1、Designation: C545 97 (Reapproved 2013)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.2. Referenc
4、ed 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 WaterNOTE 1Chemical analysis of refractory products are determined by acombination of x-ray fluorescence (XRF) and indu
5、ctively 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 other appropriate sources.C830 Test Methods for Apparent Porosity, LiquidAbsorption, Appare
6、nt Specific Gravity, and Bulk Densityof Refractory Shapes by Vacuum Pressure3. 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.This classification i
7、s 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(3.84 g/cm3) or more.5
8、. 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 reproducibility in test
9、s 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 results to be used shall be
10、 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 onRefractories and is the direc
11、t responsibility of Subcommittee C08.92 on The JosephE. Kopanda Subcommittee for Editorial, Terminology and ClassificationCurrent edition approved Sept. 1, 2013. Published September 2013. Originallyapproved in 1964. Last previous edition approved in 2007 as C545 97 (2007).DOI: 10.1520/C0545-97R13.2F
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16、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 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 ASTM website (www.astm.org/COPYRIGHT/).C545 97 (2013)2
