Ｂ値法を用いた調湿セラミック材料の調湿特性評価

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  • Characterization of Humidity Conditioning Ceramics by B-Value Method.
  • Bチホウ オ モチイタ チョウシツセラミック ザイリョウ ノ チョウシツトクセイ ヒョウカ

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To characterize humidity conditioning ceramics, the relative humidity as a function of temperature (H(T)) was measured using a glass desiccator technique with varying the ambient temperature between 298 and 288K. A logarithmic plot of H(T) was approximately represented by a linear function, and the humidity conditioning ability was evaluated by the slope (B) of such a linear equation (B-value method). Humidity conditioning ceramics, made of several ceramic materials such as Wakkanai diatomaceous shale, calcium silicate and zeolite, were characterized according to their B-values in comparison with wood. The relation between the B-value and the ratio of the exposed surface area of the material to the volume of desiccator was also investigated to extend the efficiency of the B-value method to the large scale of actual applications. It was also found that the B-value method to estimate the humidity conditioning ability for wooden material can be applied to porous ceramics, which had B-values higher than wood. The porous diatomaceous ceramics showed the highest B-value among the ceramic investigates.

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