Qun Ye

6 Questions 1 Answers 0 Followers

Questions related from Qun Ye

Why is sintering paste for die attach process always based on silver?

May I know why commercial sintering die attach paste is always based on silver? Why not other metals, such as copper and aluminum? Thanks.

19 March 2022 7,434 4 View

How to coat copper wire with palladium in the production of PdCu wire?

Hi, May I know what is the industrial process to coat copper wire with palladium in the production of PdCu wire? What is the process and what instruments are used? Please kindly advise. Thanks.

19 February 2022 781 5 View

How to measure moisture diffusion coefficient for plastic materials?

20 December 2021 5,870 3 View

What are the shortest possible wavelength for light and longest possible wavelength?

Does light have a possible shortest limit of wavelength and a possible longest limit of wavelength? When the wavelength of light becomes very very short, i.e., infinitely short, or infinitely...

29 June 2021 9,301 5 View

What are the general points to consider when one is to optimize a catalyst?

Dear expert, I have a technical question in mind: how to optimize a certain catalyst for a certain reaction? What are the general points to consider when one is to optimize a catalyst? Is there...

25 March 2021 8,134 4 View

Why does sodium metabisulfite generate turbidity when mixing with sodium hydroxide?

When I tried to mix a sodium metabisulfite solution with sodium hydroxide solution, the mixture solution quickly became turbid. Before mixing both were clear solutions. Please help explain the...

04 February 2021 8,243 2 View