Improvement of electrical properties of wood by combination with ceramics

本项目交易的目的是通过木材制成的木材-陶瓷复合材料来改进电气特性，其中有特征性皮氮电和电气特性，以及木材基材料的碳化，其中含有非有机复合材料，以控制碳基木材基材料的电气和物理特性。一种固体凝胶工艺方法被应用于订购制成木质-非有机复合材料。Pb-Ti和Pb-Zr复合材料的金属化合物在湿溶胶状态下被抑制。水玻璃和玻璃气球被命名为Shirasu气球在木质粉末中添加了5 - 40%的含量，它是用粉末在压力下的物理树脂制成的，在190个以上的压力下生产的。C.碳化是在500和800个以上的温度下生产的。C.物体陶瓷的次要成分被溶胶-凝胶方法成功了，但期望的电气性能的改进是不够的。“因为凝胶老化的温度是不够的，不能使物体材料凝结。However，温度150-C是防止木材的热降解的极限;碳材料的电抵抗力依赖于碳化的温度。抵抗力超过1个MOMEGA·厘米，超过500个C的治疗，低于1个OMEGA·厘米，超过800个C的治疗，这明显是通过添加少量的水玻璃，低于5%的含量。在玻璃气球的情况下，它增加了LMOMEGA·厘米以40%的内容添加。热传导率为0.1-0.2 W·m^<-1>·K^<-1>，因此与固体木材的密度几乎相同。它提供了一种新的非有机物质的添加物，以有效地控制碳化木材材料的耐药性，作为一种未来的方法，将由木材粉和陶瓷粉组成，无论是电气和磁性材料，其特征都是有效的。

This project deals with improvement of electrical properties of wood by forming wood-ceramics composites which have characteristic piezoelectricity and dielectricity and by carbonization of wood based materials which contain inorganic composites in order to control electrical and physical properties of the carbonized wood based material.A sol-gel process method was applied in order to form wood-inorganic composites. Metal alkoxides of Pb-Ti and Pb-Zr composites were impregnated in wet-sol state. Water glass and glassy balloon named shirasu balloon were added between 5 to 40 % in content to wood powder, and it was formed by using powder phenolic resin under pressure at 190ﾟC.The carbonization was made at 500 and 800ﾟC.The sedimentation of object ceramics was succeeded by the sol-gel method, but the desired improvement of electrical properties was not enough, because the temperature for aging of the gel was not enough to crystallize the object materials. However, the temperature 150ﾟC was the limit to prevent the thermal degradation of wood.The electrical resistivity of the carbonized materials depended on the temperature of carbonization. The resistivity was above 1 MOMEGA・cm by the treatment of 500ﾟC, and below 1 OMEGA・cm by the treatment of 800ﾟC.It increased remarkably by adding the small amount of the water glass, below 5% incontent. In the case of glass balloon, it increased above lMOMEGA・cm by adding 40% in content. Thermal conductivity was 0.1-0.2 W・m^<-1>・K^<-1>, which is almost equivalent to that of solid wood whose density is almost same. It was proved that the addition of inorganic substance was efficient to control resistivity of carbonized wood materials.As a future approach, the carbonization of the composites which are composed of wood powder and ceramics powder whose electrical and magnetic properties are characteristic will be efficient.