摘要:
Provided is a lead-free piezoelectric ceramics having enhanced mechanical quality factor (Qm) and mechanical strength. The piezoelectric ceramics, includes at least a first crystal grain and a second crystal grain. The first crystal grain has an average equivalent circle diameter of 2 μm or more and 30 μm or less. The first crystal grain includes a perovskite-type metal oxide represented by the following general formula (1) as a main component, and the second crystal grain includes a perovskite-type metal oxide represented by the following general formula (2) as a main component: (1) xBaTiO3-yCaTiO3-zCaZrO3; and (2) x'BaTiO3-y'CaTiO3-z'CaZrO3, provided that x, y, z, x', y', and z' satisfy x+y+z=1, x'+y'+z'=1, 0≤x'≤0.15, 0.85≤y'≤1, 0≤z'≤0.05, x>x', 0 0.
摘要翻译:提供了具有增强的机械品质因数(Qm)和机械强度的无铅压电陶瓷。 压电陶瓷至少包括第一晶粒和第二晶粒。 第一晶粒的平均当量圆直径为2μm以上且30μm以下。 第一晶粒含有下述通式(1)所示的钙钛矿型金属氧化物作为主成分,第二晶粒含有下述通式(2)所示的钙钛矿型金属氧化物作为主成分 :(1)xBaTiO3-yCaTiO3-zCaZrO3; 和(2)x'BaTiO3-y'CaTiO3-z'CaZrO3,条件是x,y,z,x',y'和z'满足x + y + z = 1,x'+ y'+ z' =1,0≤x'≤0.15,0.85≤y'≤1,0≤z'≤0.05,x> x',0 0。
摘要:
A varistor may include a varistor ceramic that includes zinc oxide having a molar percent greater than 90 percent and a set of metal oxides, where the set of metal oxides includes Bi 2 O 3 having a molar fraction between 0.2 and 2.5 percent; Co 3 O 4 having a molar fraction between 0.2 and 1.2 percent; Mn304 having a molar fraction between 0.05 and 0.5 percent; Cr 2 0 3 having a molar fraction between 0.05 and 0.5 percent; NiO having a molar fraction between 0.5 and 1.5 percent; Sb203 oxide having a molar fraction between 0.05 and 1.5 percent; B 2 O 3 having a molar fraction between O.OO1 to 0.03 percent; and aluminum in the form of an oxide having a molar fraction between 0.001 and 0.05 percent.
摘要翻译:变阻器可以包括包含摩尔百分比大于90%的氧化锌和一组金属氧化物的变阻器陶瓷,其中该组金属氧化物包括摩尔分数在0.2和2.5%之间的Bi 2 O 3; Co 3 O 4的摩尔分数为0.2〜1.2% Mn304的摩尔分数为0.05〜0.5% 摩尔分数为0.05〜0.5%的Cr 2 O 3; 摩尔分数为0.5〜1.5%的NiO; 摩尔分数为0.05〜1.5%的Sb 2 O 3氧化物; 摩尔分数为0.001-1.0%的B2O3; 铝和氧化物形式的铝,其摩尔分数为0.001至0.05%。
摘要:
본 발명은 금속 산화물을 포함하는 활성물질활성물질활성물질 및 마그네시아를 포함하는 지지체를 가지는 산소공여입자에 관한 것이다. 본 발명에 따른 산소공여입자를 사용함으로써, 낮은 소성온도에서도 강도 등의 물리적 특성이 우수하며, 유동층 공정에 바람직하게 사용할 수 있다.
摘要:
The invention relates to a granulated powder intended, in particular, for the production of ceramic sintered parts, said powder having the following chemical weight composition, based on dry matter, namely: a zirconia stabiliser selected from the group containing Y2O3, Sc2O3, MgO, CaO, CeO2, and mixtures thereof, the weight content of stabiliser, based on the total zirconia and stabiliser content, being between 2 % and 20 % and the MgO + CaO content being less than 5 % based on the total zirconia and stabiliser content; at least 1 % of a first binder having a glass transition temperature less than or equal to 25°C; 0 - 4 % of an additional binder having a glass transition temperature greater than 25°C; 5 - 50 % alumina; 0 - 2 % of an alumina sintering additive; 0 - 4 % of a temporary additive different from the first binder and the additional binder, the total content of the first binder, the additional binder and the temporary additive being less than 9 %; 0 - 6 % of an additional oxide selected from a manganese oxide, ZnO, La2O3, SrO, BaO and mixtures thereof; less than 2 % impurities; and ZrO2 to make up 100%. According to the invention, the total lanthanum oxide content is less than 6 %, the median diameter D50 of the powder is between 80 and 130 µm, the percentile D99.5 is less than 500 µm and the relative density of the granules is between 30% and 60%.
