CN1386700A - 自燃烧法合成羟基磷灰石微粉 - Google Patents

自燃烧法合成羟基磷灰石微粉 Download PDF

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CN1386700A
CN1386700A CN 02138721 CN02138721A CN1386700A CN 1386700 A CN1386700 A CN 1386700A CN 02138721 CN02138721 CN 02138721 CN 02138721 A CN02138721 A CN 02138721A CN 1386700 A CN1386700 A CN 1386700A
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hydroxyapatite
combustion method
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CN1173881C (zh
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王欣宇
韩颖超
李世普
戴红莲
阎玉华
陈晓明
曹献英
张胜民
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Wuhan University of Science and Engineering WUSE
Wuhan University of Technology WUT
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Abstract

本发明提供自燃烧法合成羟基磷灰石微粉。采用本发明合成方法时,首先按照Ca/P摩尔比为1.67称取计算量的Ca(NO3)2·4H2O、(NH4)2HPO4和与Ca离子等摩尔量的柠檬酸,然后溶解混合,调节其pH值在3左右,在80℃加热生成凝胶;将凝胶在200℃下加热、燃烧生成粉末前驱体;将前驱体在750℃煅烧保温制得微粉。所制得的羟基磷灰石微粉纯度高、平均粒径小。本方法具有精确控制Ca/P比以及较低温度下进行合成的优点。

Description

自燃烧法合成羟基磷灰石微粉
一.技术领域:
本发明是一种羟基磷灰石微粉的合成方法。
二.背景技术:
目前,制备羟基磷灰石微粉的方法主要有水热反应法、溶胶-凝胶法和沉淀法。水热反应法一般是在100~350℃温度下和高气压环境下使无机或有机化合物与水化合,通过对加速渗析反应和物理过程的控制,得到改进的无机物,再过滤、洗涤、干燥,从而得到高纯、超细的各类微颗粒;溶胶-凝胶法是以液体的化学试剂配制成金属无机盐或金属醇盐前驱体,前驱物溶于溶剂中形成均匀的溶液,溶质与溶剂产生水解或醇解反应,反应生成物经聚集后,一般生成1nm左右的粒子并形成溶胶。经过长时间放置或干燥处理溶胶会转化为凝胶;沉淀法通常是在溶液状态下将不同化学成分的物质混合,在混合溶液中加入适当的沉淀剂制备超微颗粒的前驱体沉淀物,再将此沉淀物进行干燥或煅烧,从而制得相应的超微颗粒。但是水热反应法和沉淀法不能精确控制Ca/P比,沉淀法和溶胶-凝胶法需经高温处理,粉体可能发生团聚。
[专利文献]
1.国别:中国分类号:C01B25/32申请日:2000.11.10公开日:2001.08.15申请号:00127421.X
2.国别:中国分类号:C22C27/02;C22C14/00申请日:1993.01.20公开日:1994.08.03申请号:93100234.6
三.发明内容:
本发明提供一种自燃烧法合成羟基磷灰石微粉。
本发明采取的技术方案:
首先,按照Ca/P摩尔比为1.67称取计算量的Ca(NO3)2·4H2O、(NH4)2HPO4和与Ca离子等摩尔量的柠檬酸,然后用蒸馏水溶解、混合,调节其pH值在3左右,80℃加热蒸发,6-8小时后生成凝胶;待凝胶中的水分基本蒸干后,将其移至200℃恒温的电炉中,燃烧生成羟基磷灰石粉末的前驱体;最后将前驱体经750℃煅烧保温得到羟基磷灰石微粉。
本发明的有益效果是,可以在精确控制Ca/P比及较低温度下合成羟基磷灰石微粉,并且合成的微粉纯度高、平均粒径小。
四.附图说明:
图1是本发明工艺流程图;
图2是750℃煅烧保温1小时后得到羟基磷灰石微粉的X射线衍射图谱;
图3是750℃煅烧保温1小时后得到羟基磷灰石微粉的透射电镜照片。
五.具体实施方式:
首先,分别称取Ca(NO3)2·4H2O19.706g(0.0835mol)、(NH4)2HPO46.603g(0.05mol)和柠檬酸17.547g(0.0835mol),分别用蒸馏水25ml、30ml和50ml溶解;将三种溶液混合,用硝酸调节其pH值在3左右,80℃边搅拌边加热,发生了如下化学反应:
;                         (1)
随着溶剂的蒸发,溶液粘度的增加,C6H6O7Ca通过氢键相连,形成凝胶。
待形成凝胶后,移至200℃恒温的电炉中,干凝胶立即燃烧,燃烧过程中伴有大量气体和热量放出,体积膨胀,得到前驱体粉末。发生了如下化学反应:
;                   (2)
前驱体粉末在750℃下煅烧保温1小时,发生了下列化学反应:
                                  (3)
                                            (4)
                                          (5)
     (6)
                                             (7)
                         (8)
最后得到羟基磷灰石微粉,由图2可知,其主晶相为羟基磷灰石;由图3统计,其一次平均粒径为85nm;经Brookhaven instruments Corp.粒度分析仪分析,微粉的二次平均粒径为494.6nm。

Claims (1)

1、自燃烧法合成羟基磷灰石微粉,其特征是:首先按照Ca/P摩尔比为1.67称取计算量的Ca(NO3)2·4H2O、(NH4)2HPO4和与Ca离子等摩尔量的柠檬酸,然后用蒸馏水溶解、混合,调节其pH值在3左右,80℃加热蒸发,6-8小时后生成凝胶;待凝胶中的水分基本蒸干后,将其移至200℃恒温的电炉中,燃烧生成羟基磷灰石粉末的前驱体;最后将前驱体经750℃煅烧保温得到羟基磷灰石微粉。
CNB021387214A 2002-06-28 2002-06-28 自燃烧法合成羟基磷灰石微粉 Expired - Fee Related CN1173881C (zh)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100336719C (zh) * 2006-03-28 2007-09-12 成都迪康中科生物医学材料有限公司 水热法制备纳米羟基磷灰石胶体的方法
CN100384720C (zh) * 2006-07-26 2008-04-30 中国科学院上海硅酸盐研究所 一种经改进的羟基磷灰石粉体的制备方法
CN100480177C (zh) * 2004-07-28 2009-04-22 同济大学 含碳酸根纳米羟基磷灰石微粉的合成方法
CN101205058B (zh) * 2006-12-22 2010-05-19 中国科学院过程工程研究所 一种微米级球形羟基磷灰石的制备方法
CN101376495B (zh) * 2008-10-13 2011-07-06 河南科技大学 溶胶-凝胶自蔓延燃烧法制备β-磷酸三钙微粉的工艺方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340310C (zh) * 2005-05-08 2007-10-03 天津大学 β-TCP/HA复合生物材料的制备方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100480177C (zh) * 2004-07-28 2009-04-22 同济大学 含碳酸根纳米羟基磷灰石微粉的合成方法
CN100336719C (zh) * 2006-03-28 2007-09-12 成都迪康中科生物医学材料有限公司 水热法制备纳米羟基磷灰石胶体的方法
CN100384720C (zh) * 2006-07-26 2008-04-30 中国科学院上海硅酸盐研究所 一种经改进的羟基磷灰石粉体的制备方法
CN101205058B (zh) * 2006-12-22 2010-05-19 中国科学院过程工程研究所 一种微米级球形羟基磷灰石的制备方法
CN101376495B (zh) * 2008-10-13 2011-07-06 河南科技大学 溶胶-凝胶自蔓延燃烧法制备β-磷酸三钙微粉的工艺方法

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