抄録
In this paper, in order to create a new concept of “light” in future materialscivilization, the light technologies in various pre-modern materials civilizations accepting “night and day” as they are, were taken into notice and discussedfrom a point of materials civiliqation. As the result, “electric candle” was conceptually presented as a new concept “light”accepting “night and day” as they are.
And the feasibility was fundamentally discussed from a point of materials engineering and culturology.
The following results were obtained.
i) In various pre-modern materials civilizations accepting “night and day” as they are, natural regenerable materials can be pointed out to be chosen as lightmaterials and satisfy the condition of the keeping the consumption not to increase enermously.
ii) The “electric candle” accepting “night and day” as they are, is operated byuse of water and sun light only as energy sources. And it satisfies thecondtion of i).
iii) The “electric candle” accepting “night and day” as they are, is assembledby three of water decomposition by sun light, hydrogen fuel cell, and whitecolor light emitting diode.
iv) SiTiO3, Sr0.875 Pb0.125 TiO3, and Sr0.75 Pb0.25 TiO3, are selected as optimum waterdecomposition catalysts and are assembled as the catalyst elements by pinconjunction.
v) Thin film of Zr1-y-z Cay Gex O2-y (y=0.2-0.3, z=0.18-0.20) is pointed out tobe able to be used as soild electrolyte operating at normal temperature.
vi) White color light emitting diode is realized by the combination of GaAs (red), GaP1-0.25N0.25 (green), and Zn1-0.055Mg0.05Se1-0.05So0.05 (blue).
Vii) Necessaryd imensionsofelectric light to emit white color light of 1candle for two hours in night after being irradiated by daylight for seven hours are estimatedas follows; Hydrogen fuelcell, white color light emitting diode and waterdecomposition part are respectively 5cm×2cm×2cm, 1.0cm∅×0.65m, and4.0cm∅×150cm.
viii) The concept of “electric candle” can be taken to indicate the “proto type” of white colour light in futue materials civilization.
