To provide a nitriding evaporation type getter device having a high endurance during the frit sealing works for an image receiving tube and establish a method for manufacturing such getter devices.
A nitriding evaporation type getter device has an open metal vessel accommodating a mixture of (i) BaAl4 in powder form of particle sizes below 250 μm, (ii) nickel in powder form whose portion at least 80 wt.% has particle sizes ranging 10-60 μm and remainder has particle sizes smaller than 10 μm, and (iii) a third component which consists of particles of nitriding compounds selected from among iron nitride, germanium nitride, and mixed iron-germanium nitride having particle sizes smaller than 125 μm, wherein the particles are covered with a thin glass-natured layer of mixed oxides including boron oxide and silicon oxide formed through a sol-gel process using a starting solution whose boron-silicon atomic ratio ranges from approx. 0.75:1 to 4:1.
MARTELLI DANIELE
CARRETTI CORRADO
INNOCENZI PLINIO
GUGLIELMI MASSIMO
MARTUCCI ALESSANDRO
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