Calcium aluminate cement (CAC) is widely used as a binder for refractory materials, and thus the improvement in compressive strength is of vital importance for CAC applied at high temperature. For this purpose, nano-Ca₁₀(PO₄)₆(OH)₂ additive with a ratio of 0.5–1.5 mass% was added with the water-cement ratio to be 0.4. X-ray diffraction and isothermal calorimetry analysis demonstrate that nano-Ca₁₀(PO₄)₆(OH)₂ additive can shorten the hydration process and promote the formation of main hydrates of CaAl₂O₄·10H₂O (CAH₁₀) and Ca₂Al₂O₅·8H₂O (C₂AH₈). In addition, scanning electron microscopy results suggest that nano-Ca₁₀(PO₄)₆(OH)₂ can protect CAH₁₀ and C₂AH₈ from being destroyed during the calcination, guaranteeing that these thin lamellar crystals are intertwined to form the denser microstructure. Benefited from above effects, nano-Ca₁₀(PO₄)₆(OH)₂ can obviously improve the compressive strength of the CAC mortar samples cured for 7 d after calcination at 1100 °C, while the improving effect is dependent upon its contents. Especially, compared with the one without the additive, the compressive strength of the sample with 1.0% nano-Ca₁₀(PO₄)₆(OH)₂ is increased by 14%.

铝酸钙水泥（CAC）被广泛用作耐火材料的粘结剂，因此，抗压强度的提高对于高温下使用的CAC至关重要。为此目的，以0.5-1.5质量％的比例添加了纳米Ca ₁₀（PO ₄）₆（OH）₂添加剂，水灰比为0.4。X射线衍射和等温量热分析表明，纳米Ca ₁₀（PO ₄）₆（OH）₂添加剂可以缩短水合过程，并促进CaAl ₂ O ₄ ·10H ₂ O（CAH ₁₀）和主要水合物的形成。钙₂ Al ₂ O ₅ ·8H ₂ O（C ₂ AH ₈）。此外，扫描电子显微镜结果表明，纳米Ca ₁₀（PO ₄）₆（OH）₂可以保护CAH ₁₀和C ₂ AH ₈在煅烧过程中不被破坏，从而确保这些薄的层状晶体相互缠结形成致密的微观结构。受益于上述效应，纳米Ca ₁₀（PO ₄）₆（OH）₂可以显着提高在1100°C下煅烧7 d后固化的CAC砂浆样品的抗压强度，而改善效果取决于其含量。特别是，与不含添加剂的样品相比，具有1.0％纳米Ca ₁₀（PO ₄）₆（OH）₂的样品的抗压强度提高了14％。