Yes, but you need to be able to bond glass to the alloy (note the color shift in that housekeeper's seal), and nickel alloys like kovar tend to have a really hi

Yes, but you need to be able to bond glass to the alloy (note the color shift in that housekeeper's seal), and nickel alloys like kovar tend to have a really high magnetic permeability, limiting their application in experiments that need highly controlled magnetic fields.