摘要:
Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula (Bai-αMα)A(Ti1-βMnβ)BO3 and having hexagonal structure wherein an effective ionic radius of 12-coordinated “M” is −20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Ba2+ and the A, B, α and β satisfy relations of 0.900≦(A/B)≦1.040, 0.003≦α≦0.05, 0.03≦β≦0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, Mn3O4 and/or Cr2O3, CuO, Al2O3, rare earth element oxide and glass component including SiO2. According to the present invention, it can be provided the hexagonal type barium titanate powder and dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing high specific permittivity, having advantageous insulation property and sufficient reliability.
摘要翻译:介电陶瓷组合物包括六方晶系钛酸钡作为主要成分,由通式(Bai-αMα)A(Ti1-&bgr; Mn&bgr))BO3表示,并具有六方结构,其中12配位“M”的有效离子半径为 相对于12配位Ba2 +和A,B,α和bgr的有效离子半径为-20%以上至+ 20%以下。 满足0.900&nlE的关系;(A / B)≦̸ 1.040,0.003≦̸α≦̸ 0.05,0.03≦̸&bgr≦̸ 0.2,作为副成分,对于主要成分,碱土金属氧化物的某些含量 MgO等,Mn 3 O 4和/或Cr 2 O 3,CuO,Al 2 O 3,稀土元素氧化物和包含SiO 2的玻璃成分。 根据本发明,可以提供六方晶系的钛酸钡粉末和电介质陶瓷组合物,该六方晶系钛酸钡粉末和电介质陶瓷组合物优选用于制造具有高比介电常数的诸如电容器等的电子部件,具有有利的绝缘性和足够的可靠性。
摘要:
A formation of internally nucleated glass ceramics articles that can be heated in the 1350-1450° C. range for extended periods of time without significant deformation or change in shape is disclosed. The predominant crystal phase of these glass ceramics is celsian (BaAl2Si2O8) or its strontium equivalent (SrAl2Si2O8), or solid solutions or mixtures of these compositions, all belonging to the feldspar mineral group.
摘要翻译:公开了可以在1350-1450℃范围内加热的内部有核的玻璃陶瓷制品的延长时间段的形成,而没有显着的变形或形状变化。 这些玻璃陶瓷的主要结晶相是贝氏体(BaAl 2 Si 2 O 8)或其等价锶(SrAl 2 Si 2 O 8),或这些组合物的固体溶液或混合物,均属于长石矿物组。
摘要:
A formation of internally nucleated glass ceramics articles that can be heated in the 1350-1450° C. range for extended periods of time without significant deformation or change in shape is disclosed. The predominant crystal phase of these glass ceramics is celsian (BaAl2Si2O8) or its strontium equivalent (SrAl2Si2O8), or solid solutions or mixtures of these compositions, all belonging to the feldspar mineral group.
摘要翻译:公开了可以在1350-1450℃范围内加热的内部有核的玻璃陶瓷制品的延长时间段的形成,而没有显着的变形或形状变化。 这些玻璃陶瓷的主要结晶相是贝氏体(BaAl 2 Si 2 O 8)或其等价锶(SrAl 2 Si 2 O 8),或这些组合物的固体溶液或混合物,均属于长石矿物组。
摘要:
The invention relates to a light emitting device comprising a light source, especially a LED, and a luminescent material, which is a ceramic multiphase material essentially of the composition M2−zCezSi5−x−y−(z−z1)Ay+(z−z1)N9−4x−y+z1O4x+y−z1. This material has been found to have a composition of at least two phases, which leads to a better producibility as well as photostability and conversion efficiency
摘要:
An illumination system comprising a radiation source and a monolithic ceramic luminescence converter comprising a composite material of at least one luminescent compound, and at least one non-luminescent compound, wherein the material of the non-luminescent compound comprises silicon and nitrogen, is advantageously used, when the luminescent compound comprises an rare-earth metal-activated host compound also comprising silicon and nitrogen. Shared chemical characteristics of the luminescent compound and the non-luminescent material improve phase assemblage, thermal and optical behavior. The invention relates also to a composite monolithic ceramic luminescence converter.
摘要:
This invention pertains to a composite of Spinel and BGG glass substrates and to process for bonding Spinel to BGG glass. The composite includes a Spinel and a BGG glass bonded together and having transmission in the visible and mid-infrared wavelength region. The process includes the step of heating them together above the softening temperature of the BGG glass, the composite having excellent, i.e., typically in excess of about 80%, transmission in the 0.5-5 wavelength region.
摘要:
An illumination system comprising a radiation source and a composite monolithic ceramic luminescence converter comprising a composite luminescent material comprising at least one first phosphor and at least one second phosphor capable of absorbing a part of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light provides improved light mixing and chromaticity control of the emitted light mixture. The invention relates also to a composite monolithic ceramic luminescence converter and a method of manufacturing such composite monolithic ceramic luminescence converter.
摘要:
An electrostatic chuck that is a member for a semiconductor-manufacturing apparatus contains an yttrium oxide material containing first inorganic particles and second inorganic particles. The first inorganic particles form solid solutions in yttrium oxide, can be precipitated from yttrium oxide, and are present in grains of yttrium oxide. The second inorganic particles can form solid solutions in the first inorganic particles, are unlikely to form any solid solution in yttrium oxide, and are present at boundaries between the yttrium oxide grains. The first inorganic particles contain at least one of ZrO2 and HfO2. The second inorganic particles contain at least one selected from the group consisting of MgO, CaO, SrO, and BaO. The yttrium oxide material is produced in such a manner that solid solution particles are prepared by mixing and firing the first and second inorganic particles and are mixed with yttrium oxide and the mixture is fired.
摘要:
A silicon nitride substrate having appropriately adjusted warpage and surface roughness can be obtained by mixing magnesium oxide of 3 to 4 wt % and at least one kind of rare-earth element oxide of 2 to 5 wt % with silicon nitride source material powder to form a sheet-molded body, sintering the sheet-molded body, and performing a heat treatment at a temperature of 1,550 to 1,700 degree C. with a pressure of 0.5 to 6.0 kPa with a plurality of substrates being stacked. Also, a silicon nitride circuit board and a semiconductor module using the same are provided.
摘要:
A semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region is attached to a compound substrate including a host which provides mechanical support to the device and a ceramic layer including a luminescent material. In some embodiments the compound substrate includes a crystalline seed layer on which the semiconductor structure is grown. The ceramic layer is disposed between the seed layer and the host. In some embodiments, the compound substrate is attached to the semiconductor structure after growth of the structure on a conventional growth substrate. In some embodiments, the compound substrate is spaced apart from the semiconductor structure and does not provide mechanical support to the structure. In some embodiments, the ceramic layer has a thickness less than 500 μm.