Pyroelectricity GLY 4200 – Lecture 4 –Fall, 2012.

Slides:

Advertisements

Similar presentations

Various Polarization Processes

Advertisements

Molecular Polarity Notes

MOLECULAR SHAPE HOW DOES SHAPE AND POLARITY DETERMINE FUNCTION AND PROPERTIES OF MOLECULES?

16.6 Solving Problems Involving Coulomb’s Law and Vectors Vector addition review:

When a charged particle moves through a magnetic field, the direction of the magnetic force on the particle at a certain point is Q in the direction.

Chapter 4 Electrostatic Fields in Matter

Chapter 6 Dielectrics: I Electric Polarization P Bound Charges Gauss ’ Law, Electric Displacemant D.

 Lecture 3 .  Dielectric Materials  Dielectric materials are also called as insulators.  In dielectric materials, all the electrons are tightly bound.

Dielectrics Physics 101F. Introduction and Molecular Theory Dielectric are the insulators which are highly resistant to the flow of an electric current.

Physics for Scientists and Engineers II, Summer Semester Lecture 7: June 3 rd 2009 Physics for Scientists and Engineers II.

Copyright © 2007, Pearson Education, Inc., Publishing as Pearson Addison-Wesley. Magnets and the magnetic field Electric currents create magnetic fields.

3-6. Conductors in Static Electric Field

What is Temperature? Temperature may be defined as the condition of a body which determines the transfer of heat to or from other bodies. Use thermometers.

Copyright © 2007, Pearson Education, Inc., Publishing as Pearson Addison-Wesley. Magnets and the magnetic field Electric currents create magnetic fields.

Phy 213: General Physics III

Q23.1 When a positive charge moves in the direction of the electric field, 1. the field does positive work on it and the potential energy increases 2.

Polarity of Bonds Molecular Polarity. Equal Pull on Electrons If there is no difference in the electronegativity of the atoms forming a covalent bond,

Ohmic Heating Principle of ohmic heating electric current is passed through foods heating occurs in the form of internal.

AP Chemistry Chapters 9. Vocab (Ch 9) VSEPR- Valence Shell e- Pair Repulsion bonding pair non bonding pair – lone pair of electrons electron domain –

Magnetic Fields and Forces

Tipler: 21-7 Electromagnetism I Electric Dipoles and their Interactions in Electric Fields.

Ch ; Lecture 26 – Quantum description of absorption.

SCH 3U- Particle Theory and Kinetic Molecular Theory.

Copyright © 2009 Pearson Education, Inc. Molecular Description of Dielectrics.

Electric Field q1 q2 r 1,2 1,2 1,2 Question: Why q1 can feel q2 without direct contact? just as air around us, there’re something around a charge, i.e.

Magnets and the magnetic field Electric currents create magnetic fields Magnetic fields of wires, loops, and solenoids Magnetic forces on charges and currents.

Unit 4 Day 10 – Magnetic Materials & Electromagnets Ferromagnetic Materials Ferromagnetism at the Atomic Level Electromagnets & Their Applications.

COULOMB FORCE Charge q1 “Test Charge” q2 r 1,2 1,2 1,2

Bond Polarity & Molecular Polarity.  Occur when there is equal sharing of electrons between two atoms.  Form between:  Two identical nonmetal atoms.

Magnetization Some magnetically neutral objects can be influenced by magnetic fields Examples: carbon, copper, nickel Such objects are magnetized by an.

The diagram shows a flexible loop of wire between the poles of an electromagnet which provides a uniform field B in the region of the loop. At time.

What you’ve learned so far…..  Atoms form bonds in more than one way  In IONIC bonding, atoms give up or gain electrons  In COVALENT bonding, atoms.

Electrostatic field in dielectric media When a material has no free charge carriers or very few charge carriers, it is known as dielectric. For example.

The Electromagnetic Spectrum

Molecular Description of Dielectrics

-Atomic View of Dielectrics -Electric Dipole in an Electric Field -Partially Filled Capacitors AP Physics C Mrs. Coyle.

System of charges in an external field

Chapter 6 Dielectrics: I

Magnets and Electromagnetic Induction

3.3 Polar Bonds, and Polar Molecules

Polar Bonds and Molecules

Particle Theory and the Kinetic Molecular Theory

Electric Fields and Potential

Slide Presentations for ECE 329, Introduction to Electromagnetic Fields, to supplement “Elements of Engineering Electromagnetics, Sixth Edition” by Nannapaneni.

Vector Calculus (Chapter 13)

Rules for Predicting Molecular Geometry 1. Sketch the Lewis structure of the molecule or ion 2. Count the electron pairs and arrange them in.

W3 Preliminary Polarimetry Data

Electric Fields and Potential

Energy diagrams and orientation distributions of the NO molecule.

Lecture 20 Today Conductors Resistance Dielectrics

Dipole Moment Section 40.

ECE699 – 004 Sensor Device Technology

Pyroelectricity GLY 4200 – Lecture 4 –Fall, 2016.

Pyroelectricity GLY 4200 – Lecture 4 –Fall, 2018.

PHY 712 Electrodynamics 9-9:50 AM MWF Olin 103 Plan for Lecture 9:

Intermolecular Forces

Chapter 8 Covalent Bonding 8.4 Polar Bonds and Molecules

Trends in Electronegativity

Packet #5 Quiz.

Polar Bonds and Molecules

Bonding: General Concepts.

Phys102 Lecture 2 The Electric Field

...molecule is said to be a “polar”

More Electric Fields Physics 1220 Lecture 3.

Molecular Polarity Just like bonds, molecules can be:

Covalent Bonding & Intermolecular Forces

Molecular Shapes In order to predict molecular shape, we assume the valence electrons repel each other. Therefore, the molecule adopts whichever 3D geometry.

Bonding: General Concepts

Presentation transcript:

Pyroelectricity GLY 4200 – Lecture 4 –Fall, 2012

Pyroelectricity Effect Diagram Image: pyro.jpg

Polarization Pi = pi ΔT where Pi is the polarization vector, pi are the pyroelectric coefficients, and ΔT is the temperature change

PVDF Polymers - such as Polyvinylidenefluoride (PVDF) - consist of long chains of molecules, as is shown in the image above

Pyroelectricity in Polymers Certain molecular groups act as dipoles and can be oriented in an electric field When the poled polymer is exposed to heat, the sample expands, causing the dipole spacing to change, and generating a charge