ASTM F79-69(2000)

Standard Specification for Type 101 Sealing Glass

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. Appendix X1.3 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-Dec-1999
• 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(1995)e1 - Standard Specification for Type 101 Sealing Glass
• Effective Date: 01-Jan-2000
• Replaced By: ASTM F79-69(2005) - Standard Specification for Type 101 Sealing Glass
• Effective Date: 01-Sep-2005
• 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-Jan-2000
• 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-Jan-2000
• Referred By: ASTM F14-80(2019) - Standard Practice for Making and Testing Reference Glass-Metal Bead-Seal
• Effective Date: 01-Jan-2000

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F 79 – 69 (Reapproved 2000)
Standard Specification for
Type 101 Sealing Glass
ThisstandardisissuedunderthefixeddesignationF 79;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Ordering Information
1.1 This specification covers Type 101 sealing glass for use 3.1 Orders for material under this specification shall include
in electronic applications. the following information:
3.1.1 Form,
NOTE 1—This specification is primarily intended to consider glass as
3.1.2 Type of glass,
most generally used, this is, glass in its transparent form as normally
3.1.3 Dimensions,
encounteredinfabricatingelectronicdevices.X1.3listssealingmetalsand
alloys that are compatible with this glass. Type 101 glass in other forms 3.1.4 Marking and packaging, and
such as powdered, crushed, sintered, fibrous, etc. are excluded. The
3.1.5 Certification (if required).
requirements of this specification, as applied to these forms, must be
established in the raw glass prior to its conversion.
4. Chemical Composition
4.1 The typical chemical composition of this glass is as
2. Referenced Documents
follows (Note 2):
2.1 ASTM Standards:
Major Constituents Weight %
C 336 Test Method for Annealing Point and Strain Point of
Silica (SiO ) 56.0
Glass by Fiber Elongation
Alumina (Al O)1.5
2 3
C 338 Test Method for Softening Point of Glass
Soda (Na O) 4.0
C 598 Test Method for Annealing Point and Strain Point of
Potash (K O) 8.5
Glass by Beam Bending Lead oxide (PbO) 29.0
D 150 Test Methods for A-C Loss Characteristics and
Antimony trioxide (Sb O ) 1.0, max
2 3
Permittivity (Dielectric Constant) of Solid Electrical Insu-
Arsenic trioxide (As O ) 1.0, max
2 3
lating Materials
Halogens 0.2, max
D 257 Test Methods for D-C Resistance or Conductance of
Insulating Materials NOTE 2—Major constituents may be adjusted to give the desired
electricalandphysicalpropertiestotheglass.However,nochangeshallbe
E 29 Practice for Using Significant Digits in Test Data to
4 made that alters any of these properties without due notification of, and
Determine Conformance with Specification
approval by, the user.
E 228 Test Method for Linear Thermal Expansion of Solid
Materials with a Vitreous Silica Dilatometer
5. Physical Properties
F 14 Practice for Making and Testing Reference Glass-
5.1 The material shall conform to the physical properties
Metal Bead-Seal
prescribed in Table 1. For electrical properties see Table 2 and
F 140 Practice for Making Reference Glass-Metal Butt
its Footnote A.
Seals and Testing for Expansion Characteristics by Polari-
metric Methods
6. Workmanship, Finish, and Appearance
F 144 Practice for Making Reference Glass-Metal Sand-
6.1 The glass shall have a finish that ensures smooth, even
wich Seal and Testing for Expansion Characteristics by
surfaces and freedom from cracks, checks, bubbles, and other
Polarimetric Methods
flaws of a character detrimental to the strength or life of the
component or device for which its use is intended.
This specification is under the jurisdiction of ASTM Committee C14 on Glass
7. Test Methods
and Glass Products and is the direct responsibility of Subcommittee C14.04 on
Physical and Mechanical Properties.
7.1 Softening Point—See Test Method C 338.
Current edition approved Feb. 20, 1969. Published April 1969. Originally
7.2 Annealing Point—See Test Method C 336 or Test
published as F 79 – 67 T. Last previous edition F 79 – 67.
Method C 598.
Annual Book of ASTM Standards, Vol 15.02.
Annual Book of ASTM Standards, Vol 10.01.
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 79 – 69 (2000)
TABLE 1 Physical Requirements
A A
Property ASTM Test Method Condition Value
Softening point C 338 sec 7.1 630 6 10°C
Annealing point C 336 or C 598 sec 7.2 435 6 10°C
Thermal expansion coefficient E 228 sec 7.3 8.95 6 0.20 ppm/°C
0 to 300°C
Contraction coefficient E 228 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
7.5 Bead Seal Test—The thermal contraction match be-
ASTM Test tween the glass and a sealing alloy may be determined by
Property Condition Value (Typical)
Method
preparing and testing an assembly in accordance with Practices
B
Volume resistivity (dc) D 257 25°C log R (V·cm) 17.0
F 14, F 140, or F 144.
250°C log R (V·cm) 9.9
350°C log R (V·cm) 7.8
8. Test Results
B
Dielectric constant (1 MHz) D 150 20°C 6.7
Dissipation factor (1 MHz) D 150 20°C 0.0014 8.1 Observed or calculated values obtained from measure-
Loss index (1 MHz) D 150 20°C 0.009
ments, tests, or analysis shall be rounded in accordance with
A
While having no influence on the sealing capability of the glass, electrical
the rounding method of
...