1、DRAFT FOR DEVELOPMENT Advanced technical ceramics - Unified method for classification ICs 81 060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW DD ENV 12212 : 1996 BSI DD*ENV L22L2 b - 3b24bb 0536508 50T Amd.No. Date DD ENV 12212 : 1996 Text afected This Draft for Developm
2、ent, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 May 1996 O BSI 1996 Committees responsible for this Draft for Development The preparation of this Draft for Development
3、was entrusted to Technical Committee RPI13, Advanced technical ceramics, upon which the following bodies were represented AEA Technology Auminium Federation British Ceramic Research Ltd. British Industrial Ceramic Manufacturem Association Department of Ti-ade and Industry (National Physical Laborato
4、ry) Flat Glass Manufacturem Association GAMBICA (BEAMA Ltd.) Institute of Rektories Engineers Muustry of Defence Reikctories Association of Great Britain Society of British Aerospace Companies Ltd. University of Manchester The following BSI reference relates to the work on this Draft for Development
5、 Committee reference RPU13 ISBN O 680 26492 6 BSI DD*ENV 12212 96 = 1624667 053650% 446 DD ENV 12212 : 1996 Contents Committees responsible National foreword Page Inside front cover 11 Foreword Text of ENV 12212 2 3 O BSI 1996 i BST DD*ENV 32232 96 U 1624669 0536530 3bB m DD ENV 12212 : 1996 Nationa
6、l foreword This Draft for Development has been prepared by Technical Committee RPI/13 and is the English language version of ENV 12212 : 1995 Advanced technical ceramics - Unified method for classi,fication published by the European Committee for Standardization (CEN). This publication is not to be
7、regarded as a British Standard It is being issued in the Draft for Development series of publications and is of a provisional nature because it is considered that further experience is required in its application before it is converted into a British Standard. It should be applied on this provisiona
8、l basis, so that information and experience of its practical application may be obtained. A review of this prestandard wiU be carried out 2 years after its publication. Submission of comments nom users of this publication is requested. According to the replies received, the responsible BSI committee
9、 wil judge whether to support the conversion into a European Standard, to extend the life of the prestandard or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee RPVl3,389 Chiswick High Road, London W4 4AL, quoting the document reference (DD ENV 12212), t
10、he relevant clause and proposing, where possible, an appropriate revision of the text. NOTE. International and European Standards as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London, W4 4AL. Cross-references Publication referred to EN 623-2 : 1993
11、 ENV 6233 : 1993 ENV 6234 : 1993 ENV 658-1 : 1993 ENV 658-2 : 1993 ENV 6583 : 1992 ENV 658-6 : 1993 ENV 820-1 : 1993 ENV 820-2 : 1992 ENV820-3: 1993 EN 821-1 : 1995 ENV 8213 : 1993 Corresponding British Standard BS EN 623 Advanced technical ceramics -Monolithic ceramics - General and textumlIwopert.
12、ies Part 2 : 1993 Determination of density and porosity DD ENV 623 Advanced technical cemmics - Genercrl and Part 3 : 1993 Determination of gmin size Part 4 : 1994 Determination of su?face roughness DD ENV 658 Advanced technical ceramics - Mechanical pmperties of ceramic composites at room temperatu
13、re - Part 1 1993 Determination of tenSEle strength Part 2 : 1993 Determination of compressive strength Part 3 : 1993 Determination ofjlexuml strength Part 6 : 1993 Determination of shear strength by double-punch shearing DD ENV 820 Advanced technical ceramics - Methods of testing monolithic ceramics
14、 - UzemLOmechanical properties - Part 1 : 1994 Determination ofjlexuml strength at elevated tempemtures Part 2 : 1994 Determinatirm of self-bd defamation Part 3 : 1994 Determination of resistance to i%.ermd shock by water quenching BS EN 82 1 Advanced technical ceramics - Monolithic ceramics - Themz
15、ophysical properties Part 1 : 1995 Determination of Ulemnal expansion DD ENV 821 Advanced technical ceramics - Monolithic ceramics - The?nwphysical properties Part 3 : 1994 Determination of specific heat capacity textumlprqpe?-ti?3 ii O BSI 1996 BS6 DDxENV 32232 96 = 3624bb 0536521 OT4 = DD ENV 1221
16、2 : 1996 ENV 843-1 : 1994) ENV84,3-4: 1994 ENV 10073 : 1993 ENV 10074 : 1994 ENV 1071-3 : 1994 ENV 1071-5 : 1995 ENV 1159-1 : 1993 ENV 1159-2 : 1993 ENV 11593 : 1995 ENV 1389 : 1994 DD ENV 843 Advanced technical ceramics - Monolithic ceramics - Mechanical properties at room temperature Part 1 : 1995
17、2) Detmnimtion ofmral strength Part 4 : 1995 Viclcers, Knoop and RockweU superficial hardness tests DD ENV 1007 Advanced technical ceramics - Ceramic composites -Methods of test for rcnforcemmts Part 3 : 1994 Determhation of filament diameter Part 4 ; 1994 De 1994 Advanced technical ceramics - Ceram
