Electrophysical properties of microalloyed alumo-silicate ceramics as active dielectric

Pentacoordinate Silicon Complexes as Precursors to Silicate Glasses and Ceramics

The recent discovery that pentacoordinate alkali glycolato silicates such as monomeric MSi(OCH,CH,O),OCH,CH,OH or dimeric M,Si,(OCH,CH,O), (where M = Li, Na, K, or Cs) can be synthesized directly from SO,, ethylene glycol, and MOH suggests that these compounds may serve as useful, inexpensive precursors to alkali silicate glasses or ceramics, either by sol-gel processing or by simple pyrolysis....

Enhanced dielectric and piezoelectric properties of xBaZrO3-(12x)BaTiO3 ceramics

xBaZrO3-(1!x)BaTiO3 solid solutions (x 1⁄4 0, 0.04, 0.06, 0.08, 0.12, and 0.18) synthesized via conventional solid state reaction method exhibit piezoelectric coefficients comparable to those of “hard” PZT-8, PZT-4, and even “soft” PZT-5A. Doping also improves the poling efficiency of xBaZrO3-(1!x)BaTiO3 ceramics. Study of temperature dependence of the dielectric and piezoelectric properties re...

High frequency dielectric properties of A5B4O15 microwave ceramics

High-frequency dielectric properties of A5B4O15 ~A5Ba, Sr, Mg, Zn, Ca; B5Nb, Ta! dielectric ceramics are studied by means of the microwave cavity technique, a combination of far-infrared reflection and transmission spectroscopy and time-resolved terahertz transmission spectroscopy. Microwave permittivity e8 and Q3 f factor vary, depending on the chemical composition, between 11 and 51, and 2.4 ...

Dielectric properties of PbNb2O6 ferroelectric ceramics at cryogenic temperatures

investigation of gassing behavior, electric and dielectric properties of different insulating fluids.

ترانسفورماتورهای قدرت از اجزای اصلی شبکه تامین انرژی الکتریکی می باشند که عملکرد قابل اطمینان ترانسفورماتورها یکی از فاکتورهای مهم و تعیین کننده در تامین انرژی الکتریکی محسوب می شود. در نتیجه بررسی و مانیتور عملکرد ترانسفورماتورها در شبکه و همچنین عیب یابی این ترانسفورماتورها غیرقابل اجتناب و ضروری می باشد. به طور کلی عایق های مایع در صنعت فشار قوی کاربردهای متفاوتی دارند که مهمترین وظیفه آنها...