JP6746117B2 - アパタイト結晶の製造方法 - Google Patents
アパタイト結晶の製造方法 Download PDFInfo
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Description
(実施例1:フラックス法)
はじめに、CaHPO4、CaCO3、CaCl2を、Ca:P:Clのモル比が5:3:1となるように計量し、均一混合する。その後、塩素アパタイト濃度が0.15mol%となるようにNaClを追加し、混合物を白金るつぼ中で800〜1100℃まで昇温速度100〜500℃/hで昇温させ、合成温度800〜1100℃で48時間合成した後、降温速度5〜300℃/hで800〜1100℃から500℃まで降温させ、その後は自然冷却で常温まで冷却する。焼成後、温純水(約80℃)で丹念に洗浄し、塩素アパタイト単結晶を取り出す。
はじめに、CaHPO4、CaCO3、CaCl2を、Ca:P:Clのモル比が5:3:1となるように計量し、均一混合する。その後、多量のCaCl2を追加し、混合物を白金るつぼ中で800〜1100℃まで昇温速度100〜500℃/hで昇温させ、合成温度800〜1100℃で48時間合成した後、降温速度5〜300℃/hで800〜1100℃から500℃まで降温させ、その後は自然冷却で常温まで冷却する。焼成後、温純水(約80℃)で丹念に洗浄し、塩素アパタイト単結晶を取り出す。
はじめに、CaHPO4、CaCO3、SrCO3,CaCl2,SrCl2を、Ca+Sr:P:Clのモル比が5:3:1となるように計量し、均一混合する。その後、塩素アパタイト濃度が0.15mol%となるようにSrCl2を追加し、混合物を白金るつぼ中で800〜1100℃まで昇温速度100〜500℃/hで昇温させ、合成温度800〜1100℃で48時間合成した後、降温速度5〜300℃/hで800〜1100℃から500℃まで降温させ、その後は自然冷却で常温まで冷却する。焼成後、温純水(約80℃)で丹念に洗浄し、塩素アパタイト単結晶を取り出す。
はじめに、CaHPO4、CaCO3、MgCO3、CaCl2、MgCl2を、Ca+Mg:P:Clのモル比が5:3:1となるように計量し、均一混合する。その後、塩素アパタイト濃度が0.15mol%となるようMgCl2を追加し、混合物を白金るつぼ中で800〜1100℃まで昇温速度100〜500℃/hで昇温させ、合成温度800〜1100℃で48時間合成した後、降温速度5〜300℃/hで800〜1100℃から500℃まで降温させ、その後は自然冷却で常温まで冷却する。焼成後、温純水(約80℃)で丹念に洗浄し、塩素アパタイト単結晶を取り出す。
はじめに、純水に硝酸カルシウム、塩化カルシウムを溶解させ、その溶液中にリン酸を滴下し、pHを5〜9に調整することにより沈殿(種結晶)を生じさせる。この共沈法により調整した種結晶を、チョクラルスキー法により種結晶成長させる。CaCl2−Ca2ClPO4系相図において、Ca2ClPO4濃度が15mol%のものを1200℃まで加熱し、高温溶液となった中に種結晶を浸し、1200℃から1050℃まで徐冷しながら結晶を引き上げることにより、塩素アパタイト単結晶を得た。
はじめに、蒸留水に硝酸カルシウムを溶解させ、更にリン酸エトキシドを添加して(カルシウムとリンの合計モル濃度;0.05モル/リットル)撹拌した後、濃塩酸(カルシウム1モルに対して塩素は1モル)を加えた。この溶液を60℃で2時間乾燥して蒸留水を除去し、種結晶を得た。このゾル−ゲル法により調整した種結晶を、チョクラルスキー法により種結晶成長させる。CaCl2−Ca2ClPO4系相図において、Ca2ClPO4濃度が15mol%のものを1200℃まで加熱し、高温溶液となった中に種結晶を浸し、1200℃から1050℃まで徐冷しながら結晶を引き上げることにより、塩素アパタイト単結晶を得た。
はじめに、蒸留水にカルシウムエトキシドを溶解させ、更にリン酸を添加して(カルシウムとリンの合計モル濃度;0.05モル/リットル)撹拌した後、濃塩酸を加えた。この溶液を60℃で2時間乾燥して蒸留水を除去し、種結晶を得た。このゾル−ゲル法により調整した種結晶を、チョクラルスキー法により種結晶成長させる。CaCl2−Ca2ClPO4系相図において、Ca2ClPO4濃度が15mol%のものを1200℃まで加熱し、高温溶液となった中に種結晶を浸し、1200℃から1050℃まで徐冷しながら結晶を引き上げることにより、塩素アパタイト単結晶を得た。
次に、実施例の方法で作成した塩素アパタイト結晶の組成について検討した。図2は、実施例の方法で作成された結晶のX線回折パターンの一例である。図2に示すように、結晶は、塩素アパタイト結晶Ca5(PO4)3Clの単一層であった。
次に、塩素アパタイトチューブ単結晶の元素分析を行った。その結果、この結晶は、Ca=39.10mass%、P=18.00mass%、Cl=5.30mass%であった。
次に、塩素アパタイトチューブ単結晶の形状を走査型電子顕微鏡(SEM)にて観察した。図3は、SEMで観察した塩素アパタイトチューブ単結晶の一例を示す写真である。図3に示すように、本実施の形態に係るアパタイト単結晶は、チューブ状であり、外形が六角柱である。また、六角柱の上面または下面に形成されている穴の開口部の形状が六角形である。そのため、チューブの外壁の厚みがほぼ一様になっている。
Claims (2)
- 一般式がM2 5(PO4)3X(M2は2価のアルカリ土類金属及びEuからなる群より選ばれる少なくとも1種の元素、Xはハロゲン元素からなる群より選ばれる少なくとも一種の元素を示す。)で表されるアパタイト単結晶を準備する工程と、
所定の雰囲気に制御可能な空間に前記アパタイト単結晶を入れる工程と、
前記空間に水蒸気を供給する工程と、
前記空間の雰囲気が1100〜1200℃の範囲となるように加熱する工程と、
を備え、
前記加熱する工程は、6〜24時間の範囲で行われることを特徴とするアパタイト結晶の製造方法。 - 前記加熱する工程は、常圧下で行われることを特徴とする請求項1に記載のアパタイト結晶の製造方法。
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Application Number | Priority Date | Filing Date | Title |
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JP2016119079A JP6746117B2 (ja) | 2016-06-15 | 2016-06-15 | アパタイト結晶の製造方法 |
DE102017112937.5A DE102017112937B4 (de) | 2016-06-15 | 2017-06-13 | Verfahren zum Herstellen von Apatitkristallen |
US15/622,106 US10851472B2 (en) | 2016-06-15 | 2017-06-14 | Method of producing apatite crystal, and apatite crystal |
FR1755327A FR3052767B1 (fr) | 2016-06-15 | 2017-06-14 | Procede de production de cristal d'apatite et cristal d'apatite |
CN201710451939.3A CN107522185B (zh) | 2016-06-15 | 2017-06-15 | 磷灰石晶体的制造方法以及磷灰石晶体 |
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