JPS5918955A - Electrophotographic ferrite carrier - Google Patents

Electrophotographic ferrite carrier

Info

Publication number
JPS5918955A
JPS5918955A JP57128643A JP12864382A JPS5918955A JP S5918955 A JPS5918955 A JP S5918955A JP 57128643 A JP57128643 A JP 57128643A JP 12864382 A JP12864382 A JP 12864382A JP S5918955 A JPS5918955 A JP S5918955A
Authority
JP
Japan
Prior art keywords
ferrite
electrophotography
monovalent
formula
type
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.)
Pending
Application number
JP57128643A
Other languages
Japanese (ja)
Inventor
Tsutomu Iimura
飯村 勉
Minoru Chinju
鎮守 稔
Yojiro Kamiyama
神山 洋二郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP57128643A priority Critical patent/JPS5918955A/en
Publication of JPS5918955A publication Critical patent/JPS5918955A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00Developers
    • G03G9/08Developers with toner particles
    • G03G9/10Developers with toner particles characterised by carrier particles
    • G03G9/107Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/108Ferrite carrier, e.g. magnetite

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Compounds Of Iron (AREA)

Abstract

PURPOSE:To obtain a toner enhanced in image characteristics and life, by using a ferrite having Ba and/or Sr partially substd. by another mono- or di-valent metal, and a specified value or more in each of electric resistance and saturation magnetization. CONSTITUTION:The ferrite has a composition of a magnetoplumbite structure of a hexagonal system ferrite represented by formula I in which Me is Ba or Sr, having its metal being substd. by at least one kind of monovalent or 3 or more valent metal, or a compsn. of a Z type of formula II belonging to the hexagonal system ferrite of MeFe12O19 represented by formula II, or Y type of formula III(Me being same), its Ba and/or Sr being substd. by at least one of mono-valent or 2 or more valent metal. A carrier among these ferrites having >=10OMEGAcm resistivity, and >=10emu/g saturation magnetization value, and 10-1,000mum average particle diameter is used. As a result, a carrier superior in image characteristics and long in life is obtained.

Description

【発明の詳細な説明】 本発明は、電子写真用トナーキャリA7−に関するもの
である。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic toner carrier A7-.

電子写真の現像法どしては、カスケード現像法、磁気ブ
ラシ現像法、イの仙の方法が知られているが、これら現
象法に使用される1〜ナーキ【・リアーどして要求され
る特性は、適当な摩擦帯電性を持ち1ヘナ一粒子を吸引
すること、緻密であり粒子の強度が十分て破壊を生じな
いこと、粒子が流動性に富むこと、粒子が均一であるこ
と、表面の状態が湿度等によって変らず種々の特性が安
定していること、引張り・圧縮強度等を有すること、ま
た適切な飽和磁イし、’>M磁率あるいは保磁力を有す
ること等である。
The cascade development method, magnetic brush development method, and Inosen's method are known as developing methods for electrophotography. The characteristics are that it has appropriate triboelectricity and can attract one particle of henna, that it is dense and strong enough to prevent breakage, that the particles are highly fluid, that the particles are uniform, and that the surface It must have various properties that do not change due to humidity, etc., it must have tensile and compressive strength, it must have an appropriate saturation magnetization, it must have a '>M magnetic coefficient, or it must have a coercive force.

従来よりトナーキャリアー粒子として種々の4A料が使
用されてきているが、最も多く用いられているものどじ
て鉄粉がある。これは鉄粉の表面を適当な処理をして使
用しているものであるが、長時間使用すると粒子の表面
が物理的あるいは化学的に変化し、[・ナーが付着して
しまったり、あるいは使用環境の湿度に敏感になって画
像の鮮明度がうすれたりするため寿命が短いという欠点
がある。また、L・ナーキIlリアーどして酸化物磁性
材料であるフェライ1−を用いることも知られているが
(例えば、特開昭52−56536号公報等)従来の電
子写真用フエライ1−キトリアーは画像特性あるいは寿
命の点で必ずしも満足しうるちのではない。
Various 4A materials have been used as toner carrier particles, but the most commonly used is iron powder. This is made by appropriately treating the surface of iron powder, but when used for a long period of time, the surface of the particles changes physically or chemically, resulting in the adhesion of [・ner] or It has the disadvantage of a short lifespan because it becomes sensitive to the humidity of the environment in which it is used, and the sharpness of the image may fade. It is also known to use ferrite 1-, which is an oxide magnetic material, as L. are not necessarily satisfactory in terms of image characteristics or lifespan.

本発明はこれら従来の電子写真用トナーキt・リアーの
欠点をな(し、画像特性の優れた、また寿命の長い新規
な構成の電子写真用フエライ1−キ1シリア−を提供す
ることを目的どするものである。
It is an object of the present invention to overcome the drawbacks of the conventional electrophotographic toner kits and to provide an electrophotographic toner kit with a novel structure that has excellent image characteristics and has a long life. What to do.

