环保产品研发及技术的开发，环保工程总承包，电力工程设计，环保工程、环保设施营运及技术服务，烟气处理、废污水处理、固体废弃物（不含危险废物）处理的相关工程设计、施工、技术咨询及工程总承包，噪音治理、环保及能源技术开发、技术服务，经济信息及工程咨询服务，市政公用工程、房屋建筑工程、装饰工程的施工，金属材料、化工原料及产品（不含化学危险品及易制毒化学品）、五金交电、建筑材料、金属材料的销售，从事进出口业务，实业投资，水泥搅拌站、混凝土、新型建筑材料的开发，墙体材料的研发、销售及检测服务，建筑材料的生产（限分支机构经营）。（依法须经批准的项目，经相关部门批准后方可开展经营活动）
In order to overcome the mechanical weakness of cordierite ceramics based on fly ash,lanthanum fluoride(LaF3)was introduced in the fabrication process as high efficiency additive,resulting in cordierite ceramics with excellent mechanical properties.When the addition of LaF3 was 1.0 wt.%and the sintering temperature was 1300℃,elastic modulus,hardness and compressive strength of the samples were 200.09 GPa,17.63 GPa and 118.41 MPa,respectively.The significant enhancement was mainly attributed to the enhanced liquid fluidity and densification effect.At the same time,lanthanum was enriched at grain boundaries to facilitate grain refinement and toughening.Besides,a small quantity of lanthanum might be incoporated into the cordierite lattice,which would have a positive effect on mechanical strengthening.
