摘要:
A lead-free piezoelectric element that stably operates in a wide operating temperature range contains a lead-free piezoelectric material. The piezoelectric element includes a first electrode, a second electrode, and a piezoelectric material that includes a perovskite-type metal oxide represented by (Ba1-xCax)a(Ti1-yZry)O3 (1.00≦a≦1.01, 0.02≦x≦0.30, 0.020≦y≦0.095, and y≦x) as a main component and manganese incorporated in the perovskite-type metal oxide. The manganese content relative to 100 parts by weight of the perovskite-type metal oxide is 0.02 parts by weight or more and 0.40 parts by weight or less on a metal basis.
摘要:
The present disclosure generally relates to methods of using active braze techniques on beta-alumina. In some specific embodiments, the present disclosure relates to a method of sealing a portion of beta-alumina electrolyte, insulated collar and metal rings of a sodium-based thermal battery.
摘要:
A monolithic, substantially hermetic joining or bonding of two or more aluminum nitride (“AlN”) ceramic components is made by promoting transient liquid phase sintering near the contact areas between the components. In a first approach, AlN particles are combined with a rare earth oxide sintering additive such as yttrium oxide (Y2O3) in a joining paste can be applied between the joining surfaces of fired ceramic preformed components prior to final firing to weld the components together. In a second approach, the additive is added to green mixture, and the components having different shrinkage aspect ratios are mated and cofired in an atmosphere containing a partial pressure of the additive. The additive encourages wetting and diffusion of the liquid phases present on the surfaces of ceramic interface particles in the contact areas during final firing. Such processes can be used to form complex ceramic structures such as a ceramic susceptor used in integrated circuit fabrication. The components can have a plurality of embedded metallized electronic traces which can be electrically interconnected across the interface between the components.
摘要翻译:通过促进在组件之间的接触区域附近的瞬态液相烧结来制造两个或更多个氮化铝(“AlN”)陶瓷部件的整体,基本上密封的接合或接合。 在第一种方法中,AlN颗粒与稀土氧化物烧结添加剂(例如氧化钇(Y 2 O 3))在接合糊料中组合可以在最终焙烧之前涂覆在烧制的陶瓷预制部件的接合表面之间以将部件焊接在一起。 在第二种方法中,将添加剂加入到绿色混合物中,并且具有不同收缩纵横比的组分在含有添加剂分压的气氛中配合并共烧。 添加剂促进在最终焙烧期间在接触区域中存在于陶瓷界面颗粒表面上的液相的润湿和扩散。 这种方法可用于形成复合陶瓷结构,例如用于集成电路制造的陶瓷基座。 组件可以具有多个嵌入的金属化电子迹线,其可以跨部件之间的界面电互连。
摘要:
There is provided a dielectric composition, including: a base powder including BamTiO3, where 0.995≦m≦1.010; a first subcomponent including 0.1 to 1.0 at % (x) of an oxide or carbonate containing at least one variable-valence acceptor element based on 100 moles of the base powder; a second subcomponent including 0.01 to 3.0 at % (y) of an oxide or carbonate containing at least one fixed valence acceptor element; a third subcomponent including an oxide or carbonate containing cerium (z) at % and at least one other rare-earth element (w) at %, where 0.01≦z≦x+4y and 0.01≦z+w≦x+4y; a fourth subcomponent including at least one of an oxide or carbonate containing at least one of Barium, Calcium, Aluminum, and Silicon and glass containing silicon; and a fifth subcomponent including 0.01 to 10.0 at % of an oxide containing zirconium.
摘要翻译:提供了一种电介质组合物,其包括:包含BamTiO 3的基础粉末,其中0.995 @ m @ 1.010; 包含基于100摩尔基础粉末含有至少一种可变价电子受体元素的氧化物或碳酸酯的0.1至1.0原子%(x)的第一副成分; 包含含有至少一个固定价电子元素的氧化物或碳酸盐的0.01〜3.0at%(y)的第二副成分; 第三副成分包括含有%的铈(z)和至少一种其它稀土元素(w)%的氧化物或碳酸盐,其中0.01 @ z @ x + 4y和0.01 @ z + w @ x + 4y; 包含至少一种含有钡,钙,铝和硅中的至少一种的氧化物或碳酸盐和含有硅的玻璃中的至少一种的第四副成分; 和含有锆的氧化物的0.01〜10.0at%的第五副成分。
摘要:
An electronic device includes a plurality of internal electrode layers and dielectric layers alternately laminated. The particle size of the first dielectric particles contacting one laminating direction end face of the internal electrode layer is larger than the particle size of second dielectric particles contacting another laminating direction end face of the internal electrode layer. A thickness of a first ceramic layer formed by the first dielectric particles is smaller than a thickness of a second ceramic layer formed by the second dielectric particles.
摘要:
Polycrystalline alumina and methods for manufacturing polycrystalline alumina exhibiting improved transmission in the infrared region. In one embodiment, polycrystalline alumina articles are formed by providing a powder of substantially alpha phase alumina having a grain size of up to about 1 μm, dispersing the powder in a liquid to form a slurry comprising powdered solids and liquid, removing excess of the liquid from the slurry to form a body, heating the body to provide a densified body, hot isostatically pressing the densified body under conditions to provide an article having a density of at least about 99.9% of theoretical density, and optionally annealing the article, wherein one or more of the annealing or heating are performed in an inert, dry gas.
摘要:
A method for pressureless sintering of B4C without sintering agents which reduces sintering time without sacrificing relative density, and avoids decomposition of B4C and loss of relative density.
摘要:
A ceramic electronic component includes a ferrite material magnetic body part and a Cu conductive part, the ferrite containing 20 to 48% trivalent Fe in terms of Fe2O3 and divalent Ni. The ferrite can contain Mn so that it is less than 50% of the total of Fe and Mn in terms of Mn2O3 and Fe2O3. The magnetic and conductive parts are co-fired at a pressure not exceeding the equilibrium oxygen partial pressure of Cu—Cu2O thereby ensuring insulating performance and favorable electrical characteristics.
摘要翻译:陶瓷电子部件包括铁氧体材料磁性体部分和Cu导电部分,铁素体以Fe 2 O 3和二价Ni计为20〜48%的三价Fe。 铁素体可以含有Mn,以Mn2O3和Fe2O3计少于Fe和Mn的总和的50%。 在不超过Cu-Cu 2 O的平衡氧分压的压力下共同烧制磁性和导电部件,从而确保绝缘性能和良好的电特性。
摘要:
A dielectric ceramic containing a BaTiO3 based material as its main constituent, and, as accessory constituents, a rare-earth element R(R is at least one selected from Nd, Eu, Gd, Tb, Dy, Ho, Er, Yb, and Y), M (M is at least one selected from Mg, Mn, Ni, Co, Cu, Al, Mo, W, and V), SiO2, and CaO. Among crystal grains included in this dielectric ceramic, the ratio of the number of crystal grains 11 in which Si is present in solid solution is 5% or more.
摘要:
A method for manufacturing an annular nuclear fuel pellet is provided. In the method, an annular nuclear fuel green compact whose lateral cross-section is a trapezoid is prepared. The thickness of the annular nuclear fuel green compact reduces along one direction of the central axis, and a green density of the nuclear fuel green compact increases along one direction of the central axis. The annular nuclear fuel green compact is sintered under a reducing gas atmosphere so that the annular nuclear fuel pellet is obtained. According to this method, the annular pellet which has uniform inner and outer diameters and small diametric tolerances along the pellet height is fabricated without grinding the pellet surfaces.