1、Designation: F 105 72 (Reapproved 2005)Standard Specification forType 58 Borosilicate Sealing Glass1This standard is issued under the fixed designation F 105; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers Type 58 borosilicate sealingglass for use in electronic applications.NOTE 1This specification is primar
3、ily intended to consider glass asmost generally used, that is, glass in its transparent form as normallyencountered in fabricating electronic devices. X1.3 refers to a sealingalloy that is compatible with this glass. Type 58 glass in other forms suchas powdered, crushed, sintered, fibrous, etc., are
4、 excluded. The require-ments of this specification, as applied to these forms, must be establishedin the raw glass prior to its conversion.2. Referenced Documents2.1 ASTM Standards:2C 336 Test Method for Annealing Point and Strain Point ofGlass by Fiber ElongationC 338 Test Method for Softening Poin
5、t of GlassC 598 Test Method for Annealing Point and Strain Point ofGlass by Beam BendingD 150 Test Methods for AC Loss Characteristics and Per-mittivity (Dielectric Constant) of Solid Electrical Insulat-ing MaterialsD 257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsE29 Practi
6、ce for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 228 Test Method for Linear Thermal Expansion of SolidMaterials With a Vitreous Silica Dilatometer3F14 Practice for Making and Testing Reference Glass-Metal Bead-SealF15 Specification for Iron-Nickel-Cobalt Seal
7、ing AlloyF 140 Practice for Making Reference Glass-Metal ButtSeals and Testing for Expansion Characteristics by Polari-metric MethodsF 144 Practice for Making Reference Glass-Metal Sand-wich Seal and Testing for Expansion Characteristics byPolarimetric Methods3. Ordering Information3.1 Orders for ma
8、terial under this specification shall includethe following information:3.1.1 Form,3.1.2 Type of glass,3.1.3 Dimensions,3.1.4 Marking and packaging, and3.1.5 Certification (if required).4. Chemical Composition4.1 The typical chemical composition of this glass is asfollows (Note 2):Weight %Major Const
9、ituents:Silica (SiO2) 65.0Alumina (Al2O3)7.5Boron oxide (B2O3) 18.0Soda (Na2O) 2.0Potash (K2O) 3.0Barium oxide (BaO) 3.0Minor Constituents:Lithium oxide (Li2O) 0.6Fluorine (F) 0.6, maxReducible oxides (Note 3) 0.05, maxNOTE 2Major constituents may be adjusted to give the desiredelectrical and physic
10、al properties to the glass. However, no change shall bemade that alters any of these properties without due notification of, andapproval by, the user.NOTE 3Total of arsenic trioxide (As2O3), antimony trioxide (Sb2O3),and lead oxide (PbO).5. Physical Requirements5.1 The material shall conform to the
11、physical propertiesprescribed in Table 1. For electrical properties see Table 2, andits Footnote A.1This specification is under the jurisdiction of ASTM Committee C14 on Glassand Glass Products and is the direct responsibility of Subcommittee C14.04 onPhysical and Mechanical Properties.Current editi
12、on approved Sept. 1, 2005. Published October 2005. Originallyapproved in 1968. Last previous edition approved in 2000 as F 105 72 (2000).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
13、nformation, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Finish and Workmanship6.1 The glass shall have a finish that ensures smooth, evensurfaces and f
14、reedom from cracks, checks, bubbles, and otherflaws of a character detrimental to the strength or life of thecomponent or device for which its use is intended.7. Test Methods7.1 Softening PointTest Method C 338.7.2 Annealing PointTest Method C 336 and Test MethodC 598.7.3 Thermal Expansion Coeffcien
15、t Pretreat the specimenby heating to 10C above the annealing point and hold it at thattemperature for 15 min; then cool it from that temperature to100C at a rate of 2 to 5C/min. The cooling rate below 100Cis optional. Place the specimen in the dilatometer and deter-mine the mean coefficient of linea
16、r thermal expansion for the 0to 300C range in accordance with ProcedureAof Test MethodE 228.7.4 Contraction CoeffcientHeat the specimen in a vitre-ous silica dilatometer to 20C above the annealing point andhold it at that temperature for 15 min; then cool at a rate offrom 1.0 to 1.5C/min to a temper
