摘要:
A piezoelectric ceramic composition comprising: a matrix material comprising at least two matrix components having a perovskite structure or consisting of said matrix components; a first matrix component being selected from (Bi0.5A0.5)EO3 and BaEO3; and a further matrix component being Bi(Me0.5E0.5)O3, wherein A is selected from an alkali metal, particularly sodium or potassium, or a mixture of alkali metals; wherein E is independently selected from titanium, zirconium and mixtures of titanium and zirconium; and wherein Me is selected from bivalent metals.
摘要:
Ceramic dielectric materials that can be utilized as electronic components, such as dielectric resonators are disclosed. The material can have a formula Ba12M′(28+a/3)Ti(54−a-b)M″aGebO162, wherein M′ is at least one rare earth element selected from the group consisting of lanthanum, neodymium, samarium, gadolinium, and yttrium, M″ is at least one element selected from the group consisting of aluminum, gallium, chromium, indium, scandium, and ytterbium, 0≦a≦6, and 0≦b≦3. The ceramic dielectric material can also have a formula Ba12M′(28+2x/3)Ti(54−x−y)M′″xGeyO162, wherein M′ is at least one rare earth element selected from the group consisting of lanthanum, neodymium, samarium, gadolinium, and yttrium, M′″ is at least one metal selected from the group consisting of magnesium, zinc, nickel, and cobalt, 0≦x≦3, and 0≦y≦3. One or more aspects of the present invention pertain to methods of fabricating a dielectric component. Methods of synthesizing the disclosed ceramic dielectric materials are also disclosed.
摘要:
A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25-35 and a quality factor (Qxf) of 6,000-20,000 GHz. The composition comprises 3-16 wt % of K2O-Na2O-Li 2O-B2O3-SiO2 system glass frit and 84-97 wt % of BaO-TiO2 system dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.
摘要翻译:可以在低于900℃的温度下烧制的电介质组合物。电介质组合物的介电常数为25-35,质量因子(Qxf)为6,000-20,000GHz。 该组合物包含3-16重量%的K 2 O-Na 2 O-Li 2 O 2 O 2 O 3-SiO 2系统玻璃料和84-97重量%的BaO-TiO 2系统电介质陶瓷。 该组合物可以有效地应用于构成陶瓷多层包装的一部分作为诸如滤波器或天线等的谐振器形式。
摘要:
A ceramic material suitable for use as a microwave band filter for telecommunications equipment comprises oxides of titanium, barium, neodymium, samarium, and optionally, bismuth, and containing, on an elemental weight basis: about 28 to about 31 weight % titanium, about 19 to about 21 weight % barium, about 11 to about 18 weight % samarium, about 7 to about 13 weight % neodymium, up to about 3 weight % of bismuth, and the remainder substantially being oxygen. The ceramic compositions have a resonant frequency, f, in the range of about 2000 MHz to about 2300 MHz, a quality factor, Q, of at least about 4000, a dielectric constant, K, in the range of about 50 to about 70, and a temperature coefficient of resonant frequency, Tf, in the range of about 0 ppm to about null20 ppm. Calcined metal oxide powders useful for preparing the microwave ceramic materials, a method of making the ceramic materials, and devices containing the ceramic materials are also described.
摘要:
A multilayered ceramic substrate is produced by laminating and sintering insulating ceramic layers and one or more dielectric ceramic layers. The insulating ceramic layer is composed of a BaO—Al2O3-SiO2 low temperature sintering ceramic material. The dielectric ceramic layer is composed of a dielectric ceramic material containing a dielectric ceramic component represented by BaO—TiO2-(Nd1—mMem)O{fraction (3/2)} wherein Me is a lanthanoid and 0≦m≦1.0, and a glass component of about 20.0 to 65.0 mole percent of barium oxide, about 5.0 to 50.0 mole percent of silicon oxide and about 10.0 to 50.0 mole percent of boron oxide.