18、ic composites - Physical properties - Detmination of amsity and apparent porosity The Technical Committee has reviewed the provisions of IEC 672-2 and IEC 672-3 to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this Draft for Devel
19、opment. IEC 627-2 and IEC 6273 are being revised and wiii be published as BS EN fN6T2-2 and BS EN 60672-3. ) Superseded by EN 843-1 : 1995. Superseded by BS EN 843-1 : 1995. . O BSI 1996 Ill BSI DD*:ENV 32232 96 Lb24669 0536532 T30 EUROPEAN PRESTANDARD ENV 12212 P - advanced technical ceramic; eleme
20、ntal silicon, other than when it forms an integral component of or precursor for an - elemental germanium and other elemental or compound semi-metallic substances; - traditional ceramics based on clay, including: - - sanitary wares; - floor and wall tiles; - building ceramics (e.g. bricks and pipes)
21、; whitewares (e.g. tableware and fine porcelain); - unshaped and shaped refractories for tonnage applications; This standard does not specifically cover hardmetal (cemented carbide) products or products which are mainly glassy, but the scheme can in principle be extended to cover such products. Its
22、mode of use will be determined by the objective behind its use. It is not the purpose of this standard to define how the scheme shall be used, but examples are given of how it might be used. The user is able to define the coding combination and the levei of detail to suit his particular purpose. Thi
23、s standard provides only a flexible framework within which this might be done. BSI DD*ENV L22L2 96 Lb24669 0536515 74T Page 4 ENV 12212 : 1995 2 Normative references This European Prestandard contains, by dated or undated reference, provisions from other publications. These normative references are
24、cited at the appropriate places in the text and in the publications listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European prestandard only when incorporated in it by amendment or revision. For undated references, the latest
25、edition of the publication referred to applies. EN 623-2 ENV 623-3 ENV 623-4 ENV 658-1 ENV 658-2 ENV 658-3 ENV 658-6 ENV 820-1 ENV 820-2 ENV 820-3 EN 821-1 EN 821-2 Advanced technical ceramics - Monolithic ceramics - General and textural properties - Part 2: Determination of density and porosity Adv
26、anced technical ceramics - Monolithic ceramics - General and textural properties - Pari 3: Determination of grain size Advanced technical ceramics - Monolithic ceramics - General and textural properties - Part 4: Determination of surface roughness Advanced technical ceramics - Composite ceramics - M
27、echanical properties at room temperature - Part 1 : Determination of tensile strength Advanced technical ceramics - Composite ceramics - Mechanical properties at room temperature - Part 2: Determination of compressive strength Advanced technical ceramics - Composite ceramics - Mechanical properties
28、at room temperature - Part 3: Determination of flexural strength Advanced technical ceramics - Composite ceramics - Mechanical properties at room temperature - Part 5: Determination of shear strength by short-span three-point bend tests Advanced technical ceramics - Monolithic ceramics - Thennomecha
29、nical properties - Part 1: Determination of flexural strengh at elevated temperatures Advanced technical ceramics - Monolithic ceramics - Thennomechanical properties - Part 2: Detemination of self-loadd deformation Advanced technical ceramics - Monolithic ceramics - Thennomechanical properties - Par
30、t 3: Water quench thermal shock tests Advanced technical ceramics - Monolithic ceramics - Thermophysical properties - Part 1: Determination of thermal expansion Advanced technical ceramics - Monolithic ceramics - Thermophysical properties - Part 2: Determination of thermal diffusivity BSI DD*EMV 122
31、12 96 E 3624669 0536536 686 Page 5 ENV 12212 : 1995 ENV 821-3 EN 843-1 ENV 843-2 ENV 843-4 ENV 1007-3 ENV 1007-4 ENV 1071-3 ENV 1071-5 ENV 1159-1 ENV 1159-2 ENV 1159-3 ENV 1389 IEC 672-2 IEC 672-3 Advanced technical ceramics - Monolithic ceramics - Thermophysical properties - Part 3: Determination o
32、f specific heat Advanced technical ceramics - Monolithic ceramics - Mechanical properties at room temperature - Part 1: Determination of flexural strength Advanced technical ceramics - Monolithic ceramics - Mechanical properties at room temperature - Part 2: Determination of elastic moduli Advanced
33、technical ceramics - Monolithic ceramics - Mechanical properties at room temperature - Part 4: Determination of hardness Advanced technical ceramics - Composite ceramics - Reinforcements - Part 3: Determination of filament diameter Advanced technical ceramics - Composite ceramics - Reinforcements -
34、Part 4: Determination of filament strength Advanced technical ceramics - ceramic coatings - General properties - Part 3: Determination of coating thickness Advanced technical ceramics - Ceramic coatings - General properties - Part 5: characterisation of microstructure Advanced technical ceramics - C
