1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPiezoelectric, dielectric and electrostatic devices and associated materials for frequency control, selection and detection GlossaryPart 4-2: Piezoelectric and dielectric materia
2、ls Piezoelectric ceramicsDD IEC/TS 61994-4-2:2011National forewordThis Draft for Development is the UK implementation of IEC/TS 61994-4-2:2011. It supersedes DD IEC/TS 61994-4-2:2003 which is withdrawn.This publication is not to be regarded as a British Standard. It is being issued in the Draft for
3、Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained.Comments arising from the use of this Draft for Development are requested so that UK experience can be re
4、ported to the international organization responsible for its conversion to an international standard. A review of this publication will be initiated not later than 3 years after its publication by the international organization so that a decision can be taken on its status. Notification of the start
5、 of the review period will be made in an announcement in the appropriate issue of Update Standards.According to the replies received by the end of the review period,the responsible BSI Committee will decide whether to support theconversion into an international Standard, to extend the life of theTec
6、hnical Specification or to withdraw it. Comments should be sentto the Secretary of the responsible BSI Technical Committee at BritishStandards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted to Technical Committee EPL/49, Piezoelectric devices for f
7、requency control and selection.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011ISBN 978 0 580 67407 5
8、ICS 01.040.31; 31.140Compliance with a British Standard cannot confer immunity from legal obligations.This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 30 April 2011.Amendments issued since publicationAmd. No. Date Text affectedDRAFT FOR D
9、EVELOPMENTDD IEC/TS 61994-4-2:2011IEC/TS 61994-4-2 Edition 2.0 2011-03 TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control, selection and detection Glossary Part 4-2: Piezoelectric and dielectric materials
10、Piezoelectric ceramics Dispositifs pizolectriques, dilectriques et lectrostatiques et matriaux associs pour la commande, le choix et la dtection de la frquence Glossaire Partie 4-2 : Matriaux pizolectriques et dilectriques Cramiques pizolectriques INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION
11、 ELECTROTECHNIQUE INTERNATIONALE H ICS 01.040.31; 31.140 PRICE CODE CODE PRIX ISBN 978-2-88912-374-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale DD IEC/TS 61994-4-2:2011 2 TS 61994-4-2 IEC:2011 INTERNATIONAL ELEC
12、TROTECHNICAL COMMISSION _ PIEZOELECTRIC, DIELECTRIC AND ELECTROSTATIC DEVICES AND ASSOCIATED MATERIALS FOR FREQUENCY CONTROL, SELECTION AND DETECTION GLOSSARY Part 4-2: Piezoelectric and dielectric materials Piezoelectric ceramics FOREWORD 1) The International Electrotechnical Commission (IEC) is a
13、worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to oth
14、er activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the
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16、 determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National
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18、which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publ
19、ication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is
20、 not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its tec
21、hnical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IE
22、C Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subj
23、ect of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. In exceptional circumstances, a technical committee may propose the publication of a technical specification when th
24、e required support cannot be obtained for the publication of an International Standard, despite repeated efforts, or the subject is still under technical development or where, for any other reason, there is the future but no immediate possibility of an agreement on an International Standard. Technic
25、al specifications are subject to review within three years of publication to decide whether they can be transformed into International Standards. DD IEC/TS 61994-4-2:2011TS 61994-4-2 IEC:2011 3 IEC 61994-4-2, which is a technical specification, has been prepared by IEC technical committee 49: Piezoe
26、lectric, dielectric and electrostatic devices and associated materials for frequency control, selection and detection. This second edition of IEC 61994-4-2 cancels and replaces the first edition published in 2003 This edition constitutes a technical revision. The main changes with respect to the pre
27、vious edition are : definitions updated; terminology given in orderly sequence; drawing inserted for easier understanding the vibration modes. The text of this technical specification is based on the following documents: Enquiry draft Report on voting 49/924/DTS 49/932/RVC Full information on the vo
28、ting for the approval of this technical specification can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 61994 under the general title 1 : Piezoelectric, dielectric and ele
29、ctrostatic devices and associated materials for frequency control, selection and detection Glossary can be found on the IEC website. Future standards in this series will carry the new general title as cited above. Titles of existing standards in this series will be updated at the time of the next ed
30、ition. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be transformed into an International s
