Method for preparing nano heterogeneous ceramic by modified porous structural powder
A technology of porous structure and multiphase ceramics, applied in the field of ceramics, can solve the problems such as the difficulty of fully dispersing nanoparticles, and achieve the effect of uniform distribution of components
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Embodiment 1
[0017] AlCl 3 Hydrolysis, polymerization, preparation of aluminum polyhydroxy complex ion, [Al 13 o 4 (OH) 24 (H 2 O) 12 ] 7+ ions, making diatomite into a suspension, adding aluminum polyhydroxyl complex ions into the suspension, and stirring the aluminum polyhydroxyl complex ions into the pores of the diatomite to prepare a modified porous structure powder. The modified powder is mixed with ceramic powder, shaped, and then sintered at 1150°C to make ceramics. After analysis and testing, the mineral composition of the ceramic material is mullite and cristobalite. Among them, mullite has two phases, one of which is wrapped by cristobalite. The average particle size of the wrapped mullite is 13 nanometers, forming a nanocomposite phase. phase ceramics.
Embodiment 2
[0019] AlCl 3 Hydrolysis, polymerization, preparation of aluminum polyhydroxy complex ion, [Al 13 o 4 (OH) 24 (H 2 O) 12 ] 7+ ion, the ZrCl 4 Hydrolysis, preparation of zirconium polyhydroxy complex ion, [Zr 4 (OH) 8 (H 2 O) 16 ] 8+ . The diatomite is made into a suspension, aluminum polyhydroxyl complex ions and zirconium polyhydroxyl complex ions are added to the suspension, and the polyhydroxyl metal ions enter the pores of the diatomite through stirring to prepare a modified porous structure powder. The modified powder is molded and then sintered at 1150°C to make ceramics. After analysis and testing, the mineral composition of the ceramic material is mullite, zircon, and cristobalite. Mullite and zircon are wrapped by cristobalite. The average particle size of mullite and zircon is 11 nanometers and 9 nanometers. Formation of nano-micron composite ceramics. Compared with mullite ceramics, its strength, wear resistance, toughness and other mechanical properti...
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