摘要:
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof having a number-average molecular weight of at least about 250 g/mole by a polycondensation reaction using at least one acid catalyst.
摘要:
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof having a number-average molecular weight of at least about 250 g/mole by a polycondensation reaction using at least one acid catalyst.
摘要:
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.
摘要:
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.
摘要:
Processes for producing polytrimethylene ether glycol and copolymers thereof are provided wherein, by condensing and recycling at least a portion of the vapor phase produced as the reaction progresses, the yield loss and polymer color are reduced.
摘要:
Processes for producing polytrimethylene ether glycol and copolymers thereof are provided wherein, by condensing and recycling at least a portion of the vapor phase produced as the reaction progresses, the yield loss and polymer color are reduced.
摘要:
An electrical device having at least one functional element that includes a ceramic body, on which a first electrical contact layer and a second electrical contact layer are applied to two opposite-lying side faces, respectively, and the functional element is arranged between a first contact strip and a second contact strip, wherein the first contact strip and the second contact strip comprise several contact pins, respectively, and wherein the first contact layer electrically contacts at least one contact pin of the first contact strip and the second contact layer electrically contacts at least one contact pin of the second contact strip.
摘要:
A film stack made from compacted green films and capable of being sintered to form a ceramic component with monolithic multi-layer structure is disclosed. The film stack includes a functional layer comprising a green film comprising a functional ceramic and a tension layer comprising a green film comprising a dielectric material. The tension layer is directly adjacent to the functional layer in the multi-layer structure. The multilayer structure also includes a first metallization plane and a second metallization plane. The functional layer is between the first metallization plane and the second metallization plane.
摘要:
A ceramic multilayer capacitor includes a first capacitor unit, which comprises a first material, and a second capacitor units, which comprises a second material. The first and the second capacitor unit are electrically connected in parallel. At low applied voltages, the first material has a high dielectric value and, at high applied voltages the second material has a high dielectric value.
摘要:
A ceramic material having the general formula (BiXNayM zLuM V w) (Ti1-sZs)03, where: M comprises at least one element of main group 1, M comprises at least one element of main group 2, L comprises at least one element of the lanthanides, V is a vacancy and Z is selected from among Zr, Hf and combinations thereof, is provided. Furthermore, a piezoelectric actuator comprising the ceramic material and a process for producing the ceramic material are provided.
摘要翻译:具有通式(BiXNayM 1 zLuM 2 V V w)(Ti 1-s Z s)O 3)的陶瓷材料,其中:M 1包含主族1的至少一个元素,M 2包括 主要组2的至少一个元素,L包含至少一种镧系元素,V是空位,Z选自Zr,Hf及其组合。 此外,提供了包括陶瓷材料的压电致动器和用于制造陶瓷材料的方法。