摘要:
Particule frittée présentant une analyse chimique telle que, en pourcentages en masse, ZrO 2 partiellement stabilisée avec CeO 2 et Y 2 O 3 : complément à 100%, AI 2 O 3 : 10 - 60% additif sélectionné parmi CaO, un oxyde de manganèse, La 2 O 3 , SrO, BaO, et leurs mélanges : 0,2 - 6%, la teneur en CaO étant inférieure à 2%, impuretés : 2 et Y 2 O 3 , présents en des teneurs molaires, en pourcentages molaires sur la base de la somme de ZrO 2 , CeO 2 et Y 2 O 3 , telles que CeO 2 : 6 - 11 mol% et Y 2 O 3 : 0,5 - 2 mol%, la particule étant obtenue par frittage à une température de frittage supérieure à 13000C, la température de frittage étant supérieure à 1400°C si l'additif est CaO ou si la teneur molaire en CeO 2 est comprise entre 10% et 1 1 %.
摘要翻译:本发明涉及一种具有以CeO 2和Y 2 O 3部分稳定的ZrO 2的化学分析(重量百分比)的烧结颗粒:余量高达100% Al2O3:10-60%; 选自CaO,氧化锰,La2O3,SrO,BaO及其混合物的添加剂的添加量:0.2-6%,CaO含量低于2%; 杂质:2和Y 2 O 3,其摩尔含量以ZrO 2,CeO 2和Y 2 O 3的总和为基准计算,CeO 2:6〜11摩尔%。 和Y 2 O 3:0.5-2mol%,所述颗粒通过在高于1300℃的烧结温度下烧结而制备,如果添加剂为CaO,则烧结温度低于1400℃,或者如果CeO 2摩尔含量为10-11 %。
摘要:
主組成が63~80モル%のFe 2 O 3 、3~15モル%のZnO、及び残部酸化マンガンからなり、Fe 2 O 3 の含有量X(モル%)から式(1):R cal = [200(X-50)]/(3X)により決まるR cal に対して、焼結体中の全Fe量中のFe 2+ の割合R(%)がR cal - 2.0≦R≦R cal + 0.3の条件を満たすとともに、焼結体密度が4.9 g/cm 3 以上であるフェライト焼結体。
摘要翻译:一种铁氧体烧结体,其主要组成为Fe 2 O 3为63〜80摩尔%,ZnO为3〜15摩尔%,锰氧化物的平衡量为Rcal-2.0≤R≤ 其中Rcal由式(1)确定:Rcal = [200(X-50)] /(3X),其中X是Fe 2 O 3的含量(摩尔%),R(%)为 烧结体中的Fe的总量中的Fe 2+的比例,其中,烧结体的密度为4.9g / cm 3以上。
摘要:
A ceramic mixture composition having negative temperature coefficient of resistance (NTC), the said composition comprising about 95.0 wt. % of tetragonal form of Mn 3 O 4 and about 5.0 wt. % of La 2 O 3 , the said ceramic mixture is mixed with steric acid and wax, compacted and provided with two electrodes disposed from each other to form a thermistor having resistance of the order of mega ohm at a temperature of 25°C and the resistance of the thermistor drops by almost 40% with every 20°C rise in temperature and stabilizes to 250 ± 50 ohms at a temperature range of 330°C ± 6%.
摘要翻译:一种具有负温度系数(NTC)的陶瓷混合物组合物,所述组合物包含约95.0wt。 %的四方晶形Mn 3 O 4和约5.0wt。 %的La 2 O 3,将所述陶瓷混合物与空间酸和蜡混合,压实并设置有彼此设置的两个电极,以在25℃的温度下形成具有大欧姆值的电阻的热敏电阻, 热敏电阻每升高20°C会下降近40%,在330°C±6%的温度范围内稳定在250±50欧姆。
摘要:
Es wird ein Material für ein thermoelektrisches Element angegeben, das Kalzium-Mangan-Oxid umfasst, wobei eine teilweise Dotierung mit Fe-Atomen an Plätzen von Mn-Atomen vorliegt. Weiterhin wird ein Verfahren zur Herstellung eines Materials für ein thermoelektrisches Element (1) angegeben, wobei das Verfahren einen Brennvorgang umfasst und wobei die maximale Temperatur während des Brennvorgangs knapp unter dem Schmelzpunkt des Materials liegt.
摘要:
The present invention provides for a structure for use in a thermo chemical fuel production process, said structure having a void phase and a solid phase, wherein the structure has an effective total optical thickness for solar radiation or effective total optical thickness for infrared radiation of from 0.1 to 10, wherein the solid phase has a geometrical specific surface area of more than 2*103 m-1 and wherein the solid phase comprises and preferably consists of a reactive material.
摘要翻译:本发明提供了一种用于热化学燃料生产过程的结构,所述结构具有空隙相和固相,其中该结构具有用于太阳辐射的有效总光学厚度或用于红外辐射的有效总光学厚度 0.1至10,其中固相具有大于2×10 3 m -1的几何比表面积,并且其中固相包含并优选由反应性材料组成。