# Search results

1. ### How to program a Pulse generator

Actually i have a bimorph piezoelectric material (piezo-film deposited in Stainless steel substrate), and based on simulation the resonant frequency is around 20Hz.
2. ### How to program a Pulse generator

I'm sorry i didn't tell the whole story. So first i have experiment in piezoelectric material. I will apply AC voltage (using pulse generator) and then i will measure the output voltage using oscilloscope. From that i need to determine the resonant frequency, by sweeping the frequency. When i...
3. ### How to program a Pulse generator

So First, your saying using "External Width Mode" we can program the frequency, but we need an external sweep generator? (can you provide brand and model?). Second, if we set the frequency in 2Hz, based on my experiment the generated voltage is not stable (range from 20mV-10mV), but as your...
4. ### How to program a Pulse generator

May you suggest an external trigger (brand and model, the cheapest one) that works in my pulse generator?
5. ### How to program a Pulse generator

The parameter that i used are: Amplitude voltage = 5V, delay =0.0ns, Resistance = 50 ohms, cycle =50% and frequency = 1 to 100 with an 0.1 interval and have 2 seconds delay. Thank you very much for your help!
6. ### How to program a Pulse generator

My problem is, how to vary the frequency automatically.
7. ### How to program a Pulse generator

Hi there! is anyone here working with a pulse generator? I have Agilent 8114A Pulse generator i want to vary the frequency automatically like 1.1Hz to 10.1Hz with 1-2 secs delay. This pulse generator have a HP-IB bus at the back that can connect in a PC. Base on the Manual it can program using...
8. ### Resonant frequency of Piezoelectric material

This one sir?
9. ### Resonant frequency of Piezoelectric material

So this is the set-up your trying to say? if i set the resonant frequency i will detect higher amplitude voltage?
10. ### Resonant frequency of Piezoelectric material

Is CRO a special type of oscilloscope?
11. ### Resonant frequency of Piezoelectric material

No sir, i vary the frequency manually (from 1-100hz because the simulation results fall at 50hz). I will take note your suggestion but i need to plot voltage vs. frequency.

yes sir!
13. ### Resonant frequency of Piezoelectric material

Yes sir you're right! basically another way is to measure the current across the piezoelectric material as the frequency varies. But i need to plot the voltage vs. frequency. So using oscilloscope i can determine the voltage amplitude due to vibration, But then as i said no change in voltage...
14. ### Resonant frequency of Piezoelectric material

So i have a piezoelectric film deposited in the metal substrate and i want to determine the resonant frequency. Basically i can determine the resonant frequency base on the dimensions. But i need to proved it using experimental set-up. So i applied AC Voltage to the material then the material...
15. ### Vibrational frequency of Piezoelectric effect

when a piezoelectric material experience a stress it generates voltage, and also when you applied voltage the piezo-material experience a vibrational frequency. Using oscilloscope we can determine the induced frequency of the piezo-material with respect to the applied voltage. Now given the...
16. ### Determine the shear strain

I don't know how to solve this kind of problem: Given a crystal and its volume V. This Crystal is subjected to a shear stress making a slip plane (h k l ) in a slip direction [h k l]. Given also the lattice parameter a and slip plane spacing L, and the edge dislocation a/2 that passed halfway...
17. ### What is the stress of the rotated axis

Given only the triaxial stresses: ax = 10 MPa (along [100]), ay = 10 MPa (along [010]), and ax = -30 MPa (along [001]), what is now the components of stresses in rotated axis? so based on the equation aT = [L][a][LT] let aT the components of stress of rotated axis, L the direction cosine, LT...
18. ### Effective annealing parameters in N-doped Zinc oxide

Good day every one! Based on my research as you increased the temperature, the grain size become bigger and the thickness decreased, but in some paper, thickness increased. The effects of annealing temperature is almost the same to the temperature. But if you will considering doping for...
19. ### What is the best for piezoelectric material?

Based on my research the effects of the holes, electrons, acceptor and donor concentration is telling you the direction of the polarization and the conventional sign of the electric potential generated. But up until now, i don't know what is the best material to used for piezoelectric material...
20. ### Relationship of bulk modulus and fractional volume change

So my question is, if the bulk modulus change by 5%, what is the fractional volume change value? is it times 0.05 or divided by 0.05? or the fractional volume change still the same?
21. ### Work done up to fracture

Good day everyone! i have a problem dealing with the fracture analysis. We all know that the work done per unit volume is equal to the area under the curve of stress-strain curve or we can express it in terms of integral form, and if we're looking at necking point stress can be express in this...
22. ### Difference between ohmic contact and schottky contact

Hi guys!, i want to know the advantages/disadvantages of using ohmic contact and schottky contact, because i will fabricate a photodiode (p-n junction) and lot of the articles say that ohmic contact is the best for this kind of device. But schottky contact rectify the signal which is more...
23. ### How dopant enhances the superconductivity of BSCCO

Good day! i really need your help, I want to know the effect of Dopant (for Example Manganese) in BSCCO (for example Bi-2212) on it's Resistivity? i read some articles saying it increases the critical temperature of the superconductor, But it didn't explain why, and how is that related to the...
24. ### Role of Mn in Magnetoresistance of Perovskite

Good Day everyone! right now i'm searching for possible research in magnetoresistance properties of perovskite. So far, i already know the effect of Mn in Perovskite, it enhance the ferromagnetic properties of the material. And Manganites in Ferromagnetic State possessed magnetoresistance in...
25. ### Heating a Lanthanum Hydroxide

Hey guys!, I just want to know what will happen when you heat up lanthanum hydroxide La(OH)3 from 20 degree Celsius to 900 degree Celsius in a furnace with O2 gas. Is the mas of La(OH)3 increases? and why? thanks in advance!
26. ### Factors affecting the size of ZnO thin films (by spray pyrolysis)

Good day guys, aside solution concentration and depositing time, what are the factors affecting the size of the ZnO thin films deposited by spray pyrolysis. Also please include the articles or links for citation thanks!
27. ### Role of Bias Voltage in Semiconductor Light detector

Good day!, today, i visited an Institute about Semiconductor devices, One characterization device (Reflectance Spectrometer) which used to determine the reflectance of the semiconductor materials. This device used Semiconductor detector to detect the reflected light from the sample, but i'm...
28. ### Criteria for choosing a substrate for thin films

I want to deposit ZnO (n-type) thin films in Silicon (p-type) substrate using spray pyrolysis, but i don't know the reasons why many articles choose silicon over other substrates
29. ### Criteria for choosing a substrate for thin films

Hi guys!, i want to know what are the criteria in choosing a substrate to deposit thin films, like what are the physical and chemical properties of the substrate to be compatible in depositing thin films?
30. ### Silicon wafer as substrate in Zinc oxide thin films

But what is the difference of using glass substrate over silicon substrate? i think the mismatch of crystal parameters would help not to diffuse zinc oxide on Si under a fabrication method but remain on the surface of the silicon.