How to calculate the carrier concentration for semiconductor (bulk, powder) if the resistance is very high like Mega ohm?

how to calculate the carrier concentration for semiconductor (bulk, powder) if the resistance is very high like Mega ohm? I think Hall measurement and seaback coefficient measurement wont work in...

03 April 2019 1,748 4 View

What is the reason of La2O3 being a p-type matarial?

it has been reported in several literature. however I couldn't find the real reason behind it.

09 October 2018 6,045 3 View

Under which conditions poling depletes the performance of Piezoelectric material?

i have poled the ZnO sample ranging from 1kV to 10 kV. however, my piezoelectric performance decreased in all the cases. any reference where poling have reduced the performance are highly anticipated

04 May 2018 6,895 3 View

Can somebody thorow some light on this configuration of PE loop??

Graph (a) is intrinsic ZnO. Graph (b) is Doped ZnO in 1% graph (c) is doped ZnO 2.5% graph (d) is doped ZNO 5%. intrinsic shows pure resistive behavior however after doping Resistive changes to...

10 November 2017 9,681 13 View

The mixture was precipitated in methanol to get powder? what does it mean

I am not from chemistry background. Does it mean it was filtered by Methanol using a simple filter paper and pouring down methanol and then collecting the filterate!!! please give your suggestions

05 June 2017 773 5 View

Dear all, I am trying to find the generation of stresses when a curled like an Arched shaped thin sheet is subjected to a pressure vertically downward

Flettening of pre strained film using COMSOL the image is attached for reference which shows the deformed state of the film. The geometry was imported from CAD file. I am using boundary load, and...

03 April 2016 1,333 1 View

If I add a built-in material to COMSOL, it asks me to input the elasticity matrix, coupling matrix and relative permittivity? Where can I get it?

Simple materials like Aluminium, steel, air etc. the software asks me to input the above details? What could be the problem as some videos show that for built in materials you need not enter any data?

01 February 2015 1,706 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View