ASTM F105-72(2019)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:F105 −72 (Reapproved 2019)
Standard Specification for
Type 58 Borosilicate Sealing Glass
ThisstandardisissuedunderthefixeddesignationF105;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope F15 Specification for Iron-Nickel-Cobalt Sealing Alloy
F140 Practice for Making Reference Glass-Metal Butt Seals
1.1 This specification covers Type 58 borosilicate sealing
and Testing for Expansion Characteristics by Polarimetric
glass for use in electronic applications.
Methods
NOTE 1—This specification is primarily intended to consider glass as
F144 Practice for Making Reference Glass-Metal Sandwich
most generally used, that is, glass in its transparent form as normally
Seal and Testing for Expansion Characteristics by Polari-
encountered in fabricating electronic devices. X1.3 refers to a sealing
metric Methods
alloy that is compatible with this glass. Type 58 glass in other forms such
as powdered, crushed, sintered, fibrous, etc., are excluded. The require-
3. Ordering Information
ments of this specification, as applied to these forms, must be established
in the raw glass prior to its conversion.
3.1 Orders for material under this specification shall include
1.2 This international standard was developed in accor-
the following information:
dance with internationally recognized principles on standard-
3.1.1 Form,
ization established in the Decision on Principles for the 3.1.2 Type of glass,
Development of International Standards, Guides and Recom-
3.1.3 Dimensions,
mendations issued by the World Trade Organization Technical 3.1.4 Marking and packaging, and
Barriers to Trade (TBT) Committee.
3.1.5 Certification (if required).
4. Chemical Composition
2. Referenced Documents
4.1 The typical chemical composition of this glass is as
2.1 ASTM Standards:
follows (Note 2):
C336 Test Method for Annealing Point and Strain Point of
Weight %
Glass by Fiber Elongation
C338 Test Method for Softening Point of Glass
Major Constituents:
C598 Test Method for Annealing Point and Strain Point of
Silica (SiO ) 65.0
Alumina (Al O)7.5
Glass by Beam Bending
2 3
Boron oxide (B O ) 18.0
2 3
D150 Test Methods forAC Loss Characteristics and Permit-
Soda (Na O) 2.0
tivity (Dielectric Constant) of Solid Electrical Insulation
Potash (K O) 3.0
Barium oxide (BaO) 3.0
D257 Test Methods for DC Resistance or Conductance of
Minor Constituents:
Insulating Materials
Lithium oxide (Li O) 0.6
E29 Practice for Using Significant Digits in Test Data to
Fluorine (F) 0.6, max
Reducible oxides (Note 3) 0.05, max
Determine Conformance with Specifications
E228 Test Method for Linear Thermal Expansion of Solid
NOTE 2—Major constituents may be adjusted to give the desired
Materials With a Push-Rod Dilatometer electricalandphysicalpropertiestotheglass.However,nochangeshallbe
made that alters any of these properties without due notification of, and
F14 Practice for Making and Testing Reference Glass-Metal
approval by, the user.
Bead-Seal
NOTE 3—Total of arsenic trioxide (As O ), antimony trioxide (Sb O ),
2 3 2 3
and lead oxide (PbO).
5. Physical Requirements
This specification is under the jurisdiction of ASTM Committee C14 on Glass
and Glass Products and is the direct responsibility of Subcommittee C14.04 on
5.1 The material shall conform to the physical properties
Physical and Mechanical Properties.
prescribed in Table 1. For electrical properties see Table 2, and
Current edition approved Nov. 1, 2019. Published November 2019. Originally
approved in 1968. Last previous edition approved in 2015 as F105 – 72 (2015). its Footnote A.
DOI: 10.1520/F0105-72R19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Finish and Workmanship
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 The glass shall have a finish that ensures smooth, even
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. surfaces and freedom from cracks, checks, bubbles, and other
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F105−72 (2019)
TABLE 1 Physical Requirements
A
Property ASTM Test Method Condition Value
Softening point C338 see 7.1 715±10°C
Annealing point C336 or C598 see 7.2 480±10°C
Thermal expansion coefficient E228 see 7.3 4.65 ± 0.20 ppm/°C
0 to 300 °C
Contraction coefficient E228 see 7.4 5.8 ± 0.20 ppm/°C
(annealing point minus 15 to 30 °C)
A
Test methods and conditions are detailed in the appropriately referenced section of this specification.
A
TABLE 2 Electrical Properties
from1.0to1.5°C/mintoatemperaturebelow200°C.Therate
ASTM Test Condition,
of cooling from the point below 200 to 100 °C shall not exceed
Property Typical Value
Method °C
5°C/min.Therateofcoolingfrom100°Ctoroomtemperature
Volume resistivity (dc) D257 25 log R (Ω·cm)
is optional. During this cooling schedule, determine the ther-
17.0
mal contraction curve and calculate the mean coefficient of
250 log R (Ω·cm)
9.1
linear thermal contraction between a point 1
...