浅谈绿色建筑装饰材料及装饰材料的选用

随着国民经济的发展，城市规模不断扩大，旧城改造，新城市增加，房地产业蓬勃发展。一座座城市，旧貌换新颜，蒸蒸日上。这其中，建筑设计水平提高、施工机具及施工工艺的创新改进、建筑材料及建筑装饰材料的发展，发挥了不可磨灭的巨大作用。无论造访哪个城市，都会欣喜发现，规模从几万平方米到几十万平平方米，管理有素的现代化住宅小区，像雨后春笋。一栋栋漂亮的住宅建筑，融入一片天蓝、水清、树绿、路平的花园般环境中，充分体现了关爱人们身体健康的环境保护意识。     

生活垃圾可制成地板砖

果皮、废纸、塑料袋、沙石、钢渣等各种生活垃圾,粉碎后加入特制配液处理,便能成为结实耐用、质量上乘的建筑装饰材料。日前,上海天南垃圾处理工程有限公司利用自行开发的垃圾综合利用专利技术,将生活垃圾成功转化为有用资源。利用这一专利技术,生活垃圾经过一系列除臭、粉碎、杀菌、搅拌后,和生物试剂及辅料混合,再通过多功能制砖机打制后,各种地板砖、路基砖、图形墙体板等建筑材料便一一“出炉”。全部生产过程在常温下进行,且不排污,生产对大气、水源、土壤等均不造成二次污染,全部处理过程均在环保指标控制范围之内。此项技术取材面广,…     

重视过程控制工程安装材料的选择

本文结合工程介绍了自动化仪表工程设计中常用安装材料的正确选择方法和选择不当可能造成的危害。     

Spin Dependent Hopping in Ti Doped La0.67 Ca0.33 MnO3

A systematic investigation of the magnetic and transport properties of Ti doped La0.67Ca0.33MnO3 was reported. The Ti substitution for Mn ions results in a reduction in ferromagnetism and conductivity. The metal-insulator transition temperature is close to Curie temperature which decreases from 274 to 82 K as x increases from 0 to 0.17. The most important effect of Ti doping is to introduce spin clusters in the samples due to the distortion of local lattice and the inhomogeneous magnetic structure induced primarily by the random distribution of Mn ions. A maximum magnetoresistance ratio as large as 90% in 1 T at 122 K was obtained for the sample with x =0. 055, which is four times larger than that obtained for LCMO sample at 272 K. There is a remarkable field-history dependent MR in the cooling process for the doped samples while such phenomenon disappears in the warming run. The resistivity follows well the variable range hopping behavior in paramagnetic state. Both the size effect and spin dependent hopping of carriers between the spin clusters should be considered in this system.