Materiala | h (mm) | λ [W/(m K)]b | Ra (µm)c | Rz (µm)c |
|---|
Uzukuri wood | 20 (+SP 24) | 0.106 | 52.38 | 234.91 |
Sanded wood | 20 (+SP 24) | 0.120 | 3.65 | 35.46 |
Marble | 20 (+SP 24) | 1.947 | 0.16 | 3.22 |
- The evaluation length was 50 mm. The cut-off value was 8 mm. The central portion of the samples was measured five times with 50-mm spacing, and the average value was calculated
- h Thickness of the material, λ thermal conductivity, Ra arithmetic average roughness, Rz maximum height roughness, SP structural plywood
- aThe samples were cut out from the center part of the material to a size of 300 × 300 mm, and their physical properties were assessed. Note that the wood samples were used with the cedar plywood attached. b A heat flow meter (HFM 436 Lambda; NETZSCH, Selb, Germany), tuned according to ASTM C518-10 [19] and ISO8310 [20], was used. The direction of heat flow was vertically downward. The temperatures of the high- and low-temperature heat plates were 35 °C and 15 °C, respectively. The thermal conductivity at an average material temperature of 25 °C was calculated. c To determine the roughness of the material, a contact surface roughness profilometer (SE3500; Kosaka Laboratory Ltd., Tokyo, Japan) with a diamond stylus was used
