tailieunhanh - Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 11

Tham khảo tài liệu 'materials science and engineering - electronic and mechanical properties of materials part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Langasite fR T Temperature dependence of the resonance frequency fR of a resonator device with difference mass loads. ---------------------------------------------------------------------------------------------------- Wj-Sjgg- e . Tuller-2001 xgTHtjgy 27 Ongoing Activities Resonator Langasite -- H. Fritze - Defect chemistry - Oxygen diffusion exchange studies - Bulk conductivity dependence on T and PO2 Active Layer PCO -- T. Stefanik - Transport-Defect chemistry correlations Gas Sensor -- - Add active layer PCO using PLD nanocrystalline vs microcrystalline - Sensor testing e . Tuller-2001 28 xgTHtjgy 14 Magnetic Materials The inductor Vx E -- B CGS c dt iivx EdS - 1- ii BdS -1- c 5t J 7 c dt o B magnetic flux density IIVxEdS 1E dl Green s Theorem V IE dl -1 - explicit Faraday s Law J c dt SỆ ----------------------------------- Lfdpgdd oB LI Q CV ỔO dI L-d- dt dt V _ ÕN B _ L dl V - L d dI 0V V L -d- recall I C -d- for the capacitor _ _0I Power VI LI - dt Energy I Power dt I LIdI -LI2 -2- NoBI capacitor CV2 1 E. Fitzgerald-1999 1 The Inductor w D _ 4n 1 dE VxB J -- c c dt vx BdS 1B dl IIJ dS I 4n B - In c N n length nl L ẹ NBA 4n iflA I I c 2 E. Fitzgerald-1999 2 1 magnetic field B magnetic induction X magnetic susceptibility H magnetic field strength applied field M magnetization Magnetic Permeability and Susceptibility Insert magnetic material Magnetic dipoles in material can line-up in B H 4nxH H 4nM dM M XH TTT X g 1 4nx dH B 4nM 1 B ụH MKS B g0 H M g0nI g0M gr B goH 1 M H 1 Xm E. Fitzgerald-1999 3 Maxwell and Magnetic Materials Ampere s law j H dl I 0 For a permanent magnet there is no real current flow if we use B there is a need for a fictitious current magnetization current Magnetic material inserted inside inductor increases inductance OB BA 4nMA 4njHA 4nx 1 T NO 4n 2 2 L n lAx I c In 1A Material Type X c Paramagnetic 10-5-10-4 Diamagnetic -10 -10 Ferromagnetic 10 L increased by X due to magnetic