30results about How to "Avoid high temperature sintering process" patented technology

The invention discloses a preparation method for a reinforced titanium matrix composite of a three-dimensional network-shaped carbon nanotube. The method comprises the processes as follows: sodium chloride powder and pure titanium powder are mixed into a blank, and sintering and dissolution are performed, so that porous titanium is obtained; and the porous titanium is immersed into a catalyst solution prepared through cobalt nitrate or nickel nitrate and yttrium nitrate, and the porous titanium loaded with catalyst salt is subjected to calcination, hydrogen gas reduction and catalytic cracking, so that the reinforced titanium matrix composite of the three-dimensional network-shaped carbon nanotube is obtained. The preparation method has the advantages as follows: on one hand, a catalyst, a growth technology and the like are adjusted, so that the carbon nanotube with homo-disperse and an integral structure can directly grow on the porous titanium; and on the other hand, the porous titanium can be directly taken as a composite material matrix, so that a subsequent high-temperature sintering process is avoided, an integral structure of the matrix and a reinforced phase is guaranteed, and the preparation process of the method is simple, and the implementation and the promotion are facilitated.

The invention relates to a preparation method of a porous oxide semiconductor nano-film. The technical scheme of the preparation method is as follows: a film is simultaneously or alternately deposited on the surface of a substrate in the presence of Ar or a mixed atmosphere of Ar and O2 by using a co-sputtering technique and adopting an oxide semiconductor target (or a corresponding metal target) and a pore former target, then a composite nano-film with an oxide phase and a pore former phase is preformed, after the preformed composite film is washed by water, a pore former is dissolved, then a porous nano-film is obtained, finally, the film is dried and annealed to obtain a nano-film with good crystallinity, high orientation and high porosity.

The invention discloses a Ni-Zn-Fe oxide material with expressive formula as Ni0.5Zn0.5Fe2O4, which comprises the following steps: weighing pure ferric citrate, zinc nitrate and nickel nitrate; dissolving zinc nitrate and nickel nitrate into deionized water; blending to add ferric citrate; stirring evenly to obtain clear former solution; heating the former solution; evaporating solvent to form black red foaming material; producing self-combustion; bulking the foaming material to obtain the loose brown powder; compressing the brown powder; sintering to obtain the product.

The invention discloses an ecologic water-permeable brick and a making method thereof. The water-permeable brick comprises, by weight, 10-35 parts of a gelling material, 60-80 parts of aggregates, 1-5 parts of an additive and 2-30 parts of water. The making method comprises the following steps: 1, mechanically activating an admixture; 2, carrying out heat-alkali dual activation on the admixture; 3, mixing and stirring the gelling material; 4, carrying out compaction molding on the water-permeable brick; and 5, curing the water-permeable brick. The method provides the water-permeable brick with excellent performances for the market, gradually supplements increasing scarce underground water resources, improves the urban ecologic environment, and has good social and economic benefits.