ASTM F77-69(1996)

Test Method for Apparent Density of Ceramics for Electron Device and Semiconductor Application (Withdrawn 2001)

SCOPE
1.1 This test method covers the determination of the apparent density of ceramic parts, used in electron device and semiconductor applications, with a maximum dimension of 25 mm (1 in.) and having zero or discontinuous porosity.  
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability or regulatory limitations prior to use.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1995
• Withdrawal Date: 09-May-2001
• ICS: 29.045 - Semiconducting materials
• ICS: 81.060.20 - Ceramic products
• Technical Committee: C21 - Ceramic Whitewares and Related Products
• Drafting Committee: C21.03 - Methods for Whitewares and Environmental Concerns

Relations

• Referred By: ASTM D116-86(2020) - Standard Test Methods for Vitrified Ceramic Materials for Electrical Applications
• Effective Date: 01-Jan-1996
• Referred By: ASTM C729-11(2022) - Standard Test Method for Density of Glass by the Sink-Float Comparator
• Effective Date: 01-Jan-1996
• Referred By: ASTM D2442-75(2020) - Standard Specification for Alumina Ceramics for Electrical and Electronic Applications
• Effective Date: 01-Jan-1996

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 77 – 69 (Reapproved 1996)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Apparent Density of Ceramics for Electron Device and
Semiconductor Application
This standard is issued under the fixed designation F 77; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
personnel. Instructions on how to mix solutions from these salts and the
1. Scope
methods of handling them are best obtained from competent chemical
1.1 This test method covers the determination of the appar-
manufacturing companies or qualified chemical laboratories.
ent density of ceramic parts, used in electron device and
semiconductor applications, with a maximum dimension of 25 5. Procedure
mm (1 in.) and having zero or discontinuous porosity.
5.1 Before using the specific gravity balance, be sure that it
1.2 The values stated in SI units are to be regarded as the
has been properly calibrated according to manufacturer’s
standard. The values in parentheses are for information only.
instructions or to methods agreed upon between the purchaser
1.3 This standard does not purport to address all of the
and the seller.
safety concerns, if any, associated with its use. It is the
5.2 Hang the plummet on the left side of the balance and set
responsibility of the user of this standard to establish appro-
the beam rider and the vernier at zero reading. Adjust the
priate safety and health practices and determine the applica-
balance to null by turning the nut at the extremities of the beam
bility of regulatory limitations prior to use.
of the balance or the adjusting knob of the vernier.
5.3 Fill the cylinder provided with the balance with boiled
2. Referenced Documents
distilled water to about 25 mm (1 in.) from the top and place it
2.1 ASTM Standards:
on the platform directly under the plummet. Immerse the
E 29 Practice for Using Significant Digits in Test Data to
plummet in the water by raising the platform until the top of the
Determine Conformance with Specification
plummet is approximately 13 mm (0.5 in.) below the surface of
the liquid. Be sure that no air bubbles stick to the sides of the
3. Apparatus
plummet. Note and record the temperature of the water, T .
w
3.1 Specific Gravity Balance, sensitivity of 0.1 mg (Note 1).
Manipulate the rider and vernier to bring the needle to zero.
3.2 Tweezers.
(No attempt should be made to arrive at the final reading by
3.3 Glass Stirring Rod.
oscillating the needle.) Record this reading as S . Remove the
w
3.4 Thermometer.
water from the cylinder and dry the plummet and the cylinder
3.5 Reference Standard (Note 2).
thoroughly.
5.4 Using tweezers, immerse the specimen of ceramic,
NOTE 1—Balances of types other than those designed specifically for
the determination of specific gravity may be used as agreed upon between
properly cleaned and dried, in a beaker of high density liquid
the purchaser and the seller.
on which the specimen will float. The volume of liquid should
NOTE 2—A reference standard may be calibrated and used by the
not be less than 50 mL and should be large enough for the
purchaser and the seller if desired. The calibration should be completed
specimens to float freely.
and its accuracy determined before this test method is used to establish the
5.5 Lower the specific gravity of the liquids slowly by
density of any purchased parts.
adding water, drop by drop, to the beaker until the density of
4. Materials
liquid equals that of the specimen. (Each drop of water should
not lower the specific gravity of the solution by more than
4.1 High-Density Liquids, namely, thallium malonate-
0.003 g/cm .) This condition is indicated when the specimen
formate solutions (Note 3) and
starts to suspend in the liquid (sink below the surface of the
4.2 Boiled, Gas-Free Distilled Water.
liquid) and will remain stationary when placed in any posit
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