38 results about "Base Ratio" patented technology

Disclosed is a Corson alloy having dramatically improved properties (e.g., high strength and high conductivity) which are achieved by allowing the effect of the addition of Cr to a Cu-Ni-Si-based alloy to exhibit more effectively. Specifically disclosed is a copper alloy for an electronic material, which comprises 1.0 to 4.5 mass% of Ni, 0.50 to 1.2 mass% of Si, 0.0030 to 0.3 mass% of Cr (providedthat the weight-based ratio of Ni to Si (i.e., a Ni / Si ratio) by weight is as follows: 3 = Ni / Si = 5.5), with the remainder being Cu and unavoidable impurities. In the copper alloy, a Cr-Si compoundhaving a size of 0.1 to 5 ¢mu!m (inclusive) is dispersed in the material at a dispersion density of 1 10<6> particles / mm<2> or less, wherein the atom-based ratio of the concentration of Cr to that ofSi in the dispersed particle is 1 to 5.

The invention discloses a preparation method for coal water slurry with optimizing gradation, low energy consumption and high concentration. The preparation method includes the steps that (1) coarse powder and fine powder are prepared, wherein the coarse powder is prepared from breaking coal through a crusher and sieving through a sieve of 14 mesh; coal water slurry with a concentration of 40-60% is produced by a ball milling machine, and the coal water slurry with the average grain diameter of less than 30 micrometers is used as the fine powder; (2) the coarse powder and fine powder prepared by the step (1) are mixed according to the dry base ratio of 1-3:1 to form the mixture, and by adding water and coal slurry additives to the mixture, the coal water slurry with a viscosity of 500-1500 mPa.S is prepared. The preparation method can greatly improve the concentration of the coal water slurry, and meet the requirements of the gasification slurry preparation, and meanwhile, the preparation of the coarse particles which directly adopts the crushing process with high efficiency, has a good effect of energy saving. The preparation method has the advantages that the slurry preparation process is simple; the energy consumption is low; coal kinds for slurry preparation are widened, and the coal water slurry concentration is remarkably improved; the preparation method has a good industrial application prospect.

Disclosed is a powdery pesticidal composition which comprises a mixture of a coated pesticide comprising a powdery pesticide coated with a thermosetting resin and having a volume median diameter of 10 to 150 μm and a calcium carbonate micropowder having a bulk density of 0.6 g / ml or less, wherein the weight-based ratio of the coated pesticide to the calcium carbonate micropowder is 100:1 to 100:30. The powdery pesticidal composition has good fluidability.