Choi hj

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Questions related from Choi hj

How to etching sol-gel metal-oxide selectively?

I want to etching or patterning for bilayer channel layer of transistor consist of SnO2/ZnO on ZrO2 dielectric layer Generally, I thought that above process would proceed by HCl etchant But I...

19 May 2017 5,160 3 View

How can I get a sol-gel derived pzt film which has good quality?

Please see attached SEM image Left image is my PZT film and right image film is PZT film that I want to make 1. Some voids(black circled) is formed in my film. But there are no voids in right...

07 November 2015 257 2 View

Does anyone know about relationship between polarization and piezoelectric constant (d33)?

In many letters about piezoelectric materials like PZT, PLZT, author shows P-E curve which is illustrated by hysteresis loop shape or dielectric constant Does anyone know about relationship...

15 August 2015 6,524 3 View

What is the temperature for condition of constant current joule heating for metal alloys?

Is there anyone who know temperature in constant current joule heating?If current is maintained constantly in alloy joule(ohmic) heating, the temperature of metal alloy is maintained constantly?If...

29 July 2015 9,873 3 View

How can I use R-phase of NiTi?

In two-way shape memory alloy, it can memorize not only shape of Austenite phase, but also shape of Martensite phase.Then, if NiTi has R-phase, can it memorize shape of R-phase likes triple-shape...

26 July 2015 4,387 4 View