1、Designation: C545 97 (Reapproved 2018)Standard Classification ofZircon Refractories1This standard is issued under the fixed designation C545; 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 pa
2、rentheses indicates the year of last reapproval. Asuperscript epsilon () 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, not
3、less than 60 % zirconiumoxide (ZrO2) and not less than 30 % silica (SiO2).1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This in
4、ternational standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT
5、) Committee.2. Referenced Documents2.1 ASTM Standards:2C20 Test Methods for Apparent Porosity, Water Absorption,Apparent Specific Gravity, and Bulk Density of BurnedRefractory Brick and Shapes by Boiling WaterC830 Test Methods for Apparent Porosity, LiquidAbsorption, Apparent Specific Gravity, and B
6、ulk Densityof Refractory Shapes by Vacuum PressureNOTE 1Chemical analysis of refractory products is determined by acombination of X-ray fluorescence (XRF) and inductively coupled plasma(ICP) using standard reference materials (SRM), including various typesof minerals and refractory materials which a
7、re available from the NationalInstitute of Standards and Technology and other appropriate sources.3. Significance and Use3.1 The zircon content and bulk density of a zirconia-silicarefractory material have important influences on chemicalresistance and its satisfactory use in refractory applications
8、.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).4.1.2 Type B (Dense)Zircon refractories having a bulkdensity of 240 lb/ft3
9、(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 C20 or C830.5.1.2 Chemical AnalysisXRF and ICP.6. Retests6.1 Because of variables resulting from sampling and thelack of satisfactory r
10、eproducibility 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 to the requirements prescribed in thisclassification. The final resul
11、ts 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-silica1This classification is under the jurisdiction of ASTM Committee C08 onRefract
12、ories and is the direct responsibility of Subcommittee C08.92 on The JosephE. Kopanda Subcommittee for Editorial, Terminology, and Classification.Current edition approved Oct. 1, 2018. Published October 2018. Originallyapproved in 1964. Last previous edition approved in 2013 as C545 97 (2013).DOI: 1
13、0.1520/C0545-97R18.2For 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.Copyright ASTM International, 100 Barr Har
14、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendat
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18、ents have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, 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
19、multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 97 (2018)2
