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Best Ceramic Sheets

Macor, MAC2-061212, Machinable Ceramic Sheet, 3/8" Thick X 12" X 12"
Easily machined ceramic using standard cutters and practices-used as a prototyping to production material wherever ceramic may be needed-can hold and be machined to very accurate tolerances i.e. +/-.0001" and surface finishes down to 1-2 ra-it remains continuously stable at 800°C with a maximum peak at 1000°C-as an electrical insulator, particularly at high temperatures, it is excellent at high voltages and a broad spectrum of frequencies-coefficient of thermal expansion readily matches most metals and sealing glass.
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Macor, MAC2-040404, Machinable Ceramic Sheet, 1/4" Thick X 4" X 4"
Easily machined ceramic using standard cutters and practices-used as a prototyping to production material wherever ceramic may be needed-can hold and be machined to very accurate tolerances i.e. +/-.0001" and surface finishes down to 1-2 ra-it remains continuously stable at 800°C with a maximum peak at 1000°C-as an electrical insulator, particularly at high temperatures, it is excellent at high voltages and a broad spectrum of frequencies-coefficient of thermal expansion readily matches most metals and sealing glass.
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Alumina 96%, AS1-85, Fully Fired Ceramic Substrate Sheet, .060" Thick X 4 1/2" X 4 1/2"
Fully fired , thin, off the shelf, ready for laser cutting or metalizing.
Reviews
"Excellent for sharpening small tools."
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Best Ceramics Raw Materials

Glass-Mica Ceramic Round Rod, Opaque White, 3/4" Diameter, 6" Length (Pack of 1)
Applications include ultra-high vacuum environments, constant vacuum applications, nuclear-related experiments, welding nozzles, and medical equipment.
Reviews
"I accidentally snapped the rod twice while I was trying to wind it with resistance wire."
"Arrived quickly, price is very fair for the quality of the ceramic."
"I am using these in my rda in 3/8" sections on a quad coil series parallel circuit."
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Best Ceramic Rods

Glass-Mica Ceramic Round Rod, Opaque White, 3/4" Diameter, 6" Length (Pack of 1)
Applications include ultra-high vacuum environments, constant vacuum applications, nuclear-related experiments, welding nozzles, and medical equipment.
Reviews
"I accidentally snapped the rod twice while I was trying to wind it with resistance wire."
"Arrived quickly, price is very fair for the quality of the ceramic."
"I am using these in my rda in 3/8" sections on a quad coil series parallel circuit."
Find Best Price at Amazon