Materials that bond with Calcium Fluoride?

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Discussion Overview

The discussion revolves around the bonding and adhesion properties of calcium fluoride (CaF2), particularly in the context of coating it with other materials. Participants explore the stability of CaF2 and the potential for coatings that adhere well under normal atmospheric conditions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions the meaning of "bond to," suggesting that CaF2 is a stable compound unlikely to form additional bonds.
  • Another participant clarifies their intent, asking about coatings that adhere well to CaF2 without peeling off.
  • A participant proposes magnesium fluoride (MgF2) as a potential coating material but expresses uncertainty about its suitability for practical applications.
  • Another participant discusses the concept of mechanical interlocking interfaces, mentioning literature on how surface features can enhance adhesion, though they are unsure how this applies to CaF2.

Areas of Agreement / Disagreement

Participants express differing views on the bonding capabilities of CaF2, with some suggesting it is stable and unlikely to bond further, while others explore the idea of adhesion and coatings. The discussion remains unresolved regarding the best materials or methods for achieving effective coatings.

Contextual Notes

There are limitations regarding the definitions of bonding and adhesion, as well as the specific conditions under which coatings might adhere to CaF2. The discussion does not clarify the methods for creating surface features that could enhance adhesion.

Who May Find This Useful

This discussion may be useful for materials scientists, chemists, and engineers interested in the properties of calcium fluoride and its interactions with other materials, particularly in optical applications.

lewdtenant
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Can anyone give me some insight into any materials/substances that might bond to calcium fluoride (CaF2)? Any help is appreciated, thanks.
 
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What do you mean, 'bond to'? CaF2 is a quite stable compound. It's not going to form any additional bonds.
 
sorry, that was probably a poor choice of words. I guess I mean, can CaF2 be coated with something that doesn't peel off under normal atmospheric conditions very easily?
 
lewdtenant said:
sorry, that was probably a poor choice of words. I guess I mean, can CaF2 be coated with something that doesn't peel off under normal atmospheric conditions very easily?
You want to protect an apochromatic objective?
 
lightarrow,

yes, I'm looking for the adhesive properties of CaF2.
 
Last edited:
lewdtenant said:
lightarrow,

yes, I'm looking for the adhesive properties of CaF2.
The best I can think of is magnesium fluoride MgF2, but I don't know if you were thinking of something easy to do for an astronomer fan, in which case I wouldn't know.
 
Thanks lightarrow,

I read somewhere about mag-fluoride as well. Also,

I guess I meant adhesion properties.. (is adhesive the same thing?). I've been reading up on the science of interfaces between materials and came across some literature on mechanical interlocking interfaces, where the substrate material has "digs" or "voids" that get filled in with the coating material, thereby giving better adhesion. Not sure how those digs are made, or if it's done with CaF2, but it sounds interesting.
 

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