About transparent ceramics?

thank you 1. Why uniformity of grains is important to have transparent ceramics?and How is effect uniformity of grains on increasing transparency of ceramics?then What can we do for have final...

01 February 2017 7,199 0 View

Why we need to cubic structure to produce transparent ceramic? and Is cubic structure concern to grain shape or unit cell?

if that is related to grain shape Why in some source implied "a lot of transparent have cubic structure but in some articles produce transparent ceramic with monoclinic or hexagonal structure is...

31 December 2016 9,062 3 View

Hi, How can we compeletely define synthesis ?

tnx

10 November 2016 6,791 0 View

Hello , How many roues are there for chemical synthesis ?

thank u

10 November 2016 5,403 0 View

I will used solid state reaction (SSR) for synthesis ZnWO4 , is it important the particles starting soluble in solvant?

09 October 2016 603 3 View

Is it any different between ceramic and polycrystal ?

tnx

09 October 2016 241 0 View

Is there valid sources for solubility material in solvants (especially water and ethanol) ?

09 October 2016 3,256 2 View

Who can introduce to me a software for calculate melting point a composition with some impurities ?

tank you

07 August 2016 9,495 1 View

Are there any different between soak time and dwell time in sintering processe ?

tnx

04 May 2016 6,365 0 View

Do we have any metallic scintillator ?

tnx

04 May 2016 5,252 0 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

How to resolve Gaussian error termination " Error termination via Lnk1e in F:\G16W\l103.exe" for TS(QST3)?

When I run the job for TS(QST3) in gaseous phase, it was completed without any error. But when I add water in CPCM model it terminated with an error: Inconsistency: ModMin= 2 Eigenvalue=...

21 February 2021 3,198 2 View

Using the Pfaffl method: Is it possible that the ratio of the calibrator does not equal 1?

Hi all, I have a question regarding calculations using the Pfaffl method. I have 3 groups per experiment: 1 control group (calibrator) and 2 treatment groups with 6 to 7 biological repeats per...

19 February 2021 8,351 2 View

How to calculate radial distribution function (RDF) of a complex from Ab initio MD simulation trajectory?

Hi all, Is there any software or webserver to read the molecular dynamics (MD) simulation trajectory which obtained from Ab initio MD simulation to calculate the atom-atom radial distribution...

25 January 2021 9,474 3 View

Solving diffusion- reversible chemical reaction equation: How to solve both terms numerically?

I am using finite difference method to discretize the parabolic equation (explicit method), but confused about the chemical reaction term. Solving the generic equation for i specie involves a...

24 January 2021 1,149 18 View

Doubt in DFT geometry preparation?

Hi all, I am trying to perform some ab inito DFT calculations using cp2k code. I have a unit cell of 120 atoms and would like to know how to refine or reduce the number of atoms in the unit cell...

20 January 2021 6,024 3 View

Why it is required to optimize a unit cell generated from cif lattice parameters and atomic coordinates during ab initio solid state calculations?

A cif file represents a unit cell with minimum energy. My question is, in the start of any ab initio calculation for unit cell generated from the cif file, why we are advised to optimize cell...

19 January 2021 9,883 3 View

Is it possible to calculate entalphy of LiBr/H2O or another solution if we know correlation of specific heat without using any software?

Is it possible to calculate entalphy of LiBr/H2O or another solution if we know correlation of specific heat without using any software?

17 January 2021 5,522 3 View

What is the best way to calculate electrical conductivity of semiconductors and the same system with a layer of oxide using Quantum Espresso?

I have tried BoltzTrap, and EPW but I'm not sure whether Boltzmann Transport Equation is a right approach for a complex system (semi cond. + an Oxide layer or even the semiconductor itself). Also...

11 January 2021 4,597 4 View

How to calculate IR and RAMAN spectra form Born charge ?

I am using crystal 17 for my solid state ab initio calculations. For some reason the program is not able to produce the Raman spectra but have generated born charges. Is there any way to produce...

11 January 2021 2,317 2 View