74 results about "Bismuth carbonate" patented technology

The present invention provides grease which prevents frictional wear on a lubricating surface and excellent in performance of preventing occurrence of flaking, heat-resistant performance, and long-term durability, a grease-enclosed rolling bearing, a constant velocity joint, and rolling parts. Grease is composed of base grease, essentially containing a thickener, to which at least 0.01 to 15 wt % of one substance selected from among bismuth and inorganic bismuth compounds is added. The inorganic bismuth compounds are at least one inorganic bismuth selected from among bismuth sulfate, bismuth trioxide, bismuth carbonate, and sodium bismuthate. The above-described grease is used for the rolling bearing and the constant velocity joint. A coating film of at least one substance selected from among the bismuth and the inorganic bismuth is formed on surfaces of the rolling parts.

The invention relates to a method for preparing a bismuth-series chemical product, comprising steps as follows: firstly, preparing ordinary-level bismuth oxide by refined bismuth; then preparing a bismuth-series chemical product by the ordinary-level bismuth oxide including steps of refined bismuth pulverization, bismuth low-temperature oxidation, ordinary bismuth oxide chemical conversion, and the like; finally preparing bismuth-series chemical products of bismuth nitrate, bismuth subnitrate, bismuth subcarbonate, bismuthsalicylate, basic bismuth salicylate, bismuth citrate, bismuth trichlor, bismuth oxychloride, electric bismuth oxide or bismuth oxide nanowire, and the like; and recycling chemically-converted mother-liquid. The invention has the advantages of generating no cancerigenic poison gas NOx and waste water, having environment protection, little consumption of chemical reagent, little energy consumption, low cost, simple device and operation, and the like.

Provided is a graphite-phase carbon nitride photocatalyst modified by basic bismuth carbonate. The graphite-phase carbon nitride photocatalyst comprises the chemical components of: in percent by mass,0.1-1.5% of basic bismuth carbonate and the balance graphite-phase carbon nitride, and the preparation method of the graphite-phase carbon nitride photocatalyst modified by the basic bismuth carbonate mainly comprises the steps of: adding 5-20 mg of bismuth citrate into every 30 g of urea, putting the urea and bismuth citrate into an agate mortar, performing full stirring, grinding and mixing for20 minutes, placing the obtained mixture in an alumina porcelain ark, then placing the porcelain ark in a muffle furnace for heat treatment, raising the temperature from a room temperature to 450-600DEG C at a heating rate of 2-30 DEG C per minute, performing thermal insulation for 1-2 hours, cooling to room temperature with the furnace, placing the obtained mixture in the agate mortar again, and grinding the mixture thoroughly into powder of 1-5 mum so as to obtain the graphite-phase carbon nitride photocatalyst modified by the basic bismuth carbonate. The graphite-phase carbon nitride photocatalyst has a preparation method with simple and easy operation, easily available raw materials, stable physical and chemical properties, environmental friendliness and high photocatalytic activity,and is beneficial to practical application and industrial production.

A carbon oxide sensor having high sensitivity capable of reduction of influence of humidity is provided. A detection electrode and a counter electrode are provided on one side of an electrolyte, respectively. The detection electrode contains a metal oxide and a metal carbonate including plural components. The metal carbonate preferably contains a first component of alkali metal carbonate and a second component of at least one element selected from the group consisting of alkali earth metal carbonate, transition metal carbonate, zinc carbonate, cadmium carbonate, indium carbonate, lead carbonate and bismuth carbonate. Specifically, it is preferable to contain the first component including Li2CO3 and the second component including at least one element selected from the group consisting of BaCO3, CaCO3 and SrCO3.

The invention relates to a bismuth subcarbonate / sepiolite composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: dissolving cetyltrimethylammonium bromide (CTAB) in ethylene glycol (EG) to prepare a CTAB-EG solution serving as a template agent and a reducing agent, adding a bismuth nitrate-ferric nitrate solution, adjusting the pH value of the mixed solution by using a strong alkali solution, adding purified sepiolite, fully conducting mixing, transferring the treated system into a polytetrafluoroethylene autoclave, and carrying out hydrothermal reaction to generate the porous bismuth subcarbonate / sepiolite composite photocatalyst with controllable morphology. EG or CTAB is oxidized and decomposed under a hydrothermal condition to generate carbonate, and bismuth subcarbonate is loaded and grown on sepiolite under the combined action of the surface activity and template action of CTAB and the interfacial effect of sepiolite, so that the structure and morphology of the bismuth subcarbonate can be effectively controlled, the recombination rate of an energy band gap and a photon-generated carrier is reduced, and the absorption and utilization rate of visible light and the adsorption performance on organic matters are improved, so that the photocatalytic degradation performance and the mineralization capability are improved.