摘要:
An aluminum oxide sintered product including a layer phase containing a rare-earth element and fluorine among grains of aluminum oxide serving as a main component, or a phase containing a rare-earth element and fluorine along edges of grains of aluminum oxide serving as a main component. The product includes a phase containing a rare-earth element and a fluorine element among grains of aluminum oxide, the phase not being in the form of localized dots but in the form of line segments, when viewed in an SEM image. The product can be readily adjusted to have a volume resistivity in the range of 1×1013 to 1×1016 Ω·cm, the volume resistivity being calculated from a current value after the lapse of 1 minute from the application of a voltage of 2 kV/mm to the aluminum oxide sintered product at room temperature.
摘要:
An aluminum nitride sintered body is provided, which essentially contains aluminum nitride, 0.4 to 2.5 wt % magnesium and 2.0 to 5.0 wt % yttrium. The aluminum nitride sintered body has an average particle size of not more than 1.0 μm.
摘要:
Carbon or a substance generating a carbon by thermal decomposition is added to prepared material containing aluminum nitride (AlN), an Si source such as silicon nitride (Si3N4) or a silicon oxide (SiO2), and an Eu source such as europium oxide (Eu2O3) or europium nitrate or europium acetate, and the prepared material is reduced in a nitrogen atmosphere, and subsequently fired. SiO2 is capable of converting into silicon nitride by reduction nitriding. Europium nitrate or europium acetate are capable of converting into Eu2O3 during a heat treatment process or converting into europium nitride (EuN) by reduction nitriding.
摘要翻译:将碳或通过热分解产生碳的物质加入到制备的含有氮化铝(AlN)的材料,Si源如氮化硅(Si 3 N 4 N 4)或 氧化硅(SiO 2/2)和Eu源如氧化铕(Eu 2 O 3 O 3)或硝酸铕或乙酸铕, 并将制备的材料在氮气气氛中还原,随后烧制。 SiO 2能够通过还原氮化转化为氮化硅。 硝酸铕或乙酸铕在热处理过程中能够转化为Eu 2 O 3 O 3,或通过还原氮化转化为铕(EuN)。
摘要:
A dense cordierite based sintered body is provided, containing at least 93% by mass of cordierite among crystal components present in the sintered body. The average particle diameter of the particles constituting the sintered body is 2 μm or less.
摘要:
An aluminum nitride ceramic having a low volume resistivity at room temperature and a relatively low samarium content is provided. The aluminum nitride ceramic contains aluminum nitride as a main component and samarium in a converted content, calculated as samarium oxide, of 0.060 mole percent or lower. The aluminum nitride ceramic includes aluminum nitride particles and a samarium-aluminum composite oxide phase having a length of at least 7 μm.
摘要:
A novel aluminum nitride material having a low room temperature volume resistivity is provided. The aluminum nitride material has an aluminum nitride main component and includes at least 0.03 mol % of europium oxide. The aluminum nitride material has an aluminum nitride phase and an europium-aluminum composite oxide phase. An aluminum nitride material also provided having an aluminum nitride main component, wherein a total content of europium oxide and samarium oxide is at least 0.09 mol %. The aluminum nitride material has an aluminum nitride phase and a composite oxide phase containing at least europium and aluminum.
摘要:
An aluminum oxide sintered body is provided, including europium and nitrogen, and plate-like crystals having peaks coinciding with EuAl12O19 in an X-ray diffraction profile are dispersed over a whole sintered body. Such an aluminum oxide sintered body can be obtained by forming a mixed powder containing an alumina powder, a europium compound powder and an aluminum nitride powder into a green body having a predetermined shape, and sintering the green body under a non-oxidizing atmosphere.
摘要翻译:提供了包括铕和氮的氧化铝烧结体,并且在X射线衍射图中具有与EuAl 12 O 19重合的峰的板状晶体分散在整个烧结体上。 这样的氧化铝烧结体可以通过将含有氧化铝粉末,铕化合物粉末和氮化铝粉末的混合粉末形成到具有预定形状的生坯中并在非氧化气氛下烧结生坯而获得。
摘要:
A method for producing an aluminum nitride sintered product according to the present invention includes the steps of (a) preparing a powder mixture that contains AlN, 2 to 10 parts by weight of Eu2O3 with respect to 100 parts by weight of AlN, Al2O3 such that a molar ratio of Al2O3 to Eu2O3 is 2 to 10, and TiO2 such that a molar ratio of TiO2 to Al2O3 is 0.05 to 1.2, but not Sm; (b) producing a compact from the powder mixture; and (c) firing the compact by subjecting the compact to hot-press firing in a vacuum or in an inert atmosphere.
摘要翻译:根据本发明的制造氮化铝烧结产品的方法包括以下步骤:(a)制备包含AlN的粉末混合物,相对于100重量份的AlN,Al 2 O 3为2至10重量份的Eu 2 O 3,使得 Al2O3与Eu2O3的摩尔比为2〜10,TiO 2与TiO 2的摩尔比为0.05〜1.2,而不是Sm; (b)从粉末混合物制备压块; 和(c)通过使压坯在真空或惰性气氛中热压烧结来烧结压块。
摘要:
A method for manufacturing an alumina sintered body of the present invention comprises: (a) forming a mixed powder containing at least Al2O3 and MgF2 or a mixed powder containing Al2O3, MgF2, and MgO into a compact having a predetermined shape; and (b) performing hot-press sintering of the compact in a vacuum atmosphere or a non-oxidizing atmosphere to form an alumina sintered body, in which when a amount of MgF2 to 100 parts by weight of Al2O3 is represented by X (parts by weight), and a hot-press sintering temperature is represented by Y (° C.), the hot-press sintering temperature is set to satisfy the following equations (1) to (4) 1,120≦Y≦1,300 (1) 0.15≦X≦1.89 (2) Y≦−78.7X+1,349 (3) Y≧−200X+1,212 (4).
摘要翻译:本发明的氧化铝烧结体的制造方法包括:(a)将至少包含Al 2 O 3和MgF 2的混合粉末或含有Al 2 O 3,MgF 2和MgO的混合粉末形成为具有预定形状的压块; 和(b)在真空气氛或非氧化性气氛中对压实体进行热压烧结,以形成氧化铝烧结体,其中当MgF2与100重量份的Al 2 O 3的量以X表示时 重量),热压烧结温度由Y(℃)表示,热压烧结温度设定为满足下述式(1)〜(4)1,120≦̸ Y≦̸ 1,300(1)0.15 ≦̸ X≦̸ 1.89(2)Y≦̸ -78.7X + 1,349(3)Y≥-200X + 1,212(4)。
摘要:
An aluminum nitride-based ceramic sintered body is provided, which is manufactured by sintering an aluminum nitride powder comprising aluminum nitride as a main component, carbon in an amount of 0.1 wt % or more to 1.0 wt % or less, and containing oxygen in an amount that is not greater than 0.7 wt %, wherein carbon and oxygen are dissolved in grains of the aluminum nitride powder. The a-axis length of the lattice constant of the aluminum nitride is in a range of 3.1120 Å or more to 3.1200 Å or less, and the a c-axis length of the lattice constant is in a range of 4.9810 Å or more to 4.9900 Å or less. The volume resistivity of the aluminum nitride-based ceramic sintered body at 500° C. is 109 Ω·cm or more.