Abhinay Sreeram

12 Questions 17 Answers 0 Followers

Questions related from Abhinay Sreeram

Cracks arising due to co-firing of metal and ceramic?

what are the ways by which we can prevent crack generation due to CTE mismatch at high temperature sintering. I'm cofiring silver and PZT... #Silver #PZT #Ceramic #CTE mismatch

31 March 2023 6,159 4 View

What are the correlations between electrical conductivity and bandgap of materials w.r.t to ferroelectrics?

Doping is one of the way to reduce the bandgap of ferroelectrics/any materials. By doing so we create many defects in the system. these defects have a role on electrical conductivity (AC/DC). Is...

01 February 2022 5,994 3 View

What is the best method to find decrease in concentration of chlorpyrifos degradation under visible irradiation?

I'm doing the photocatalytic activity of chlorpyrifos (Pesticide) under visible irradiation with time...By using UV-visible spectrometer can we determine the change in concentration or is there...

20 December 2019 8,750 2 View

How to reduce dielectric loss of a material?

I'm working KNbO3 based materials..I have prepared my powder by solid state method and after calciantion at 850oC I'm pot milling my powder for 6h. I'm sintering my pellet at 1050oC/4h. If I...

20 December 2019 1,095 4 View

How to find conduction and valence band potentials?

I'm working on Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics..and I want to know the conduction and valence band potentials of my material for photodegradation purpose..can anyone help me ?

17 December 2018 5,151 3 View

Why dielectric constant is increasing at higher frequencies?

In general dielectric constant decreases with increase in frequency but in some cases at higher frequencies (above 10^5 Hz) we can observe there is a marginal increment in dielectric constant at...

13 August 2018 7,479 4 View

What are the factors that affects photocatalysis?

If a material has three absorption peaks like two in visible region (600-800 nm and 450-500 nm broad absorption peaks due to dopants) and the other in UV region (350 nm absorption edge of parent...

18 July 2017 304 7 View

Efefct of particle size on band gap of a material?

I have 2 powder samples of same material (BiFeO3 based) with different particle size, first is around 50 n.m and second is around 200 n.m. My question is does particle size has a role on band gap...

14 December 2016 4,442 5 View

How to know exact absorption edge from UV data ?

In the below attached image, absorption of a sample is increasing from 850 nm and it is continuously increasing upto 200 nm. But my doubt is that where the exact absorption edge is? i need to...

21 August 2016 2,445 6 View

What is the effect of oxygen vacancies on the band gap of a material?

Does oxygen vacancies has any role role to play on decreasing the band gap of a material..and how to find out whether oxygen vacancy is created is created with in the structure..?

05 August 2016 5,623 2 View

What is the accepted procedure for measuring UV Vis spec for a ceramic sample ?

I have BaTiO3 sample which is calcined at 1200oC, I want to know whether the powder directly can be used for measuring UV Vis spec or it has to be dispersed in some solvent or the powder has to...

13 June 2016 9,121 3 View

What is the best method for measuring UV-visible spectroscopy for a ceramic sample?

My sample is barium titanate based and I want to measure UV Visible spectroscopy. I want to know which method is correct 1.0 Dispersing the powder in some solvent or 2.0 Directly the powder itself

10 June 2016 5,403 7 View