72 results about "Zirconium titanate" patented technology

The invention discloses treatment solution for preparing an aluminum alloy surface amorphous composite passivation film, a preparation method and application. A formula of the treatment solution comprises 5 to 15g / L of corrosion inhibiting negative ion-containing rare earth salt, 3 to 10g / L of catalyst type composite oxidant, 1 to 3g / L of auxiliary oxidant, 0.1 to 0.5g / L of buffering film-forming accelerator and 0.5 to 1.5g / L of composite stabilizer. The treatment solution does not contain any toxic chromium or organic substances, does not need heating during conversion treatment of 2 to 5 minutes, and can prepare the golden amorphous 'rare earth-manganese' composite passivation film with excellent performance on the aluminum alloy surface. The treatment solution well solves environmental pollution and human harm caused by the present hexavalent chromium treatment, and can overcome the defects that a zirconium titanate series conversion film is colorless and field judgment cannot be realized. The preparation method has the advantages of simple process, simple and convenient operation and low cost, and is easy to realize industrialization.

The invention belongs to the technical field of chemical materials and discloses an anticorrosion treatment process for converting / electro-statically spraying environment-friendly zirconium titanate on surfaces of aluminum alloys. The anticorrosion treatment process comprises the following steps: (1) carrying out surface pretreatment on the aluminum alloys; (2) converting the surfaces of the aluminum alloys, putting the aluminum alloys subjected to surface pretreatment into a zirconium titanate converting solution, soaking, washing, standing and drying the aluminum alloys to obtain conversion films; (3) suspending the dried aluminum alloys in a powder spraying room and electro-statically spraying organic powder on the aluminum alloys; and (4) standing, preserving heat at 180-200 DEG C, then cooling to obtain anticorrosion coatings. According to the anticorrosion treatment process, the conversion treatment is low in film-forming temperature and short in film-forming time; the zirconium titanate treatment solution is stable, chromium-free and environmentally-friendly; through the treatment process, the surfaces of the aluminum alloys are high in corrosion resistance; the conversion films are excellent in combination with the aluminum alloys and the organic coatings.

Disclosed is a method for making amorphous spherical particles of zirconium titanate and crystalline spherical particles of zirconium titanate comprising the steps of mixing an aqueous solution of zirconium salt and an aqueous solution of titanium salt into a mixed solution having equal moles of zirconium and titanium and having a total salt concentration in the range from 0.01 M to about 0.5 M. A stearic dispersant and an organic solvent is added to the mixed salt solution, subjecting the zirconium salt and the titanium salt in the mixed solution to a coprecipitation reaction forming a solution containing amorphous spherical particles of zirconium titanate wherein the volume ratio of the organic solvent to aqueous part is in the range from 1 to 5. The solution of amorphous spherical particles is incubated in an oven at a temperature ≦100° C. for a period of time ≦24 hours converting the amorphous particles to fine or ultrafine crystalline spherical particles of zirconium titanate.

The invention relates to a dielectric adjustable magnesium oxide and barium zirconium titanate composite ceramic, which is technically characterized in that: the chemical general formula of the magnesium oxide and barium zirconium titanate composite ceramic is BaZr0.25Ti0.75O3; the magnesium oxide and barium zirconium titanate composite ceramic is prepared by a ceramic preparation process; and at the room temperature and the frequency of 10kHz, the dielectric constant (672) of the ceramic is proper by component optimization, and low dielectric loss (0.0016) and high tuning rate (30 percent) are kept, so the magnesium oxide and barium zirconium titanate composite ceramic can meet the using requirement of a ferroelectric phase shifter, and the formula and the preparation method of the ceramic are suitable for industrialized popularization and large-batch production.

The invention provides a method for treating reverse osmosis concentrated water. In the method, the process flows of a laminated filter, heterogeneous catalytic ozone oxidation reaction, an ozone destruction tower and a biochemical reaction tank are adopted. The method comprises the following steps of: adding sodium hypochlorite into the reverse osmosis concentrated water produced in the recycling process of oil refining production wastewater subjected to biochemical treatment and membrane process treatment, sterilizing, filtering by using the laminated filter, fully mixing with ozone, addinginto a reactor filled with a zirconium titanate catalyst and performing ozone oxidation; and performing biochemical treatment by using a biochemical reactor with special biological bacteria, wherein the chemical oxygen demand (COD) of effluent after the reverse osmosis concentrated water is treated is below 60mg / L.

The invention relates to a method for preparing zirconium titanate by an oil-water interface process, which comprises the following steps: (1) under room temperature conditions, dropwisely adding a zirconium oxychloride solution and tetrabutyl titanate into a sodium oleate water solution, adding cyclohexane, and stirring to obtain a mixed solution; (2) pouring the mixed solution into a reaction kettle, adding a NaOH solution to regulate the pH value, keeping the oil-water ratio at 1:1, reacting at 160-180 DEG C for 24-18 hours, washing, separating the oil phase, washing, centrifuging, drying to obtain a primary product, and roasting to obtain the zirconium titanate ZrTiO4. The method is simple to operate, and has the characteristics of favorable repetitiveness, controllable reaction conditions, lower temperature requirements and the like.

The invention relates to fine-particulate zirconium titanates or lead zirconium titanates and a method for production thereof by reaction of titanium dioxide particles with a zirconium compound or a lead and zirconium compound. The titanium dioxide particles have a BET surface of more than 50 m2 / g. The lead zirconium titanates can be used for the production of microelectronic components.

The invention relates to a flue gas denitration integral type catalyst using a titanium-based ceramic as a carrier and a preparation method thereof. The invention is characterized in that the titanium-based ceramic is used as a first carrier, a zirconium titanate composite metal oxide is used as a second carrier, and CeO2 which is added with proper amounts of doped metal oxides is used as an active constituent. The quality of the first carrier is used as a benchmark, wherein the load content mass percentage of the zirconium titanate composite metal oxide is 2.5 to 40wt percent and the load content mass percentage of the CeO2 and the doped metal oxides which is used as the active constituent is 1 to 25wt percent. The adopted preparation method is to impregnate the Ce salt and the doped metal salt composite solution to prepare an active catalytic component coating after impregnating the titanium-based ceramic with a zirconium titanate composite sol and being roasted driedly to prepare acarrier coating. Compared with the prior art, the flue gas denitration integral type catalyst and the preparation method thereof not only improve the activity of the catalyst and expand a window of activity temperature in a low temperature, but also improve mechanicalness and the heat stability of the catalyst carrier. The flue gas denitration integral type catalyst and the preparation method areenvironmental protection, without a secondary pollution and reduce the loading of the active constituent.

The present invention provides a cordierite ceramic containing at least either of zirconium oxide and hafnium oxide and also containing titanium oxide, wherein the molar ratio of zirconium (Zr), hafnium (Hf) and titanium (Ti) in terms of the moles in the form of the dioxides, respectively which is given by the formula [(ZrO2+HfO2) / TiO2] is in a range of 0.1 to 5; and a honeycomb structure made of the cordierite ceramic. In this cordierite ceramic, the phases of the above components are contained mainly as zirconium titanate or hafnium titanate, and there occurs no heterogeneity in appearance, caused by change in color and generation of spots or the like.

A lead-lanthanum-zirconium-titanate (PLZT) capacitor on a substrate formed of glass. The first metallization layer is deposited on a top side of the substrate to form a first electrode. The dielectric layer of PLZT is deposited over the first metallization layer. The second metallization layer deposited over the dielectric layer to form a second electrode. The glass substrate is advantageous as glass is compatible with an annealing process used to form the capacitor.