摘要:
Die vorliegende Erfindung betrifft einen Kupfer-Keramik-Verbund, umfassend - ein Keramiksubstrat, - eine auf dem Keramiksubstrat vorliegende Beschichtung aus Kupfer oder einer Kupferlegierung, wobei das Kupfer oder die Kupferlegierung Korngrößen im Bereich von 10 µm bis 300 µm aufweist.
摘要:
A refractory object can include at least 10 wt % Al2O3. In an embodiment, the refractory object can further include a dopant including an oxide of a rare earth element, Ta, Nb, Hf, or any combination thereof. In another embodiment, the refractory object may have a property such that the averaged grain size does not increase more than 500% during sintering, an aspect ratio less than approximately 4.0, a creep rate less than approximately 1.0×10−5 μm/(μm×hr), or any combination thereof. In a particular embodiment, the refractory object can be in the form of a refractory block or a glass overflow forming block. The glass overflow forming block can be useful in forming an Al—Si—Mg glass sheet. In a particular embodiment, a layer including Mg—Al oxide can initially form along exposed surfaces of the glass overflow forming block when forming the Al—Si—Mg glass sheet.
摘要:
The present inventive (Li, Na, K)(Nb, Ta, Sb)O 3 based piezoelectric material has a sintered body having a surface microstructure comprises microscopic grains having a grain diameter of less than 5 µm, intermediate grains having a grain diameter of 5 µm or more and less than 15 µm, and coarse grains having a grain diameter of 15 µm or more and 50 µm or less, wherein the amount of coarse grains is 3% or more in a share of grains in terms of area. The present piezoelectric material can be manufactured by mixing metal-containing compounds so as to give the above-mentioned formulation, calcining the mixture and then crushing the resultant to obtain a calcined/crushed powder, then keeping temperature constantly at a temperature within a range from 800 to 950°C for a predetermined period of time in a constant temperature keeping process, and raising temperature to firing temperature for sintering.
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 dielectric ceramic is provided having a high relative dielectric constant, and in the case in which it is used for a multilayer ceramic capacitor (1), even when the thickness of a dielectric ceramic layer (3) is decreased, high insulating properties and superior reliability can be obtained. The dielectric ceramic has a composition represented by 100(Ba 1-w-x-m Ca w Sr x Gd m ) k (Ti 1-y-z-n Zr y Hf z Mg n ) 0 3+a + pMnO 2 + qSiO 2 + rCuO, and is used for forming the dielectric ceramic layer (3) of a multilayer ceramic capacitor 1. However, 0.995≤k≤1.010, 0≤w
摘要翻译:提供具有高相对介电常数的电介质陶瓷,并且在用于多层陶瓷电容器(1)的情况下,即使当电介质陶瓷层(3)的厚度减小时,绝缘性能也优异 可以获得可靠性。 电介质陶瓷具有由100(Ba 1-w x m Ca w Sr x Gd m)k(Ti 1-y z n Zr y Hf z Mg n)O 3 + a + pMnO 2 + qSiO 2 + rCuO表示的组成,并且被使用 用于形成多层陶瓷电容器1的介电陶瓷层(3)。然而,0.995‰k‰1.010,0‰w <0.04,0‰x‰0.04,0‰y‰0.10,0‰z‰0.05,0.015‰ ‰0.035,0.015‰‰0.035,0.01‰p‰1.0,0.5‰q‰2.5和0.01‰‰5.0。 另外,a是相对于3的偏差而选择的值,使得主要部件是电中性的。
摘要:
A semiconductor ceramic composition which is a BaTiO 3 based semiconductor ceramic composition, wherein, part of Ba is replaced by at least A (at least one alkali metal element selected from Na and K), Bi and RE (at least one element selected from rare earth elements including Y), and part of Ti is replaced by at least TM (at least one element selected from the group including of V, Nb and Ta), the relationships of 0.7≤ {(the content of Bi) / (the content of A)}≤1.43, 0.017≤{(the content of Bi) + (the content of A)}≤0.25, and 0
摘要:
There is provided a ceramics substrate for mounting a light-emitting element having high thermal conductivity which can achieve high reflectance and which can enhance heat dissipation performance to extend the lifetime of a light-emitting element. A ceramics substrate for mounting a light-emitting element includes a ceramic sintered body, the ceramic sintered body having a mounting section on which a light-emitting element is mounted, in a surface portion on a mounting section side of the ceramic sintered body, a ratio of crystal grains having a crystal grain size of 0.2 µm to 1.0 µm in equivalent circle diameter being in a range of 45% to 80%, a ratio of crystal gains having a crystal grain size of 2.0 µm to 6.0 µm in equivalent circle diameter being in a range of 5% to 15%, and a ratio of crystal grains having a crystal grain size of more than 6.0 µm in equivalent circle diameter being 2.7% or less. Therefore, the reflectance of the ceramics substrate for mounting a light-emitting element (1) can be improved, and a ceramics substrate for mounting a light-emitting element with high thermal conductivity can be produced.