上記目的を達成するために本発明は、MeFe120+
l(MeはBaまたはSrを示す)のマグネ1−プラン
バイ1〜構造を示ずフエライ1−のM eを1価または
2価の金属のうちの1種または2種以上で置換した組成
、またはMe FCl2019の六方晶フエライ[・に
属するZタイプB a2M c2F O24042。
In order to achieve the above object, the present invention provides MeFe120+
1 (Me represents Ba or Sr), a composition in which Me of Magne 1-Pranby 1 to Ferrai 1-, which does not show a structure, is replaced with one or more monovalent or divalent metals, or Z type B a2M c2F O24042 belonging to the hexagonal ferrite of Me FCl2019.

YタイプB a2M O2に82”1104gの)]−
]ロックスーブレーのBaおよびM cのいずれか一部
を、または両方を1価または2価の金属のうち一種ある
いは二種以上で置換した組成からなり、電気抵抗率10
 Ωam以上で飽和磁化値が1Q emlJ/’F以上
の特性を有し、平均粒径が10・〜1000μmである
ことを特徴とするものである。
Y type B a2M O2 of 82”1104g)]-
] It consists of a composition in which a part or both of Ba and Mc of Rock Souvre is replaced with one or more types of monovalent or divalent metals, and has an electrical resistivity of 10.
It is characterized by having a saturation magnetization value of 1Q emlJ/'F or more at Ωam or more, and an average grain size of 10.about.1000 μm.

本発明において、上記フエライ1−キャリアーの電気抵
抗率は特に103ΩCm以上が良く、本範囲内と覆るこ
とにより摩擦帯電量を適当な値に制御し易くなり、また
湿度等の影響は受けにくくなるため、目的どづる鮮明な
画像を得ることが容易である。また、飽和磁化の値は1
0 emu/’g以上が適切でこの値より小さい場合に
は磁気ロールとの吸着力は落ち、目標とする鮮明な画像
を得ることが難かしくなる。また、上記フエライ1〜の
保磁力1−ICが1000e以上では、粒子イのものが
磁石の性質をもち種々の部品に(t Wし易くなるため
良い画像は得られない。また、透磁率μが10未満では
磁気ロールへの反応が悪くなり画質に影響を与える。
In the present invention, it is particularly preferable that the electric resistivity of the Feray 1-carrier is 103 ΩCm or more, and by keeping it within this range, it becomes easier to control the amount of triboelectric charge to an appropriate value, and it is less susceptible to the effects of humidity, etc. , it is easy to obtain the desired clear image. Also, the value of saturation magnetization is 1
A value of 0 emu/'g or more is appropriate; if it is smaller than this value, the adhesion force with the magnetic roll decreases, making it difficult to obtain the desired clear image. In addition, if the coercive force 1-IC of the above-mentioned ferrites 1 to 1 is more than 1000e, good images cannot be obtained because particles 1 have magnetic properties and are easily attached to various parts. If it is less than 10, the response to the magnetic roll will be poor and the image quality will be affected.

以下、本発明を実施例によって詳細に説明づる。Hereinafter, the present invention will be explained in detail by way of examples.

実施例1 モル比で、Ba017%、pbQ3%、 7n020%
、FezOa60%となるように秤位し混合した。混合
機どしてはボールミル、振動ミル、ミキサー等を用いた
。混合粉は800・〜1200°Cで仮焼した。仮焼し
た試料はボールミル、振動ミル、アt・ライター等の粉
砕機を用い粉砕した。粉砕後の粒径は、空気透過法を用
い測定した結果、平均粒径て0.3・〜2.0μmであ
った。次いで、粉砕した試料を、バインダーとしてp、
v、△(ポリビニルアルコール)の水溶液(P、V、へ
のElとしては、0.05−s、o  wt%)を使用
し、スプレードライヤー、ニーダ−、ミキサー等の造粒
器を用い造粒した。
Example 1 In molar ratio, Ba017%, pbQ3%, 7n020%
, and mixed so that the FezOa was 60%. A ball mill, a vibration mill, a mixer, etc. were used as the mixer. The mixed powder was calcined at 800-1200°C. The calcined sample was pulverized using a pulverizer such as a ball mill, a vibration mill, or an at-lighter. The particle size after pulverization was measured using an air permeation method, and the average particle size was 0.3 to 2.0 μm. Then, the crushed sample was mixed with p as a binder,
Using an aqueous solution of v, △ (polyvinyl alcohol) (El for P, V, 0.05-s, o wt%), granulate using a granulator such as a spray dryer, kneader, mixer, etc. did.

次に造粒粉を1100〜1400℃で焼成した。焼成方
法どしてはアルミナ等の容器に造粒わ)を入れて焼成し
ても良いが、多量に容器に入れて焼成する場合には焼成
の際に粒成長し、粒同士が接合する場合があるため、本
実施例ではa−タリーキルン等で試料を回転しながら焼
成した。得られたV)末を組成分析した結果、組成はほ
ぼ目標どするものであることかわかった。
Next, the granulated powder was fired at 1100 to 1400°C. As for the firing method, it is possible to put the granulated material in a container such as alumina and fire it, but if a large amount is put in a container and fired, the grains may grow during firing and the grains may join together. Therefore, in this example, the sample was fired while rotating in an a-tary kiln or the like. As a result of compositional analysis of the obtained V) powder, it was found that the composition was almost as expected.

