EXERGY CONSUMPTION EVALUATION OF A SILICON NITRIDE MANUFACTURING PROCESS

The quality of energy is evaluated by "Exergy". By contrast to the amount of energy preserved, the exergy is irreversibly consumed. The balance of consumed raw materials, energy and exergy in the synthesis of silicon nitride ceramics that are made from silicon nitride or silicon powder was...

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Bibliographic Details
Published inJournal of Ceramic Processing Research Vol. 11; no. 6; pp. 721 - 727
Main Authors Kita, H, Hyuga, H, Tian, W, Nagaoka, T, Kondo, N
Format Journal Article
LanguageEnglish
Published 2010
Subjects
Ceramics
Consumption
Energy consumption
Exergy
Raw materials
Silicon
Silicon nitride
Sintering (powder metallurgy)
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Summary:The quality of energy is evaluated by "Exergy". By contrast to the amount of energy preserved, the exergy is irreversibly consumed. The balance of consumed raw materials, energy and exergy in the synthesis of silicon nitride ceramics that are made from silicon nitride or silicon powder was quantified. The input exergy was reduced by using Si powder as the main raw material with sintering additives of ZrO2 and spinel. In the manufacturing process of silicon nitride, the majority of the input exergy is consumed in the sintering step. The relationship between the input exergy in the sintering step and the sintering temperature, holding temperature and the total time was analysed by a regression method, which gave guidelines for the rationalisation of the manufacturing process.
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ISSN:1229-9162