JPS573719A - Preparation of gamma-type ferric oxide - Google Patents
Preparation of gamma-type ferric oxideInfo
- Publication number
- JPS573719A JPS573719A JP7861180A JP7861180A JPS573719A JP S573719 A JPS573719 A JP S573719A JP 7861180 A JP7861180 A JP 7861180A JP 7861180 A JP7861180 A JP 7861180A JP S573719 A JPS573719 A JP S573719A
- Authority
- JP
- Japan
- Prior art keywords
- gamma
- preparation
- ferric oxide
- type ferric
- 90w20mol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To prepare γ-Fe2O3 having wide service temperature range when used as an electronic material, etc., by pulverizing and oxidizing the mixed powder of Fe3O4 and γ-Al2O3.
CONSTITUTION: Mixed powder composed of 90W20mol% of Fe3O4 and 10W 80mol% of γ-Al2O3 is pulverized for ≥102 minutes, and oxidized in air. As an alternative method, a powdery mixture composed of 90W20mol% of γ-Fe2O3 and 10W80mol% of γ-Al2O3 is pulverized for ≥102 minutes. Transition temperature from γ-Fe2O3 to α-Fe2O3 can be increased by this process.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55078611A JPS6021924B2 (en) | 1980-06-10 | 1980-06-10 | Method for producing gamma type ferric oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55078611A JPS6021924B2 (en) | 1980-06-10 | 1980-06-10 | Method for producing gamma type ferric oxide |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS573719A true JPS573719A (en) | 1982-01-09 |
JPS6021924B2 JPS6021924B2 (en) | 1985-05-30 |
Family
ID=13666670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55078611A Expired JPS6021924B2 (en) | 1980-06-10 | 1980-06-10 | Method for producing gamma type ferric oxide |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6021924B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0234668A (en) * | 1988-06-16 | 1990-02-05 | Bayer Ag | Thermally stable iron oxide pigment of gamma-fe2o3 structure and its preparation and use |
JPH11240724A (en) * | 1997-11-19 | 1999-09-07 | Bayer Ag | Iron oxide yellow pigment stable to heat |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0336924U (en) * | 1989-08-21 | 1991-04-10 |
-
1980
- 1980-06-10 JP JP55078611A patent/JPS6021924B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0234668A (en) * | 1988-06-16 | 1990-02-05 | Bayer Ag | Thermally stable iron oxide pigment of gamma-fe2o3 structure and its preparation and use |
JPH0577614B2 (en) * | 1988-06-16 | 1993-10-27 | Bayer Ag | |
JPH11240724A (en) * | 1997-11-19 | 1999-09-07 | Bayer Ag | Iron oxide yellow pigment stable to heat |
JP4627817B2 (en) * | 1997-11-19 | 2011-02-09 | ランクセス・ドイチュランド・ゲーエムベーハー | Iron oxide yellow pigment stable to heat and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JPS6021924B2 (en) | 1985-05-30 |
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