1、Designation: C 545 97 (Reapproved 2007)Standard Classification ofZircon Refractories1This standard is issued under the fixed designation C 545; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
2、parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This classification covers fired refractory brick andshapes consisting predominantly of zircon (ZrO2SiO2) andcontaining, by chemical analysis, n
3、ot less than 60 % zirconiumoxide (ZrO2) and not less than 30 % silica (SiO2).2. Referenced Documents2.1 ASTM Standards:2C20 Test Methods for Apparent Porosity, Water Absorp-tion, Apparent Specific Gravity, and Bulk Density ofBurned Refractory Brick and Shapes by Boiling WaterNOTE 1Chemical analysis
4、of refractory products are determined by acombination of x-ray fluorescence (XRF) and inductively coupled plazma(ICP) using standard reference materials (SRM), including various typesof minerals and refractory materials which are available from the NationalInstitute of Standards and Technology and o
5、ther appropriate sources.C 830 Test Methods for Apparent Porosity, Liquid Absorp-tion, Apparent Specific Gravity, and Bulk Density ofRefractory Shapes by Vacuum Pressure3. Significance and Use3.1 The zircon content and bulk density of a zirconia-silicarefractory material have important influences on
6、 chemicalresistance and its satisfactory use in refractory applications.This classification is considered useful for purchase specifica-tions and quality control.4. Basis of Classification4.1 Types:4.1.1 Type A (Regular)Zircon refractories having a bulkdensity of less than 240 lb/ft3(3.84 g/cm3).4.1
7、2 Type B (Dense)Zircon refractories having a bulkdensity of 240 lb/ft3(3.84 g/cm3) or more.5. Test Methods5.1 The properties listed in this classification shall bedetermined by the following ASTM methods:5.1.1 Bulk DensityTest Methods C20orC830.5.1.2 Chemical AnalysisXRF and ICP.6. Retests6.1 Becau
8、se of variables resulting from sampling and thelack of satisfactory reproducibility in tests conducted bydifferent laboratories, the material may be resampled andretested when requested by either the manufacturer or thepurchaser. This may apply in instances when the first testresults do not conform
9、to the requirements prescribed in thisclassification. The final results to be used shall be the averageof at least two sets of results, each of which has been obtainedby following in detail the specified testing procedures.7. Keywords7.1 classification; refractories; zircon; zirconia-silicaASTM Inte
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11、 their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand sho
12、uld be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Sta
13、ndards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610
14、832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).1This classification is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.92 on The JosephE. Kopanda Subcommittee for Editorial
15、 Terminology and ClassificationCurrent edition approved Oct. 1, 2007. Published November 2007. Originallyapproved in 1964. Last previous edition approved in 2002 as C 545 97 (2002).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
