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 Black silicon carbide (SiC), green silicon carbide (SiC), tungsten carbide (WC), titanium carbide (TiC) and boron carbide (B4C) 

Aluminum nitride (AlN), silicon nitride (Si3N4), boron nitride (BN), titanium nitride (TiN) and zirconium nitride (ZrN):

Introduction to dental yttrium-stabilized zirconia powder:
- Main ingredients: Based on zirconium oxide (ZrO₂), an appropriate amount of yttrium (Y) element is added as a stabilizer to form yttrium-stabilized zirconia (YSZ), common ones include 3Y-TZP (3mol% yttrium-stabilized tetragonal zirconia polycrystals), 5Y-PSZ (5mol% yttrium-stabilized partially stabilized zirconia), etc.
- Appearance: Usually white or off-white fine powder, with uniform particle size, spherical or nearly spherical.

The main differences between white corundum, brown corundum and black corundum are as follows:
Color
- White corundum: white and transparent.
- Brown corundum: brown-black, brown-red, crimson, etc.
- Black corundum: black with metallic color.
Alumina content
- White corundum: aluminum oxide content ≥99.2%, the highest among the three types of corundum.
- Brown corundum: 94%≤alumina content≤75%.
- Black corundum: 45%≤alumina content≤75%, relatively low aluminum oxide content.

Riding the wind and waves, bidding farewell to the old and welcoming the new. At this moment full of hope and joy, Hebei Suoyi New Materials Technology Co., Ltd. ushered in the highly anticipated annual event - the 2025 New Year's Party on January 6. This is not only a joyful gathering, but also a summary and recognition of the hard work of the past year, as well as a prospect and plan for future development.