1、Designation: C467 97 (Reapproved 2008)C467 14Standard Classification ofMullite Refractories1This standard is issued under the fixed designation C467; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numb
2、er in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This classification covers refractory products consisting predominantly of mullite (3 Al2O32 SiO2) crystals that are formedby either conver
3、ting any of the sillimanite group of minerals, or synthesizing from appropriate materials in a melt or sinter process.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information on
4、ly and are not considered standard.2. Referenced Documents2.1 ASTM Standards:2C16 Test Method for Load Testing Refractory Shapes at High TemperaturesNOTE 1Chemical analysis of refractory products are determined by a combination of x-ray fluorscence (XRF) and inductively coupled plazma (ICP)using sta
5、ndard reference materials (SRM), including various types of minerals and refractory materials which are available from the National Instituteof Standards and Technology and other appropriate sources.C832 Test Method of Measuring Thermal Expansion and Creep of Refractories Under Load3. Significance a
6、nd Use3.1 The mullite content of an alumina-silica refractory material has an important influence on volume stability, load bearingproperties, and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications andquality control.4. Properties Ba
7、sis of Classification4.1 The refractory products falling within the scope of this classification are classified by chemical and physical tests to meetthe following requirements:Alumina content, %Impurities,A max, %Deformation,B max, %56 to 7955A Impurities refer to metal oxides other than those of a
8、luminum and silicon.B When tested in accordance with 6.1.2.5. Test Specimens5.1 Testing for compliance with this classification shall be performed on 9 by 412 by 212-in. (228 by 114 by 64-mm) rectangularbrick as made, or on specimens of this size cut from larger shapes, utilizing existing plane surf
9、aces as much as possible.6. Test Methods6.1 The properties enumerated in this classification shall be determined in accordance with the following ASTM meth-ods:6.1.1 Alumina ContentXRF and ICP.6.1.2 Load TestSchedule 6 of Table 1 in Test Method C16.6.1.3 Thermal Expansion and CreepMethod C832.1 This
10、 classification is under the jurisdiction of the ASTM Committee C08 on Refractories and is the direct responsibility of Subcommittee C08.92 on The Joseph E.Kopanda Subcommittee for Editorial, Terminology and Classification.Current edition approved Aug. 1, 2008Sept. 1, 2014. Published September 2008O
11、ctober 2014. Originally approved in 1961. Last previous edition approved in 20022008as C467 97 (2002).(2008). DOI: 10.1520/C0467-97R08.10.1520/C0467-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Sta
12、ndardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possibl
13、e to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West
14、Conshohocken, PA 19428-2959. United States17. Retests7.1 Because of possible variables that may result from sampling or an unsatisfactory reproducibility of tests by differentlaboratories, the material may be resampled and retested at the request of either the manufacturer or the purchaser. This cou
15、ld applywhere the first test results may not conform to the requirements prescribed in this classification. Therefore, the final results to beused shall be the average of at least two series of tests, each of which has been obtained by following the specified testingprocedures in detail.8. Keywords8
16、1 alumino-silicate; classification; mullite; refractoriesASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such pate
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