17、ature below 200C. The rateof cooling from the point below 200 to 100C shall not exceed5C/min. The rate of cooling from 100C to room temperatureis optional. During this cooling schedule, determine the ther-mal contraction curve and calculate the mean coefficient oflinear thermal contraction between a
18、 point 15C below theannealing point and 30C in accordance with Procedure B ofTest Method E 228.7.5 Bead Seal TestThe thermal contraction match be-tween the glass and a sealing alloy may be determined bypreparing and testing an assembly in accordance with PracticeF14, Practice F 140, or Practice F 14
19、4.8. Test Results8.1 Observed or calculated values obtained from measure-ments, tests, or analysis shall be rounded in accordance withthe rounding method of Practice E29, to the nearest unit in thelast right-hand place of figures used in expressing the specifiedlimit.9. Packaging and Marking9.1 Pack
20、aging shall be determined by the form in which thismaterial shall be supplied and shall be subject to agreementbetween the manufacturer and the purchaser.9.2 The material as furnished under this specification shallbe identified by the name or symbol of the manufacturer. Thelot size for determining c
21、ompliance with the requirements ofthis specification shall be one days production.10. Investigation of Claims10.1 Where any material fails to meet the requirements ofthis specification, the material so designated shall be handled inaccordance with the agreement mutually acceptable to themanufacturer
22、 and the purchaser.TABLE 1 Physical RequirementsProperty ASTM Test MethodACondition ValueSoftening point C 338 see 7.1 715 6 10CAnnealing point C 336 or C 598 see 7.2 480 6 10CThermal expansion coefficient E 228 see 7.30 to 300C4.65 6 0.20 ppm/CContraction coefficient E 228 see 7.4(annealing point m
23、inus 15 to 30C)5.8 6 0.20 ppm/CATest methods and conditions are detailed in the appropriately referenced section of this specification.TABLE 2 Electrical PropertiesAPropertyASTM TestMethodCondition,CTypical ValueVolume resistivity (dc) D 257 25 log R (Vcm)17.0250 log R (Vcm)9.1350 log R (Vcm)7.3Diel
24、ectric constant (1 MHz) D 150 20 5.0Dissipation factor (1 MHz) D 150 20 0.0027Loss index (1 MHz) D 150 20 0.014AWhile having no influence on the sealing capability of the glass, electricalproperties are included as information pertaining to the effect of the material on theperformance of electronic
25、devices in which it may be used.F 105 72 (2005)2APPENDIX(Nonmandatory Information)X1. ADDITIONAL INFORMATIONX1.1 Physical PropertiesThe physical properties listed inTable X1.1, in addition to those included as requirements of thespecification, are presented for guidance in negotiating with aspecific
26、 vendor for their imposition when particularly appro-priate. These criteria are not included within the specificationbecause their values are averages of results obtained by variousmethods, no one of which is presently agreed upon by the glassindustry as a whole.X1.2 Typical Values for the Mean Coef
27、fcient of LinearThermal ContractionTypical values for the mean coefficientof linear thermal contraction of Type 58 borosilicate glass aregiven in Table X1.2 for information only. These apply to aspecimen of the glass when cooled during the thermal contrac-tion test (see 7.4) from a point above the m
28、aximum tempera-ture shown to 30C at a rate not exceeding 1.5C/min.X1.3 Compatible Metals and Sealing AlloysThe thermalexpansion characteristics of Type 58 sealing glass are generallysatisfactory for sealing to the alloy covered by SpecificationF15, (nominal composition: 29 % nickel, 17 % cobalt, and
29、 53% iron).ASTM 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 patent rights, and the riskof infringement of such
30、rights, are entirely 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 additio
31、nal standardsand should 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 A
32、STM 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 ab
33、oveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE X1.1 Physical PropertiesProperty Condition Unit Value ToleranceDensity . g/cm32.27 60.02Refractive index Sodium D Line . 1.48 60.02Birefringence con- . 1012Pa13.8 60.2stant or stress-optical coefficientTABLE X1.2 Typical Contraction CoefficientsTemperature Range, CMean Contraction Coefficient,m/m C or ppm/C100 to 30 4.5200 to 30 4.6300 to 30 4.7400 to 30 4.9420 to 30 5.0450 to 30 5.5480 to 30 6.2F 105 72 (2005)3
