Tag Archives: alumina ceramic

Molybdenum bolts for high temperature furnace

Posted on February 7, 2018 by dean

Q: I’m hoping you can help me with a high temperature issue. I’m running an ammonia plant where gases, along with hot air are heated to temps of 1800-2000F. The secondary reformer unit is made of carbon steel with refractory lining. I need bolting that can survive these temps so … Continue reading →

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Cost comparison of Zirconia vs Alumina screws

Posted on February 8, 2017 by dean

Q: Why does Zirconia cost more than Alumina? A:  1) Raw material cost: Aluminia is far more abundant, whereas Yttrium oxide which is a stabilizer for Zirconia ceramic, is a rare earth element. 2) Shaping costs: Due to its higher density it takes approximately 10x longer to grind down and shape … Continue reading →

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Bolts for high temperature vacuum furnace: Metal vs. Ceramic

Posted on February 8, 2017 by dean

Q: I’m using a high temperature vacuum furnace at 2500F. What type of material do you suggest using and is there any advantage of using a metal over a ceramic? A:   Under vacuum conditions with little to no oxygen present, there are some metallic options for fasteners which include … Continue reading →

Posted in Advanced Ceramic Fasteners, FAQs, High Temperature Resistance, Specialty Metal Fasteners, Technical Questions | Tagged , , , , , , , , , , , , , , , , , , | Leave a comment