Materials Culturology Discussions on The Concept of 'Light' in Future Materials Civilization -Presentation of The Concept of Electric Candle Accepting 'Night and Day' as They are

摘要

In this paper, in order to create a new concept of "light" in future materialscivilization, the light technologies in various pre-modern materials civilizationsaccepting "night and day" as they are, were taken into notice and discussed from 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 ofrnaterials engineering and cuIturology.The following results were obtained.i) In various pre-modern materials civilizations accepting "night and day" asthey are, natural regenerable materials can be pointed out to be chosen as lightmaterials and satisfy the condition of the keeping the consumption not to increaseenermously.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 the condtion of i).iii) The "electric candle" accepting "night and day" as they are, is assembled by three of water decomposition by sun light, hydrogen fuel cell, and white color light emitting diode.iv) SiTi03, Sro87SPbo125Ti03, and Sro75Pbo"Ti03, are selected as optimum waterdecomposition catalysts and are assembled as the catalyst elements by pinconjunction.v) Thin film of ZrLy ,Ca y Ge,02, (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), GaP 1.o"N o25(green) , and Zn L005Mgoo,Se 1.o05Soo5(blue).vii) Necessary dimensions of electric light to emit white color light of 1 candlefor two hours in night after being irradiated by daylight for seven hours are estimated as follows; Hydrogen fuel cell, white color light emitting diode and waterdecomposition part are respectively 5cm X 2cm X 2cm, 1.0cm ¢ X 0,65m, and4,Ocm ¢ X 150cm.viii) The concept of "electric candle" can be taken to indicate the "proto type" of white colour light in futue materials civilization.