31、tandard, reconfirmed, withdrawn, replaced by a revised edition, or amended. 1The general title is changed from Piezoelectric and dielectric devices for frequency control and selection Glossary: to this title based on the change of the title of TC49 in 2009. DD IEC/TS 61994-4-2:2011 4 TS 61994-4-2 IE
32、C:2011 PIEZOELECTRIC, DIELECTRIC AND ELECTROSTATIC DEVICES AND ASSOCIATED MATERIALS FOR FREQUENCY CONTROL, SELECTION AND DETECTION GLOSSARY Part 4-2: Piezoelectric and dielectric materials Piezoelectric ceramics 1 Scope This part of IEC 61994 specifies the terms and definitions for piezoelectric cer
33、amics representing the present state-of-the-art, which are intended for use in the standards and documents of IEC technical committee 49. 2 Normative references Void 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 aging irreversible changes w
34、ith time in the properties of the material 3.2 bulk acoustic wave elastic wave propagating in solid material such as piezoelectric ceramics 3.3 coupling coefficient the coupling coefficient(electro-mechanical coupling coefficient) is a constant representing the piezoelectric efficiency of a piezoele
35、ctric ceramic. More specifically, it represents the efficiency of converting electrical energy into mechanical energy, and it is defined as the square root of the ratio of mechanical energy exited to electrical energy transferred. transferred energy electricalexcited energy mechanical=k3.4 Curie tem
36、perature temperature at which a ferroelectric material undergoes a structural phase transition to a state where a spontaneous polarisation vanishes 3.5 electric polarisation Pat a given point within a domain of quasi-infinitesimal volume V, vector quantity equal to the electric dipole moment p of th
37、e substance contained within the domain divided by the volume, V DD IEC/TS 61994-4-2:2011TS 61994-4-2 IEC:2011 5 P = p / V NOTE The electric polarization P satisfies the relation P ED +=0where D is the electric flux density; E is the electric field strength and 0 is the dielectric constant in free s
38、pace. IEC 60050-121: 1998, 121-11-37 3.6 expansion vibration vibration mode of a disc or plate where the displacement is in the plane surface (see Figure 1) 3.7 ferroelectric material material that exhibits, over some range of temperature, a spontaneous electric polarization that can be reversed or
39、reoriented by application of an electric field 3.8 flexural vibration for a resonator shaped as a thin narrow bar, displacements appearing in a direction perpendicular to the length of the bar (see Figure 1) 3.9 frequency constant product of the resonance frequency and the vibrating piece dimension
40、which determines the resonance frequency. NOTE For fundamental mode the frequency constant equals to the velocity of an acoustic wave. 3.10 insulation resistance resistance under specified conditions between two conductive elements separated by insulating materials IEC 60050-151: 2001,151-15-43 3.11
41、 length vibration for a resonator shaped as a thin and narrow bar, the dominant deformation which appears only along the longitudinal axis (see Figure 1) 3.12 (absolute) permittivity scalar or tensor quantity the product of which by the electric field strength E in a medium is equal to the electric
42、flux density D : E D =NOTE For an isotropic medium the permittivity is a scalar quantity; for an anisotropic medium it is a tensor quantity. IEC 60050-121: 1998, 121-12-12 DD IEC/TS 61994-4-2:2011 6 TS 61994-4-2 IEC:2011 3.13 piezoelectric ceramics ceramics with a high dielectric constant which are
43、given piezoelectricity by polarising property. 3.14 piezoelectric effect piezoelectricity is the ability to generate an electric field in response to applied mechanical stress. The piezoelectric effect is reversible in that materials exhibiting the direct piezoelectric effect (the production of an e
44、lectric field when stress is applied) also exhibit the reverse piezoelectric effect (the production of stress and/or strain when an electric field is applied). IEC 60050-121: 1998, 121-12-86, modified 3.15 poling process by which a d.c. electric field exceeding the coercive field is applied to a mul
45、ti-domain ferroelectric to produce a net remanent polarisation 3.16 remanent polarisation polarisation electric that remains after an applied electric field is removed 3.17 spontaneous polarization electric polarization within a single ferroelectric domain 3.18 trapped vibration mode vibration mode
46、the wave energy of which is trapped in the electrode region on the piezoelectric ceramic resonator shaped as a thin plate and vibrating in a thickness mode (see Figure 1) DD IEC/TS 61994-4-2:2011TS 61994-4-2 IEC:2011 7 Frequency Vibrating mode Flextural vibration Length vibration Expansion vibration
47、 Trapped vibration Signifies the direction of the vibration 1 k 10 k 100 k 1 M 10 M 100 M 1 G Metallic electrodes u Conventional resonator geometry and amplitude distributionu Resonator plate substrate (the “blank”) IEC 397/11 Figure 1 Vibrating modes and their application frequencies DD IEC/TS 6199
48、4-4-2:2011 8 TS 61994-4-2 IEC:2011 Bibliography IEC 60050-121: 1998, International Electrotechnical Vocabulary (IEV) Chapter 121: Electromagnetism IEC 60050-151: 2001, International Electrotechnical Vocabulary (IEV) Chapter 151: Electrical and magnetic devices IEC 60368-2-2:1996, Piezoelectric filte
49、rs Part2: Guide to the use of piezoelectric filters Section2: Piezoelectric ceramic filters IEC 60642-2:1994, Piezoelectric ceramic resonator units Part2: Guide to the use of piezoelectric ceramic resonator units _ DD IEC/TS 61994-4-2:2011This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publications, informatio
