In a ceramic body MgO is small in the recipe and large in the result. It controls sintering and grain growth, and in soft magnetic ferrite it sits at the grain boundary — which is where magnetic loss is decided.
Trace iron raises magnetic loss and there is no way to remove it downstream.
Calcium shifts the sintering curve and the firing window moves with it.
Insoluble residue shows up as inclusions in the fired body.
The trade-off you should plan for
Higher purity costs more per tonne. ZH-V2 at 99.7% is worth it when iron or calcium is the failure mode, and not worth it when the body tolerates them — ZH-V3H at 99.5% usually covers that case.
Our highest-assay magnesium oxide: 99.7% MgO minimum, with CaO, chloride and iron held low enough for electronic ceramics and soft magnetic ferrite. Choose it when trace impurities, not reactivity, are the risk.
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A 99.5% high purity magnesium oxide for applications that need purity and reactivity together — rubber vulcanisation, pharmaceutical and food formulations, fine-chemical synthesis. Move to ZH-V2 when iron and calcium become the constraint.
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Specified where trace calcium, chloride and iron would show up in the fired body or the final formulation. The carbonate route to MgO for electronic ceramics, and a controlled magnesium source for fine-chemical use.
View detailsSend the target grain size, magnetic loss or shrinkage and we will match a grade, or hold the impurity limits you specify on a custom lot.
Yes. Independent inspection before loading is supported on request; you nominate the inspection company and the scope. Every batch is released against its own certificate of analysis in any case, and the tested value — not a range — is reported for every parameter.
Lead, arsenic, cadmium and mercury, tested per batch on food and pharma lots, with the measured value on the COA.
We hold ISO 9001 for the design, development, manufacture and sales of magnesium compounds. No certificate number, issuing body or validity date is published until the client supplies them. Other certifications, including REACH registration, food-contact and pharmacopoeia documentation, halal and kosher, are confirmed per destination market before quotation — ask our team for the current document set.
Send your grade and volume — we reply with a quotation and the technical data within one working day.
