摘要:
PURPOSE: To produce ultrafine metal nitride powder, by introducing and decomposing a specific metal compound and a carbon compound in hot steam, collecting produced mixed aerosol dispersoid, and heating the obtained carbon- containing mixture in a gaseous atmosphere containing nitrogen compound. CONSTITUTION: Air and fuel (e.g. propane) are introduced into the reaction furnace 1 through the duct 2 and the burner 3, respectively, and are burnt to fill furnace 1 with steam-containing hot-gas atmosphere of 600W2,000°C. A decomposable metal compound (e.g. TiCl 4 ) and a decomposable carbon compound (e.g. xylene) are introduced through the nozzle 5 into the furnace 1, and are decomposed to obtain a mixed aerosol dispersoid containing the aerosol of metallic oxide and elemental carbon. The dispersoid is extracted through the duct 6 and cooled, and the obtained carbon-containing mixture is heated in a gaseous atmosphere containing a nitrogen compound (e.g. ammonia) at 700W2,500°C to effect the reduction reaction and the nitridation reaction and obtain the objective metal nitride. COPYRIGHT: (C)1986,JPO&Japio
摘要:
PURPOSE:To produce high-quality nonoxidizing material powder in low cost by feeding raw material powder to the inside of a furnace core pipe under the gaseous atmosphere from one end part of a horizontal type rotary furnace core pipe which is constituted of a carbon pipe and an oxidation-preventive protected pipe. CONSTITUTION:In case of producing ceramic powder of nonoxidizing material by using a synthesizing apparatus 1, raw material is introduced into a feed hopper 13 from an introduction port 12 and fed into the inside of a furnace core pipe 3 by a screw conveyor 15. Thereby raw material powder is moved to the right direction while rotating within the inside of a carbon pipe 8 under the gaseous atmosphere and passed through a reaction zone incorporated within a heating furnace 2. In case of the passing, since the outside peripheral wall of the furnace core pipe 3 is heated, raw material powder is allowed to react and thereby ceramic powder of nonoxidizing material is produced in the inside of the furnace core pipe 3. The product is taken out from a takeout hopper 17 via a takeout pipe 18 and the producing operation is finished.
摘要:
PURPOSE: To obtain flaky nitride ceramics with superior resistance to heat, thermal shock, corrosion, etc. by spraying a molten metallic or metalloid material on the surface of a cooling body, dropping the cooled thin chips before deposition, and nitriding them. CONSTITUTION: An element or a mixture of ≥2 kinds of elements selected from Si, Ti, B, Al, W, Zr, Hf, Nb, Ta, La, Fe, Co, Ni, V, Cr and Mo is melted and sprayed on the surface of a cooling body moving at high speed. The sprayed and cooled flaky material is dropped before it deposits on the surface of the cooling body. The flaky material is then nitrided by contact with a heated nitriding gas. By this method flaky nitride ceramics with superior heat resistance, strength, hardness, wear resistance, etc. is obtd. The average diameter of the ceramic is ≥10 times the thickness. The ceramics is suitable for use as a material for a machine, a structural material, etc. COPYRIGHT: (C)1984,JPO&Japio
摘要:
기판 및 그 위에 배치된 층을 포함하는 적층-기판의 구체 예는 개시되고, 여기서 상기 적층-기판은 낙하 표면상으로 적어도 100㎝의 높이로부터 낙하된 장치로 조립된 경우 파괴를 견딜 수 있다. 상기 적층-기판은 적어도 약 10GPa 또는 적어도 약 20GPa의 경도를 나타낼 수 있다. 상기 기판은 비결정질 기판 또는 결정질 기판을 포함할 수 있다. 비결정질 기판의 예는, 선택적으로 화학적으로 강화된, 유리를 포함한다. 결정질 기판의 예는 단결정 기판 (예를 들어, 사파이어) 및 유리-세라믹을 포함한다. 이러한 적층-기판을 포함하는 제품 및/또는 장치 및 이러한 장치의 제조방법은 또한 개시된다.
摘要:
本発明は、式(I) Ma 2-y (Ca,Sr,Ba) 1-xy Si 5-z Me z N 8 :Eu x Ce y (I)、式中Ma=Li、Naおよび/またはK、Me=Hf 4+ および/またはZr 4+ 、x=0.0015〜0.20およびy=0〜0.15、z<4である、で表される化合物、これらの化合物の製造方法ならびに、蛍光体およびLEDからの青色または近紫外線発光を変換するための変換蛍光物質としての使用に関する。