Формирование октакальцийфосфата при взаимодействии карбоната кальция и монокальцийфосфата моногидрата в гальваностатических условиях

Кальцийфосфатный композит октакальцийфосфат/кальцит получали в водной среде при pH 5–7 из суспензии CaCO₃/Ca(H₂PO₄)₂ в гальваностатическом режиме при плотности тока 20 мА/см² в течение 20 мин. Высушивание при 80 °C без стадии созревания осадка приводило к получению порошка, состоящего из брушита, кальцита и малого количества октакальцийфосфата. Длительное созревание на воздухе (2 мес.) приводило к гидролитической трансформации брушита в октакальцийфосфат, стабилизированный кальцитом. Использование электрического тока позволило увеличить количество октакальцийфосфата в составе композитного порошка с морфологией пластинчатых розеток. Термообработка при 800 °C композитных порошков приводила к формированию α/β-трикальцийфосфата, β-пирофосфата кальция, гидроксиапатита и оксида кальция.

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