3results about How to "Sintered dense" patented technology

The invention discloses a method for simultaneously optimizing the squareness and the remanence temperature coefficient of a 2: 17 type samarium-cobalt sintered magnet, and belongs to the technical field of rare earth permanent magnet material preparation. A component Sm < 1-x > RE < x > (CobalFeaCubZrc) z is designed, RE is one or more of Dy, Er, Gd, Tm and other heavy rare earth elements, and a, b, c and x meet the following relations: 0 < = x < = 0.6, 0.1 < = a < = 0.2, 0.06 < = b < = 0.12, 0.02 < = c < = 0.03, and 6.9 < = z < = 7.9. On the basis of a conventional smelting and ingot casting-isothermal annealing-powder preparation-oriented profiling-sintering-solid solution-aging process, an isothermal annealing process is added after smelting and ingot casting: the temperature is raised to 1190-1210 DEG C in a tubular furnace, isothermal annealing is performed for 5-20 hours, heavy rare earth elements are eliminated, and the influence of the stability of a 2: 17H phase on the component uniformity and magnetic performance of a magnet is improved; and substitution sites of heavy rare earth can be increased, and the residual magnetism temperature coefficient is optimized.

The application discloses high calcium expanded clinker which can be continuously produced on a rotary kiln and a preparation method thereof. The high calcium expanded clinker is prepared from raw meal powder of 70-90 parts of limestone, 8-24 parts of lapis lazuli and 2-6 parts of aluminum fluoride by calcining at 1200-1300 DEG C on a rotary kiln. The application uses lapis lazuli which is not easy to decompose and rich in sulfur minerals to replace gypsum commonly used in traditional expanded clinker as a sulfur component. With the aid of the mineralization component of aluminum fluoride, the application reduces the risk of ring formation in the kiln caused by the volatilization and condensation of SO3 generated by the decomposition of gypsum on the basis of providing a sulfur phase station, significantly improves the continuity of the calcination production of the expanded clinker on the rotary kiln, greatly ensures the production quality of the expanded clinker, reduces the sintering heat consumption of the expanded clinker, saves the production cost of the expanded clinker, improves the market competitiveness of the expanded clinker, and has a wide application prospect.

The application provides a full-spectrum complex-phase fluorescent ceramic and a preparation method and application thereof. 1‑x‑y Sr y AlSiN3:xEu (0 1‑x‑a‑b Y a Gd b )3(Al 1‑c Ga c )5O 12 :xCe (0 12 The short-time ceramic sintering and the faster temperature rising and falling rate in the application effectively slow down the grain growth in the ceramic sintering process, and in the short-time sintering process, the nitride powder forms the oxide phase in situ without causing large decomposition or sintering so as to make it invalid. In short, through the short-time high-temperature pulse sintering, the sintering densification of the complex-phase ceramic is promoted, and the nitride phase is avoided from being oxidized in the long-time high-temperature process to cause the sharp drop of the luminous efficiency.