35、omposite ceramics - Thennophysical properties - Part 1: Determination of thermal expansion Advanced technical ceramics - Composite ceramics - Thermophysical properties - Part 2: Determination of thermal diffisivity Advanced technical ceramics - Composite ceramics - Thermophysical properties - Part 3
36、: Determination of specific heat Advanced technical ceramics - Ceramic composites - Physical properties - Determination of density and apparent porosity Specification for ceramic and glass insulating materials - Part 2: Methods of test Specification for ceramic and glass insulating materials - Part
37、3: Individual ma ter ials BSI DD*ENV 12212 96 Lb24bb9 053b517 512 H Page 6 ENV 12212 : 1995 3 Definitions For the purposes of this prestandard, the following definitions apply : 3.1 advanced technical ceramic: A highly engineered, high performance, predominantly non- metallic, inorganic, ceramic mat
38、erial having specific functional attributes. NOTE : Other terms which in whole or in part cover the scope the above expression are in common use. The above term is the preferred in all circumstances. 3.2 Classification field: A set of categories related to one independent aspect or feature of the cl
39、assification. 3.3 classification element: A single category in a classification field. 3.4 code: An alphanumeric string with a prescribed definition in terms of material attributes. 3.5 coding element: A part of the alphanumeric code from one classification field. 4 Objectives This standard provides
40、 a framework whereby advanced technical ceramic products and materials can be classified for a variety of purposes including commercial statistics, market surveys, materials identification, coding and data bases. The present range of products that is encompassed by the term “advanced technical ceram
41、ics“ or one of its synonyms is enormous in breadth, and complex in chemical character, form and property attributes. Normally there are close interlinks between these factors. It has therefore been impossible to devise a single hierarchical scheme, such as that used in EC 672 for electrotechnical ce
42、ramics for insulators or that in the Harmonised Commodity Description and Coding System for goods or derivatives thereof. The scheme developed and incorporated in this standard is novel in many respects to encompass all foreseen requirements and purposes, and all raw and manufactured materials and a
43、pplications, i.e. it has great flexibility. For these purposes, an adequate classification of the diversity of materials and products in various stages of manufacture may require the linking of chemical composition, form, material properties and applications in any required combination. The scheme d
44、escribed in this standard has the capability of classiQing advanced technical ceramics by any combination of these fields in any sequence for any desired purpose. The fields are described individually in the following sections. Annexes B, C and D provide a coding scheme for each classification field
45、 of the scheme. The user should select from the classification fields those relevant to his requirement, and to place these in a prescribed order. Some possible combinations are described in 6. - ES1 DD*ENV II22II2 96 W 3624669 0536538 Y59 Page 7 ENV 12212: 1995 5 Individual classification fields 5.
46、1 Introduction Since the intention is to provide a capability for classifying any combination of fields in any sequence appropriate to user needs, each field is separately identified by a unique initial letter code: - A = application - C = chemical character - D = property characteristic or data The
47、 form of the product is closely related to chemistry, and is incorporated in the chemistry code. If appropriate, additional classification fields may be added in the same way. In each case these should be identifiable in a coding string by a unique initial letter code. For the purposes of computer r
48、ecognition, a strict sequence of classification elements is not required, but for other purposes, such as manual preparation of trade statistics or material specification, the sequence of classification elements should be chosen and fixed as preferred. In the following description of code structures
49、, the variable characters in the code are used: - X = any appropriate single capital letter coding character - n = any appropriate single numeric coding character 5.2 Classification field for application type The initial character to denote the start of the “application“ string is “A“. This is followed by a three-digit number code as listed in hex B for the application areas. In the list, applications are separated into, initially, a hierarchical series of areas by the principal functions of the product as defined by: - electrical insulation; - electronichonic conduction
