Abstract Single-phase metastable α ¯ -calcium pyrophosphate, stable β-calcium pyrophosphate and their mixtures were prepared as nanopowders via procedures of the fast nitrate synthesis, rinse, lyophilization and subsequent heat treatment of the precipitates with a set Ca/P ratio of 1:1. It was revealed that rinsing under certain conditions (a high water/slurry value, relatively prolonged treatment and a high pH) resulted in hydrolysis and increase in the Ca/P ratio up to 1.5 in the precipitates. Single-phase metastable α ¯ - and stable β-tricalcium phosphates, mixtures with each other and the calcium pyrophosphates in a desired composition were processed by heat treatment of the hydrolyzed precipitates for producing prospective biomaterials.

中文翻译：

---

通过漂洗沉淀的无定形磷酸钙，从水解中结晶亚稳态和稳定相，给定的 Ca/P 比为 1:1

摘要 通过硝酸盐的快速合成、漂洗、冻干和沉淀的后续热处理过程，将单相亚稳态α--焦磷酸钙、稳定的β-焦磷酸钙及其混合物制备为纳米粉体，Ca/P比为1。 :1。结果表明，在某些条件（高水/浆液值、相对延长的处理时间和高 pH 值）下冲洗会导致水解并使沉淀物中的 Ca/P 比增加至 1.5。单相亚稳态 α - 和稳定的 β-磷酸三钙、彼此的混合物和焦磷酸钙以所需的组成通过水解沉淀物的热处理进行加工，以生产预期的生物材料。