Synthesis and characterization of high purity barium calcium aluminates for TWT impregnated cathodes

Sene, F.F.; Santos, Vinícius Oliveira dos; Motta, C.C.

doi:10.1109/ivesc.2012.6264172

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Solutions of aluminum nitrate and barium nitrate and sodium carbonate with given concentrations were supplied from tanks (1, 2) to the reactor (6) through the thermostat (5) by peristaltic pumps (3,4). Precipitation was carried out at room temperature.…”

Section: The Experimental Proceduresmentioning

confidence: 99%

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The Influence of Ageing Process on the Barium Aluminate Phase Composition

et al. 2016

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Abstract. Barium aluminates were formed by the continuous precipitation method at different values of pH. The influence of ageing process and precipitation pH on the phase composition of the precipitate after firing was found. It was showed that there is growth of the 3BaOAl2O3 concentration after ageing of precipitate during 7 days. Presumably, this process is associated with a decrease in the number of crystals, increasing their size in the ageing process of precipitate and chemical processes that occur during ageing: hydrolysis, hydration, dehydration.

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Section: The Experimental Proceduresmentioning

confidence: 99%

“…Recently, technologies for obtaining chemically pure substances [1][2][3] found wide application. The classical method for preparing active substance is firing of barium carbonate with calcium carbonate and aluminum oxide ( fig.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Ageing Process on the Barium Aluminate Phase Composition

et al. 2016

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“…The suspension containing the aluminate is prepared and deposited on the porous tungsten cathode surface bottom, previously decoppered. The sample is impregnated at 1650 o C for 1 min and analyzed by SEM, coupled to EDS [1].…”

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Work function measurements on 5-3-2 tungsten dispenser cathodes using the Miram curves

Motta

Erbert

2014

2014 Tenth International Vacuum Electron Sources Conference (IVESC)

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The work functions of 5BaO.3CaO.Al2O3 porous tungsten dispenser cathodes were evaluated using practice work function technique of Miram to compare the coated and uncoated cathodes performance. Details of experimental apparatus used to measurement are presented and discussed.The work functions of 5BaO . 3CaO . Al 2 O 3 porous tungsten dispenser cathodes were evaluated using Practice Work Function Distribution (PWFD) technique of Miram to compare the coated and uncoated cathodes performance. Details of experimental apparatus used to measurement are presented and discussed.

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