| 羟基磷灰石合成及高温稳定性的研究 |
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| 引用本文： | 蔡舒,姚康德,李鸿祥. 羟基磷灰石合成及高温稳定性的研究[J]. 无机材料学报, 2003, 18(4): 807-812 |
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| 作者姓名： | 蔡舒 姚康德 李鸿祥 |
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| 作者单位： | 1. 天津大学材料学院高温陶瓷及机加工技术教育部重点实验室; 2. 天津大学高分子材料研究所, 天津 300072 |
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| 基金项目： | 天津市重大基金项目(003805011) |
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| 摘 要： | 以Ca(NO3)2·4H2O和(NH3)2HPO4为原料,用沉淀法合成羟基磷灰石(HA)。在合成过程中添加明胶,考察明胶对HA成核、生长、粉末形态及热稳定性的影响。研究表明:当明胶加入量超过4wt％时,将阻碍HA的成核和生长;加4wt％明胶合成的粉末,经900℃煅烧,其平均颗粒尺寸为40nm,明显小于未加明胶的HA粉末,但热稳定性较差;在1000℃煅烧便有部分羟基磷灰石分解,生成β-磷酸钙。此β-磷酸钙煅烧至1500℃呈熔融态,仍没有相变为α-磷酸钙,具有很好的热稳定性。
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| 关 键 词： | 羟基磷灰石 明胶 成核 热稳定性 |
| 文章编号： | 1000-324X(2003)04-0807-06 |
| 收稿时间： | 2002-06-07 |
| 修稿时间： | 2002-06-07 |
Synthesis of Hydroxyapatite Powder and Its Thermal Stability |
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| CAI Shu,YAO Kang-De,LI Hong-Xiang. Synthesis of Hydroxyapatite Powder and Its Thermal Stability[J]. Journal of Inorganic Materials, 2003, 18(4): 807-812 |
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| Authors: | CAI Shu YAO Kang-De LI Hong-Xiang |
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| Affiliation: | 1.Key Laboratory of State Education Ministry for High Temperature Structural Ceramics and Machining Technology of Engineering Ceramics; 2.Research Institute of Polymeric Materials; Tianjin University; Tianjin 300072; China |
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| Abstract: | The role of gelatin was examined with the main focus on its induction ability of hydroxyapatite (HA) nucleation in a modified aqueous solution with gelatin. The results show that when the addition of gelatin is in the range of 1wt%～3wt%, HA crystal is formed with a perfect crystalline. However, no HA nucleation occurrs when gelatin content reaches 4wt% because of the steric effect. When the dried powder with 4wt% gelatin addition calcined at 900℃, the average size of HA is about 40nm which is smaller than those of synthesized particles without gelatin addition. However, this powder is easier to decompose to β-TCP when sintered at 1000℃, and the resultant β-TCP possesses a significant thermal stability up to 1500℃. |
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| Keywords: | hydroxyapatite gelatin nucleation thermal stability |
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