What is the optimal amount of flux ( H3BO3) that gives excellent optical propeties in Calcium Aluminate CaAl2O4:Eu2+ Phosphor?

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When using the Debye-Scherrer equation for calculating particle size (D=Kλ/(β cos θ) does one have to halve the FWHM(β)? Must all angles be in Radians?

The Debye-Scherrer method is used to obtain X-ray diffraction measurements in powders.This method is applicable to crystallites ranging from 1.0 to 0.01 μm in diameter, but the grains must have...

01 February 2013 6,780 40 View

How to define an anisotropic material with asymmetric elastic compliance/stiffness matrix in ANSYS APDL?

I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...

09 August 2024 5,048 2 View

Why does my protein refolded to beta sheet during thermal denaturation analysis?

Hi! So i attempted to understand a novel protein behavior towards heat application by analyzing its secondary structure change. I subjected the protein to a thermal denaturation analysis using...

06 August 2024 1,989 3 View

Please explain how the plastic input value should be considered from the true stress-strain curve for the bilinear elastoplastic material model ?

I am working on Abaqus/Explicit(Quasistatic ) for the deformation of the auxetic structure model. Please explain how the plastic input value should be considered from the true stress-strain curve...

05 August 2024 454 3 View

Is it possible to manufacture polypropylene sheets using a biaxial process?

I know that films and other low-thickness laminated products are produced using biaxial orientation, but is there something similar for sheets with a thickness of around 6 mm? Or are they...

21 July 2024 1,559 1 View

Why am I seeing only one initial maximum in torque-time curves for the fusion of PVC in a Brabender?

We're studying the stability and fusion behavior of multiple PVC compounds in a Brabender. After a few trials, we set the temperature at 195 °C and the rotor speed at 70 rpm. Samples differ in...

12 July 2024 2,768 1 View

What is the reason of appearance of 2 or 3 peaks in zeta potential analysis of sample?

Hello I have prepared metal nanoparticles and did zeta potential. Normally there is a single peak in sample but now there are 3 peaks. I prepared sample for analysis first I prepared 10 mg/mL...

30 June 2024 1,063 4 View

Can someone help me to model a core-shell nanostructure in GDIS and subsequently prepare the fdf file for using in SIESTA?

I am very new to the material modelling in GDIS. So, I want to learn how to model a nanostructure specifically core-shell in GDIS.

28 June 2024 5,224 0 View

What is the difference between creep deformation and stress relaxation ?

I understand the basic definition for both. I found a literature to describe both of them. In the paper, they states: If a stress is applied to a concrete body, the body experiences an elastic...

19 June 2024 525 3 View

Difference between creep deformation and stress relaxation deformation ?

I understand the basic definitions of creep and pressure relaxation. However, I am confused about the exact difference between them. See attached photo. Because a compression force is applied,...

17 June 2024 5,344 2 View

What is the relation between "Depth of Field" and "Resolution" in microscopy ?

Please explain with reference to the attached figure. Also, What does "infinite resolution" of a microscope (optical or electron) imply? Similarly what do we mean by "zero resolution"? Does having...

04 June 2024 711 4 View