B2O3 Base Glasses: B87a

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Borate Glasses

Material Summary:

Molar composition: 87.9% B2O3 + 12.0% PbO

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....:  1.63  Air          Indentation crack length
                                    1.59  Air          Notched beam 

Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........: 31.2   Air               
Fracture Energy [J/m2]  ..........: 49.08  Air          Indentation crack length
                                   41.03  Air          Notched beam 
Fracture Toughness [MPa m1/2].....:  1.75  Air          Indentation crack length
                                    1.6   Air          Notched beam


Privacy Statement/Security Notice
Disclaimer | FOIA

NIST is an agency of the
U.S. Commerce Department

Date created: 08 February 2001
Last updated: 08 February 2001

Technical inquiries:
Ceramics Division
NIST, 100 Bureau Drive, Stop 8520, Gaithersburg, MD 20899-8520.
Phone (301) 975-6119
Fax (301) 975-5334

Ceramics website comments:
Ceramics Webmaster

General NIST inquiries:
Public Inquiries Unit:
Phone (301) 975-NIST (6478)
TTY (301) 975-8295