards is a tribute to the persistence of a small number of individuals. Consequently the existence or not of a standard in a particular area is not solely because of the need for such a standard, but is due to the concerted effort of these individuals. Also because of the need to keep documents current, if years after publication of a standard there is nobody prepared to maintain this document then there is a danger it will be withdrawn or cancelled. This situation is reflected in the piezoelectric materials standards area, where there are strong groups in Europe (CENELEC) and America (IEEE-UFFC), but some of the most quoted standards have recently been withdrawn ( IEEE 176-1987, IEEE 180-1986, MIL-STD 1376B (SH)). Standards organisations with Piezoelectric related standards CENELEC CENELEC is the European Committee for Electrotechnical Standardization and It has been officially recognised as the European Standards Organisation in its field by the European Commission in Directive 83/189/EEC. A comprehensive series of piezoelectric standards are being developed for CENELEC under BTTF 63-2. There are two working groups in this committee and it is WG-2 that is producing standards related to piezoelectric materials, under the stewardship of Wanda Wolny. At the time of writing the first three are close to being approved by the various national committees. As with most standards within CENELEC there are English, French and German versions of these standards. prEN 50324-1:2001 Piezoelectric properties of ceramic materials and components - Part 1: Definitions and Classifications This standar