The preparation of two types of molecular sieves AlPO 4-11 and MAPO-11 is reported. The particle size of the latter is hundreds of microns, about 10 times larger than that of the former. The XRD, IR and DTA spectra h...The preparation of two types of molecular sieves AlPO 4-11 and MAPO-11 is reported. The particle size of the latter is hundreds of microns, about 10 times larger than that of the former. The XRD, IR and DTA spectra have demonstrated that magnesium has been introduced into the framework of AlPO 4-11. The successful preparation of large single crystal of MAPO-11 will open up a new area for the preparation of large molecular sieves crystals in the future. The large MAPO-11 crystal compound is a promising host for the host-guest assembly of composite materials.展开更多
Large single crystals of MAPO-43 molecular sieve have been synthesized hydrothermally using dimethylamine as the template. The typical molar composition of the starting mixture was 1.0P2O5 : 0.54Al2O3: 0.8MgO: 8.5CH3...Large single crystals of MAPO-43 molecular sieve have been synthesized hydrothermally using dimethylamine as the template. The typical molar composition of the starting mixture was 1.0P2O5 : 0.54Al2O3: 0.8MgO: 8.5CH3NHCH3: 0.68HF: 180H2O. The sample was characterized by XRD, TGA, DTA and IR.展开更多
用千兆位以太网还是ATM?为了消除网络拥塞,在路由IP主干的内核,Central System Research有另一个答案。它的Coreswitch80是Mapos的第一个实现。Mapos是一个出自NTT(NipponTelegraph and Telephone Corp.)的通过Sonet传送数据包的方案。 ...用千兆位以太网还是ATM?为了消除网络拥塞,在路由IP主干的内核,Central System Research有另一个答案。它的Coreswitch80是Mapos的第一个实现。Mapos是一个出自NTT(NipponTelegraph and Telephone Corp.)的通过Sonet传送数据包的方案。 Mapos能够以ATM的速率——155或622Mbit/s——处理IP而又没有ATM的复杂性。与ATM不同。展开更多
基金Supported by the National Natural Science Foundation of China(No. 2 99310 10 )
文摘The preparation of two types of molecular sieves AlPO 4-11 and MAPO-11 is reported. The particle size of the latter is hundreds of microns, about 10 times larger than that of the former. The XRD, IR and DTA spectra have demonstrated that magnesium has been introduced into the framework of AlPO 4-11. The successful preparation of large single crystal of MAPO-11 will open up a new area for the preparation of large molecular sieves crystals in the future. The large MAPO-11 crystal compound is a promising host for the host-guest assembly of composite materials.
文摘Large single crystals of MAPO-43 molecular sieve have been synthesized hydrothermally using dimethylamine as the template. The typical molar composition of the starting mixture was 1.0P2O5 : 0.54Al2O3: 0.8MgO: 8.5CH3NHCH3: 0.68HF: 180H2O. The sample was characterized by XRD, TGA, DTA and IR.
文摘用千兆位以太网还是ATM?为了消除网络拥塞,在路由IP主干的内核,Central System Research有另一个答案。它的Coreswitch80是Mapos的第一个实现。Mapos是一个出自NTT(NipponTelegraph and Telephone Corp.)的通过Sonet传送数据包的方案。 Mapos能够以ATM的速率——155或622Mbit/s——处理IP而又没有ATM的复杂性。与ATM不同。