摘要:
A dielectric porcelain composition according to the present invention is composed of a main component expressed in a general formula of xBaO·y((1−t)Nd2O3·tSm2O3)·zTiO2, where 6≦x≦23, 13≦y≦30, 64≦z≦68, 0≦t
摘要翻译:根据本发明的电介质瓷组合物由通式xBaO.y((1-t)Nd2O3.tSm2O3)·zTiO2表示的主要成分组成,其中6≤x≤23,13≤y <= 30,64 <= z <= 68,0 <= t <1,x + y + z = 100。 主成分含有以CuO计的0.1〜3.0重量%的Cu氧化物和2.0〜10重量%范围的玻璃组成的亚成分。 此外,玻璃组合物的90重量%以上是选自SiO 2,B 2 O 3,MgO,BaO,SrO,ZnO和CaO中的至少一种,其含量为:5重量%≤SiO2 <= 15重量% 15wt%<= B2O3 <= 25wt%; 50重量%<=(MgO + BaO + SrO + ZnO + CaO)<= 80重量% 90重量%<=(SiO 2 + B 2 O 3 + MgO + BaO + SrO + ZnO + CaO)≤100重量%。
摘要:
A dielectric ceramic composition which has a high dielectric constant and a high Q value, as well as excellent temperature stability, and which is sinterable at a relatively low temperature. The dielectric ceramic composition of the present invention is formed of a mixture of a BaO--TiO.sub.2 --REO.sub.3/2 --BiO.sub.3 ceramic composition wherein RE represents a rare earth element, and a glass composition. The glass composition contains about 13-50 wt. % SiO.sub.2, about 3-30 wt. % B.sub.2 O.sub.3, about 40-80 wt. % alkaline earth metal oxide and about 0.1-10 wt. % Li.sub.2 O.
摘要:
A high purity dielectric ceramic composition is disclosed. This composition provides improved electrical properties in the form of ultra-high electrical Q, a low (T.sub.f) property and a high dielectric constant (K). This composition is also amenable to large scale manufacturing processes and operations. The composition provides a multi-oxide dielectric with BaO--Nd.sub.2 O--Sm.sub.2 O.sub.3 --TiO.sub.2 --La.sub.2 O.sub.3 Bi.sub.2 O.sub.3 and ZnO as constituents. The composition materials effectively provide these desirable properties in a custom composition of various oxide materials advantageously including samarium oxide (Sm.sub.2 O.sub.3).
摘要:
A dielectric ceramic composition used for a ceramic capacitor for temperature compensation, a resonator and the like. The dielectric ceramic composition comprises a composite oxide containing, as metal elements, main components of (i) barium, (ii) rare earth elements such as neodymium (Nd) or Nd and Sm in combination, and (iii) elements of the Group IV of periodic table such as titanium (Ti) or Ti and Zr or Sn in combination, and an assistant component of manganese, wherein the main components comprise from 7.5 to 16.25 mol % of a barium oxide, from 16.75 to 23.75 mol % of an oxide of rare earth element, and from 67 to 71.66 mol % of an oxide of element of the Group IV reckoned as a molar composition of the ternary-component-based oxide, the manganese component is contained in an amount of from 0.01 to 0.5% by weight reckoned as MnCO.sub.3 with respect to the main components, and sodium component which is an impurity is contained in an amount of not larger than 0.10% by weight with respect to the whole amount.
摘要:
In a dielectric ceramic composed of a La.sub.2 O.sub.3 -CaO-TiO.sub.2 -MgO type or a BaO-Nd.sub.2 O.sub.3 -TiO.sub.2 type, the oxygen vacancy concentration of the ceramic is controlled below 7.times.10.sup.18 /cm.sup.3 by, for example, annealing the mixture after firing, or heat-treating the mixture after firing. The Q value of the dielectric ceramic can be markedly increased. In addition, ceramics having stable properties can be produced. Thus, the dielectric ceramics can fully cope with high frequencies and large electrification.
摘要翻译:在由La2O3-CaO-TiO2-MgO型或BaO-Nd2O3-TiO2型构成的介电陶瓷中,陶瓷的氧空位浓度通过例如烧制后的混合物退火或加热而控制在7×10 18 / cm 3以下 在烧制后加入混合物。 电介质陶瓷的Q值可以显着增加。 此外,可以制造具有稳定性能的陶瓷。 因此,电介质陶瓷可以充分应对高频和大电气化。