Conventional acid-resistant ceramic may have excellent performance in many acids but significantly lower resistance to strong caustic solutions. For NaOH, KOH and other alkaline service, evaluate alkali resistance, concentration and temperature separately before selecting ceramic packing.

A 99%+ ceramic acid-resistance value indicates low material loss under specified test conditions. It does not prove compatibility with every acid or every operating temperature. Use it as one material-quality parameter, not as a complete process-compatibility guarantee.

Porosity influences ceramic packing strength because pores and defects concentrate stress and reduce the effective load-bearing structure. Water absorption, strength testing, geometry and firing quality should be evaluated together when assessing breakage risk.

Water absorption tells engineers about the accessible pore structure of ceramic packing. Lower values can indicate better vitrification, but “lower is always better” is an oversimplification. Evaluate the number against the ceramic grade, product geometry, test method and required service conditions.

Al₂O₃ and SiO₂ values help describe ceramic composition, but they do not by themselves define corrosion resistance, mechanical strength or service life. Compare finished-product properties and operating conditions rather than ranking ceramic packing solely by alumina percentage.