33 results about "Erosiveness" patented technology

An erosion resistant surface using a dense array of elastic whiskers to slow the velocity of erosive particles before impacting with the surface. A carbon nanotube forest is grown on the surface to provide the erosion resistance. In the alternative, a carbon nanotube forest is grown on a flexible substrate that is bonded to the surface.

The present invention provides a fluorophosphate glass containing phosphorus, oxygen and fluorine as glass ingredients, in which, provided that a refractive index nd of the glass is nd(1) and a refractive index nd after re-melting the glass at 900 DEG C for 1 hour in a nitrogen atmosphere, cooling the glass to a glass transition temperature and then cooling the glass down to 25 DEG C at a temperature decrease rate of 30 DEG C per hour is nd<(2)>, an absolute value of a difference between nd<(1)> and nd<(2)> (nd<(2)>-nd<(1)>) is equal to or less than 0.00300, and a molar ratio (O<2-> / P<5+>) of a content of O<2-> to a content of P<5+> is equal to or more than 3.5. The glass of the invention is reduced in volatility and erosiveness.

The present invention provides a fluorophosphate glass containing more than 3 cationic % and 30 cationic % or less of a phosphorus ingredient in terms of P5+, the glass having a ratio I(1) / I(0) of equal to or less than 0.08 in which I(0) is a strength of a resonance peak generated near a reference frequency of 31P in a nuclear magnetic resonance spectrum and I(1) is a strength of a first-order side band peak of the resonance peak. The glass of the invention is reduced in volatility and erosiveness.

The invnetion provides fluoroposphate glass, precision press molding preform, optical element blank, optical element and method of manufacturing the same. A fluorophosphate glass of the invention contains more than 3 cationic % and 30 cationic % or less of a phosphorus ingredient in terms of P<5+>, the glass having a ratio I(1) / I(0) of equal to or less than 0.08 in which I(0) is a strength of a resonance peak generated near a reference frequency of <31>P in a nuclear magnetic resonance spectrum and I(1) is a strength of a first-order side band peak of the resonance peak. The glass of the invention is reduced in volatility and erosiveness.

The invention discloses a high strength acid resistant refractory brick which comprises the components with weight percentages as follows: 50-70% of Guizhou kaolin, 15-20% of Jiepai mud, 15-35% of fused quartz, 3-6% of talcum powder and 3-5% of powdered alumina. The invention aims at overcoming the shortcomings in the prior art and providing a high strength acid resistant refractory brick which is high temperature resistant, chilling resistant, good in strong acid erosiveness resistance and environment-friendly. The invention has another aim of providing a method for preparing the high strength acid resistant refractory brick.

The invention provides a stemming utilizing a waste refractory material and a preparation method thereof. The stemming comprises the following raw materials: silicon carbide particles or fine powder, high-temperature fine asphalt powder, Jilin fine clay powder, coke particles, industrial grade corundum particles or fine powder, wherein recovered aluminum and magnesium material particles or fine powder used for an electric furnace is added; and tar serves as a bonding agent. The preparation method comprises the following steps of: preparing the raw materials according to a proportion; after uniformly stirring particle materials in a stirring machine for 1 to 10 minutes, adding 20 to 30 percent of the tar; stirring for 5 to 10 minutes; adding fine powder materials; stirring for 5 to 15 minutes; adding the remaining tar and stirring for 25 to 40 minutes; and extruding by using a stemming extruder and packaging. The stemming has the following advantages: high operating performance, low stemming sintering shrinkage, rapid sintering property, high scour resistance and slag iron erosiveness. The invention provides a way for regenerating and utilizing the waste refractory material, and contributes to saving resources and protecting environment.

The present invention provides a fluorophosphate glass containing 30 to 50 cationic % of a phosphorus ingredient in terms of P5+, the glass having, in a nuclear magnetic resonance spectrum, a resonance spectrum which is generated near a reference frequency of 31P and has a shape of Gaussian function. The glass of the invention is reduced in volatility and erosiveness.

The invention discloses a composite slag weir and a preparation method thereof; and a body of the slag weir is integrally and tightly connected by an upper slag baffling part and a lower molten steel baffling part. The upper slag baffling part is manufactured by aluminum and magnesium materials; and the lower molten steel baffling part is manufactured by magnesium materials. Based on the situations that the lower part of the body of the slag weir is mainly contacted with the molten steel with more assuasive erosiveness; while the upper part of the body of the slag weir is mainly contacted with the slag with stronger erosiveness, the magnesium materials with common corrosion resistance as well as the aluminum and magnesium materials with stronger corrosion resistance are respectively adopted as the manufacturing materials for the upper slag baffling part and the lower molten steel baffling part of the slag weir, and the upper part and the lower part of the body of the slag weir of different materials are organically connected into a whole through a preparation technique. The composite slag weir reasonably uses durable goods resources, which not only guarantees the slag weir not to generate pollution to the molten steel, but also greatly prolongs the service life of the slag weir, simultaneously, the service life of the upper part and the lower part of the slag weir is led to bebasically synchronous, thus most economically using the slag weir and effectively reducing the production cost.

The invention relates to a microporous graphite silicon carbide brick and belongs to the field of refractory material for iron making blast furnace. The microporous graphite silicon carbide brick is prepared from main raw materials of SiC, Si, Ti and pyrolytic graphite and a binder of modified phenol-formaldehyde resin through steps of pugging, die vibration forming, low temperature baking, immersion and high temperature sintering. The brick has excellent thermal conductivity, alkali resistance, inoxidizability, slag erosiveness, small average aperture and apertures with an aperture larger than 1 mum having a volume no more than 4%, and suits for bosh, belly, middle and lower part of a large blast furnace. Besides, the brick has a long service life and substantial economic benefits.

The invention belongs to an acid-resisting complex phase ceramic coating and a preparation method thereof. Firstly, 2-5 wt% of adhesive and 2-4 wt% of dispersing agent are prepared into concentrated solution, and then 25-30 wt% of water is added to prepare premixing solution; alumina, silica and silicon carbide micro powder are mixed at ratio and are added into premixing solution and the mixture is carried out ball milling for 2 hours; 0.5-1 wt% of catalyst is added for ball milling for 0.5 hour; after slurry viscosity is suitable, the slurry is brushed or sprayed by a spray gun on the surface of materials, such as cement, concrete and the like to form an even coating; and after heat treatment, Al2O3 / SO2 / SiC series anti-reversion complex phase ceramic coating is obtained. The complex phase ceramic coating not only can be applied on the surface of cement, concrete and the like, but also can be used for the anti-corrosion of metal surface. The coating surface is even and compact, has nocracks and has favorable abrasion performance and favorable acid resistant erosiveness.