8 results about "Nickel sesquioxide" patented technology

The invention provides a manganese-cobalt-nickel-based MEMS temperature sensor chip and a preparation and packaging method thereof, and the preparation method of the temperature sensor chip comprises the steps: providing a preposed powder material which at least comprises cobalt sesquioxide, manganese dioxide and nickel sesquioxide; mixing the front powder material with an organic solvent to obtain printing slurry of the sensor; a substrate is provided, a pattern is formed through photoetching, an electrode layer is formed on the surface of the substrate, and then the electrode layer is patterned into an interdigital electrode; patterning the printing slurry on an electrically polarized substrate through a patterning process; sintering the substrate with the printing slurry to obtain a sensitive film with an electrode layer; and forming a protective layer above the sensitive film to obtain the manganese-cobalt-nickel-based MEMS temperature sensor chip. According to the invention, the MEMS technology is introduced into the processing process of the negative temperature coefficient temperature sensor chip, the size of the sensor chip can be reduced to a micron level, the miniaturization of the manganese-cobalt-nickel-based temperature sensor can be realized, and the measurement precision of the manganese-cobalt-nickel-based temperature sensor can be improved.

The present invention relates to the field of inorganic synthesis and discloses a method for preparing nickel trioxide nanoparticles based on centrifugal microfluidic technology, comprising: (1) injecting a nickel salt aqueous solution and an alkaline aqueous solution containing an oxidant into a centrifugal microfluidic reactor respectively, and centrifuging them; adopting a clockwise and counterclockwise alternating rotation mode during the centrifugal reaction; (2) collecting the precipitate after the centrifugal reaction, and obtaining nickel trioxide nanoparticles through post-processing. The present invention adopts a new centrifugal microfluidic technology to synthesize nickel trioxide nanoparticles. The method of the present invention not only has high reaction efficiency and can significantly increase the yield; but also can achieve fine control of the particle size and morphology of the nickel trioxide nanoparticles during the preparation process by controlling variables such as rotation acceleration, speed, and time, providing a favorable basis for synthesizing nanoparticles with customized properties.

The invention belongs to the technical field of electronic materials, and particularly discloses a high-dispersion aluminum-doped zinc oxide varistor material and a preparation method thereof. The high-dispersion aluminum-doped zinc oxide varistor material is prepared from the following raw materials in parts by weight: 90 to 92 parts of pretreated zinc oxide, 2 to 3 parts of bismuth trioxide, 0.7 to 0.9 part of cobalt oxide, 1.5 to 1.8 parts of aluminum oxide, 1.2 to 1.5 parts of silicon dioxide, 0.6 to 0.8 part of manganese oxide, 0.07 to 0.09 part of tin oxide and 0.2 to 0.5 part of nickel sesquioxide. The zinc oxide is pretreated, agglomeration of the zinc oxide is reduced, the zinc oxide is subsequently matched with other components, the performance stability of the piezoresistor is improved, the leakage current is reduced, and the service life is prolonged.

A welding flux for precipitation hardening (PH) stainless steel comprises 20-25 wt % of silicon dioxide (SiO2), 20-25 wt % of molybdenum trioxide (MoO3), 20-25 wt % of chromium (III) oxide (Cr2O3), 15-20 wt % of nickel (III) oxide (Ni2O3), 4-8 wt % of aluminum oxide (Al2O3), 4-8 wt % of aluminum nitride (AlN), 4-8 wt % of nickel (II) oxide (NiO) and 4-6 wt % of copper (II) oxide (CuO). By the use of the welding flux for PH stainless steel, together with the tungsten inert gas welding (TIG welding) procedure, a weld bead with a weld D / W ratio greater than or equal to 0.8 can be formed between the two PH stainless steel workpieces. Therefore, the welding flux for PH stainless steel is suitable for single-pass, full penetration welding of the PH stainless steel workpiece with a thickness greater than or equal to 3 mm.

The application belongs to the technical field of electronic materials, and specifically discloses a high-dispersion aluminum-doped zinc oxide voltage-dependent resistor material and a preparation method thereof. The high-dispersion aluminum-doped zinc oxide voltage-dependent resistor material comprises the following raw materials in parts by weight: pretreated zinc oxide 90-92 parts, bismuth trioxide 2-3 parts, cobalt oxide 0.7-0.9 parts, aluminum trioxide 1.5-1.8 parts, silicon dioxide 1.2-1.5 parts, manganese oxide 0.6-0.8 parts, tin oxide 0.07-0.09 parts, and nickel trioxide 0.2-0.5 parts. The pretreated zinc oxide reduces the agglomeration of zinc oxide, and the subsequent cooperation with other components improves the performance stability of the voltage-dependent resistor, reduces the leakage current, and prolongs the service life.

The invention provides a three-dimensional hollow cone array type nano-porous nickel sesquioxide-nickel oxide integrated lithium ion battery negative electrode and a preparation method thereof. The electrode is composed of a nano-porous cone array which grows on the surface of a metal substrate in the vertical direction and has a three-dimensional hollow structure, the metal substrate is mainly made of one of foamed nickel, foamed copper, a copper sheet and a nickel sheet; the cone array is composed of nickel oxide with a hollow nano-porous cone-shaped structure; the nickel oxide is a mixture of nickel sesquioxide and nickel oxide; the nickel oxide is a porous nickel trioxide-nickel oxide shell formed by oxidizing the surface of a three-dimensional nano nickel cone, and finally, nickel elementary substances of a core part are selectively etched to form the three-dimensional hollow cone array type nano porous nickel sesquioxide-nickel oxide lithium ion battery negative electrode. The method provided by the invention integrates the advantages of volume expansion inhibition of the hollow array structure and high theoretical capacity of the nickel oxide, and combines the three-dimensional nano porous structure, so that the lithium storage performance of the negative electrode of the lithium ion battery is improved.

To provide a precipitation hardening stainless steel flux for solving a problem with poor aspect ratio of weld beads formed between two precipitation hardening stainless steel work-pieces.SOLUTION: A precipitation hardening stainless steel flux contains: silicon dioxide of 20 to 25%; molybdenum trioxide of 20 to 25%; chrome oxide of 20 to 25%; nickel trioxide of 15 to 20%; aluminum oxide of 4 to 8%; aluminum nitride of 4 to 8%; nickel oxide of 4 to 8%; and copper oxide of 4 to 6%.SELECTED DRAWING: Figure 2

The application relates to a preparation method of a carbon nanotube doped with nickel trioxide, and steps include: firstly, ultrasonic treatment of carbon nanotubes for 20-40 minutes, then adding the carbon nanotubes into a mixed solution composed of concentrated sulfuric acid and concentrated nitric acid, and ultrasonic stirring reaction for 3-5 hours; then, adding hydrogen peroxide and potassium permanganate into the reaction product after ultrasonic treatment in step (1), and continuing to stir for 1-3 hours, filtering, and taking out after freeze drying overnight; dispersing the oxidized carbon nanotubes treated in step (2) in ultrasonic treatment for 20-40 minutes, then adding an aqueous solution of nickel nitrate hexahydrate, and ultrasonic treatment for 20-40 minutes, then adding a sodium hydroxide sodium hypochlorite solution, and stirring for 1-3 hours to obtain a black colloidal suspension, and filtering and drying to obtain a carbon nanotube doped with nickel trioxide; the application has the advantages of being capable of increasing the electron conduction capacity so as to improve the catalytic efficiency, and effectively reducing the agglomeration of nanoparticles.