ASTM F111-96(2002) PDF

1.1 This practice describes techniques for the determination of evaporated barium yield, getter gas content, and getter carbon monoxide sorption capacity for barium flash getters used in electron devices. Test conditions are chosen to approximate use conditions.

1.2 Auxiliary procedures for cleaning, for determining vacuum system leak-up rates, for flashing getters, and for determining barium content in both getter fill and films are also given.

1.3 The various tests described are destructive in nature. In general the tests are semiquantitative but they can be expected to yield comparative information on a single-laboratory basis to the precision indicated. No information relative to multilaboratory reproducibility is available.

1.4 List of Methods Described

MethodSectionBarium Content, Determination of,9Acid-Base Titration Method9.6Complexation (Titration) Method9.7Gravimetric Method9.4Photometric Method9.5Weight Difference Method9.8Barium Yield, Determination of,10Carbon Monoxide Sorption Characteristics, Determination of12Cleaning Procedures6Getter Mount6.3Getter Test Bulb6.4Flashing Procedures8Gas Content, Determination of for Doped Getters:11Hydrogen11.7Nitrogen for Undoped Getters:11.8Preflash Gas Content11.5Total Gas Content11.4Leak-Up Rates, Determination of7

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 4.

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Number of Pages :	15
Published :	01/01/2002