ASTM F79-69(2005)

Standard Specification for Type 101 Sealing Glass

ABSTRACT
This specification covers Type 101 sealing glass for use in electronic applications. The glass shall have a finish that ensures smooth, even surfaces and freedom from cracks, checks, bubbles, and other laws of a character detrimental to the strength or life of the component or device for which its use is intended. Different test methods shall be performed in order to determine the following properties of the sealing glass: softening point, annealing point, thermal expansion coefficient, contraction coefficient, and bead seal.
SCOPE
1.1 This specification covers Type 101 sealing glass for use in electronic applications. Note 1 This specification is primarily intended to consider glass as most generally used, this is, glass in its transparent form as normally encountered in fabricating electronic devices. lists sealing metals and alloys that are compatible with this glass. Type 101 glass in other forms such as powdered, crushed, sintered, fibrous, etc. are excluded. The requirements of this specification, as applied to these forms, must be established in the raw glass prior to its conversion.

General Information

• Status: Historical
• Publication Date: 31-Aug-2005
• ICS: 21.140 - Seals, glands
• Technical Committee: C14 - Glass and Glass Products
• Drafting Committee: C14.04 - Physical and Mechanical Properties

Relations

• Replaces: ASTM F79-69(2000) - Standard Specification for Type 101 Sealing Glass
• Effective Date: 01-Sep-2005
• Replaced By: ASTM F79-69(2010) - Standard Specification for Type 101 Sealing Glass
• Effective Date: 01-Oct-2010
• Referred By: ASTM F144-80(2019) - Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
• Effective Date: 01-Sep-2005
• Referred By: ASTM F140-98(2020) - Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods
• Effective Date: 01-Sep-2005
• Referred By: ASTM F14-80(2019) - Standard Practice for Making and Testing Reference Glass-Metal Bead-Seal
• Effective Date: 01-Sep-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F79 – 69 (Reapproved 2005)
Standard Specification for
Type 101 Sealing Glass
This standard is issued under the fixed designation F79; the number immediately following the designation indicates the year of original
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 F144 Practice for Making Reference Glass-Metal Sandwich
Seal and Testing for Expansion Characteristics by Polari-
1.1 This specification covers Type 101 sealing glass for use
metric Methods
in electronic applications.
NOTE 1—This specification is primarily intended to consider glass as 3. Ordering Information
most generally used, this is, glass in its transparent form as normally
3.1 Orders for material under this specification shall include
encounteredinfabricatingelectronicdevices.X1.3listssealingmetalsand
the following information:
alloys that are compatible with this glass. Type 101 glass in other forms
3.1.1 Form,
such as powdered, crushed, sintered, fibrous, etc. are excluded. The
3.1.2 Type of glass,
requirements of this specification, as applied to these forms, must be
established in the raw glass prior to its conversion.
3.1.3 Dimensions,
3.1.4 Marking and packaging, and
2. Referenced Documents
3.1.5 Certification (if required).
2.1 ASTM Standards:
4. Chemical Composition
C336 Test Method for Annealing Point and Strain Point of
Glass by Fiber Elongation
4.1 The typical chemical composition of this glass is as
C338 Test Method for Softening Point of Glass
follows (Note 2):
C598 Test Method for Annealing Point and Strain Point of
Major Constituents Weight %
Glass by Beam Bending
Silica (SiO ) 56.0
D150 Test Methods for AC Loss Characteristics and Per-
Alumina (Al O)1.5
2 3
mittivity (Dielectric Constant) of Solid Electrical Insula-
Soda (Na O) 4.0
Potash (K O) 8.5
tion 2
Lead oxide (PbO) 29.0
D257 Test Methods for DC Resistance or Conductance of
Insulating Materials
Antimony trioxide (Sb O ) 1.0, max
2 3
Arsenic trioxide (As O ) 1.0, max
E29 Practice for Using Significant Digits in Test Data to 2 3
Determine Conformance with Specifications
Halogens 0.2, max
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
F14 PracticeforMakingandTestingReferenceGlass-Metal
made that alters any of these properties without due notification of, and
Bead-Seal
approval by, the user.
F140 PracticeforMakingReferenceGlass-MetalButtSeals
5. Physical Properties
and Testing for Expansion Characteristics by Polarimetric
Methods
5.1 The material shall conform to the physical properties
prescribed in Table 1. For electrical properties see Table 2 and
its Footnote A.
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
6. Workmanship, Finish, and Appearance
Physical and Mechanical Properties.
Current edition approved Sept. 1, 2005. Published October 2005. Originally
6.1 The glass shall have a finish that ensures smooth, even
approved in 1967. Last previous edition approved in 2000 as F79 – 67 (2000). DOI:
surfaces and freedom from cracks, checks, bubbles, and other
10.1520/F0079-69R05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or flaws of a character detrimental to the strength or life of the
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
component or device for which its use is intended.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
7. Test Methods
Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org. 7.1 Softening Point—See Test Method C338.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F79 – 69 (2005)
TABLE 1 Physical Requirements
A A
Property ASTM Test Method Condition Value
Softening point C338 sec 7.1 630 6 10°C
Annealing point C336 or C598 sec 7.2 435 6 10°C
Thermal expansion coefficient E228 sec 7.3 8.95 6 0.20 ppm/°C
0 to 300°C
Contraction coefficient E228 sec 7.4 10.10 6 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
linear thermal contraction between a point 15°C below the
ASTM Test annealing point and 30°C in accordance with Procedure B of
Property Condition Value (Typical)
Method
Test Method E228.
B
Volume resistivity (dc) D257 25°C log R (V·cm) 17.0
10 7.5 Bead Seal Test—The thermal contraction match be-
250°C log R (V·cm) 9.9
tween the glass and a sealing alloy may be determined by
350°C log R (V·cm) 7.8
preparing and testing an assembly in accordance with Practices
B
Dielectric constant (1 MHz) D150 20°C 6.7
F14, F140,or F144.
Dissipation factor (1 MHz) D150 20°C 0.0014
Loss index (1 MHz) D150 20°C 0.009
8. Test Results
A
While having no influence on the sealing capability of the glass, electrical
8.1 Observed or calcul
...