磁器の材質と打音に関する研究

概要

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It is generally known that the percussion sound of the porcelain body reveals some of its qualities.The “Magnachina” which was invented in Japan has very bad percussion sound despite of its very good whiteness and translucency.The percussion sound of common porcelain, bone china and Magnachina bodies were studied quantitatively by measuring the Q values from the curves of damping oscillation by the brown tube and the oscilloscope.Porcelain bodies with good percussion sound have Q value more than 500 and those with best clear percussion sound have Q value of 800-1300, but Magnachina has Q value of about 200.It is suposed that the common porcelain and bone china bodies have good percussion sound because they are composed of mineral components with network structure such as feldspar, mullite or phosphates, but magnachina has bad percussion sound, because it is made up of non-network structure of magnesium silicate and therefore has large internal friction.
社団法人日本セラミックス協会の論文