DC型PDPの陰極材料に関する研究 : LaB_6陰極のXe吸着

概要

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It has been well known that a cathode made of LaB_6 adsorbs xenon in a DC-type PDP and that a composite cathode made of LaB_6 and BaAl_2O_4 adsorbs xenon and krypton. The work described in this report investigared this adsorption through the optical emission spectrum and its intensities, before and after aging test of cathodes, where the cathode surfaces were analyzed by XMA method. Coating materials composed of BaAl_2O_4 and conductive ceramics such as LaB_6,GdB_6,NdB_6,WB, and MoB were tested, and each coating material was deposited on the cathode surface by using a plasma-spray technique. The plasma gases tested were He-Ar-Ne gas mixtures with a small amount of xenon or krypton or both. From the distribution pattern of x-ray images, the xenon ad krypton distributions overlapped the lantanum distribution but did not overlap the distributions of barium, aluminum, or the other elements of the cathodes. We therefore concluded that xenon and krypton ions trapped by the cathode are bounded and stabilized by a LaB_6 crystal. The results also showed that GdB_6 adsorbed xenon slowly and that NdB_6 and MoB did not adsorb xenon or krypton at all.
社団法人映像情報メディア学会の論文
1997-03-20