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Semi-hydrated-anhydrous calcium sulfate mixture with stable structure and preparation method thereof
The invention relates to a semi-hydrated-anhydrous calcium sulfate mixture with a stable structure and a preparation method thereof. When the semi-hydrated-anhydrous calcium sulfate mixture with the stable structure is naturally stored in an environment with a temperature of -40 to 40 DEG C and a relative humidity of less than 40%, the crystal morphology and the crystal form are kept stable within 180 days; when the mixture is naturally stored in an environment with a temperature of -40 to 40 DEG C and a relative humidity of 40%-60%, the morphology and the crystal form of the crystal are kept stable within 15-60 days; when the mixture is naturally stored in an environment with a temperature of -40 to 40 DEG C and a relative humidity of 60%-100%, the crystal morphology and the crystal form are kept stable within 5-32 days; and when the mixture is placed in water at the temperature of 0-40 DEG C, the hydration time is prolonged to 80 minutes. According to the invention, by finely controlling the heating temperature, the alpha-CaSO4. 5H2O can remove part of crystal water in the structure to obtain a soluble III type alpha-CaSO4 and alpha-CaSO4.0.5H2O mixture with controllable crystal form and structure, and the original crystal morphology is still maintained.
一种结构稳定的半水‑无水硫酸钙混合物及其制备方法，所述结构稳定的半水‑无水硫酸钙混合物，在温度‑40℃～40℃、相对湿度小于40%的环境中自然存放，在180天内晶体形貌和晶型均保持稳定；在温度‑40℃～40℃、相对湿度40%～60%的环境中自然存放，在15～60天内晶体形貌和晶型均保持稳定；在温度‑40℃～40℃、相对湿度60%～100%的环境中自然存放，在5～32天内晶体形貌和晶型均保持稳定；放置在0‑40℃的水中，水化时间延长到80min。本发明通过精细地控制加热温度，α‑CaSO4·0.5H2O可移除结构中的部分结晶水得到晶型和结构可控的可溶性III型α‑CaSO4与α‑CaSO4·0.5H2O的混合物，而且仍旧保持原有的晶体形貌。
Semi-hydrated-anhydrous calcium sulfate mixture with stable structure and preparation method thereof
The invention relates to a semi-hydrated-anhydrous calcium sulfate mixture with a stable structure and a preparation method thereof. When the semi-hydrated-anhydrous calcium sulfate mixture with the stable structure is naturally stored in an environment with a temperature of -40 to 40 DEG C and a relative humidity of less than 40%, the crystal morphology and the crystal form are kept stable within 180 days; when the mixture is naturally stored in an environment with a temperature of -40 to 40 DEG C and a relative humidity of 40%-60%, the morphology and the crystal form of the crystal are kept stable within 15-60 days; when the mixture is naturally stored in an environment with a temperature of -40 to 40 DEG C and a relative humidity of 60%-100%, the crystal morphology and the crystal form are kept stable within 5-32 days; and when the mixture is placed in water at the temperature of 0-40 DEG C, the hydration time is prolonged to 80 minutes. According to the invention, by finely controlling the heating temperature, the alpha-CaSO4. 5H2O can remove part of crystal water in the structure to obtain a soluble III type alpha-CaSO4 and alpha-CaSO4.0.5H2O mixture with controllable crystal form and structure, and the original crystal morphology is still maintained.
一种结构稳定的半水‑无水硫酸钙混合物及其制备方法，所述结构稳定的半水‑无水硫酸钙混合物，在温度‑40℃～40℃、相对湿度小于40%的环境中自然存放，在180天内晶体形貌和晶型均保持稳定；在温度‑40℃～40℃、相对湿度40%～60%的环境中自然存放，在15～60天内晶体形貌和晶型均保持稳定；在温度‑40℃～40℃、相对湿度60%～100%的环境中自然存放，在5～32天内晶体形貌和晶型均保持稳定；放置在0‑40℃的水中，水化时间延长到80min。本发明通过精细地控制加热温度，α‑CaSO4·0.5H2O可移除结构中的部分结晶水得到晶型和结构可控的可溶性III型α‑CaSO4与α‑CaSO4·0.5H2O的混合物，而且仍旧保持原有的晶体形貌。
Semi-hydrated-anhydrous calcium sulfate mixture with stable structure and preparation method thereof
一种结构稳定的半水-无水硫酸钙混合物及其制备方法
DOU YAN (author) / HU MENG (author) / CUI PENG (author) / LI ZHENG (author) / MA JIAN (author) / SHEN HAO (author) / ZHENG ZHIYIN (author) / LIU RONG (author) / PENG KERONG (author) / ZHU YINGJUN (author)
2021-12-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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