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Light-burned magnesia powder (also known as light-burned magnesia powder) is a product of magnesite calcined at 750-850°C. The complexity of magnesite ore determines the diverse composition of light-burned magnesia powder. Light-burned magnesia powder consists of active MgO, inactive MgO, and metal oxides such as CaO, Fe₂O₃, Al₂O₃, and SiO₂.

The relevant specifications for magnesium oxide products vary depending on the product being manufactured, and the applicable standards are not uniform. Generally speaking, light-burned magnesia used in the production of magnesium oxychloride and magnesium oxysulfide cement for building materials and insulation materials must meet the requirements of WB/T1019-2002, "Light-burned magnesia powder for magnesite products." Heavy-burned magnesia used in the production of magnesium phosphate and refractories must meet the requirements of HG/T2679-2006, "Industrial heavy magnesia." Furthermore, the production of refractory materials such as magnesia-carbon bricks requires reference to the relevant specifications of YB/T5266-2004, "Fused magnesia." The following are some excerpts of magnesium oxide specifications from national and industry standards.

1. Relevant standards for light-burned magnesium oxide are shown in Table 2.1.1 and Table 2.1.2

Table 2.1.1 Quantitative indicators of light-burned magnesium oxide powder for magnesia products

Table 2.1.2 Strength Requirements