Formerly under the jurisdiction of Committee F01 on Electronics, this practice was withdrawn in June 2008 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
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
|Barium Content, Determination of,||9|
|Acid-Base Titration Method||9.6|
|Complexation (Titration) Method||9.7|
|Weight Difference Method||9.8|
|Barium Yield, Determination of,||10|
|Carbon Monoxide Sorption Characteristics, Determination of||12|
|Getter Test Bulb||6.4|
|Gas Content, Determination of for Doped Getters:||11|
|Nitrogen for Undoped Getters:||11.8|
|Preflash Gas Content||11.5|
|Total Gas Content||11.4|
|Leak-Up Rates, Determination of||7|
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.
barium content; barium yield; getter materials; getter sorption capacity;
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