このようにして得られたフェライトの品持性を第1表(
こ示り。
The quality of the ferrite thus obtained is shown in Table 1 (
This shows.

この球状フエライ[・をI・ナーキトリアーとしC使用
し電子複写した結果、従来の鉄粉キt・リアーでは約1
0,000枚、通常の電子写真用)1ライトキIlリア
ーでは約50,000枚であったのに対し、本発明電子
写真用ノエライ[・キャリアーを用いることににす70
.000−100,000枚の鮮明なコピーが「■能で
あ−〕だ。
As a result of electronic copying using C as this spherical powder [.
0,000 sheets, compared to about 50,000 sheets for ordinary electrophotographic carriers, it was decided to use the electrophotographic carrier of the present invention.
.. 000-100,000 clear copies are ``■Noh''.

実施例2 モル比r、SrO?5%、1i2Q4%、 V2O3−
1%、Zn020%、「e20360%となるように秤
量し、実施例1と同様な処理により、はぼ同特性をもつ
球状のフェライトを作成した。この球状フェライトをフ
エライ1−キトリアーどしてコピー試験した結果実施例
1と同様のコピー性能を得た。
Example 2 Molar ratio r, SrO? 5%, 1i2Q4%, V2O3-
1%, Zn020%, and e20360%, and processed in the same manner as in Example 1 to create a spherical ferrite having almost the same characteristics.This spherical ferrite was copied using Ferrite 1-Kitoria. As a result of the test, the same copying performance as in Example 1 was obtained.

本発明にJ′3いて、フ1ライ1〜キA・リアとしての
良質な画像特性を得る組成範囲は次のように1−ること
が望ましい。すなわち、モル比で、+3aOあるいはS
rOは3〜30%、FC!203は50−90%、1価
または2価の金属酸化物、あるいは1価と2価、1価と
2価以上の金属酸化物はいずれも40%以下が望ましい
。上記で示した母組成に対し、1価または2価の金属が
40%を越えると、鮮明な画像は得られなくなる。
In the present invention, it is preferable that the composition range for obtaining good image characteristics for fly 1, fly 1, and rear A and rear is as follows. That is, in molar ratio, +3aO or S
rO is 3-30%, FC! 203 is preferably 50-90%, and monovalent or divalent metal oxides, monovalent and divalent metal oxides, monovalent and divalent or higher valent metal oxides are all preferably 40% or less. If the monovalent or divalent metal exceeds 40% of the base composition shown above, clear images cannot be obtained.

以上の如く、本発明フエライ1−キャリアーは従来使用
されている鉄粉キトリアに比べ、高抵抗でかつ長寿命で
あることが判明し、電子写真用の現像材料どして卓越し
た効果を示しその工業的応用価値は大である。
As described above, the Feray 1-carrier of the present invention was found to have higher resistance and longer life than the conventionally used iron powder chitria, and exhibited excellent effects as a developing material for electrophotography. It has great industrial application value.

手続補正書(方式) %式% 補市をする者 名 称 +50111 1:I立金属株式会社代II台
河野 典夫 代   理   人 、   居  +ii    東京都千代111区丸の
内分丁目1計2号ン山  11:   の  文・I 
 象明細書 35
Procedural amendment (method) % formula % Name of the person making the supplemental market +50111 1: I Ritsu Metals Co., Ltd. II Norio Tai Kono Representative Director, residence +ii 1, Marunouchi Bun-chome, Chiyo 111-ku, Tokyo, No. 2 Nyama 11 : Sentence/I
elephant specification 35

Claims (1)

【特許請求の範囲】 1− MeF e12 01  (Meは、3aもしく
は3rを示す)で表わされる六方晶フエライ[・のマグ
ネ1〜ブランバイト構造を示すフェライ1〜のM eを
、1価または3価以上の金属のうちの1種または2種以
上で置換した組成またはMe FJ2  o+qの六方
晶フエライ[・に属するZタイプ3 az M e2 
V e24042、YタイプB az M O2F e
 2に?04gのフェロツクス・プレーナのBaおよび
M eのいずれか一部を、または両方を1価または2価
以上の金属のうち一種あるいは二種以上で置換した組成
からなり、電気抵抗率が10 Ω−cm以上で飽和磁化
値が100mu/’Q以上の特性を有し、平均粒径が1
0/1m−1000μmであることを特徴とする電子写
真用フェライ[・キ11リアー。 2、特許請求の範囲第1項記載のものにおいて、保磁力
Hcが1000e以下であることを特徴とする電子写真
用フェライトキトリアー 3、特許請求の範囲第1項または第2項記載のものにお
いで、透磁率μが10以上であることを特徴とする電子
写真用フエライIーキトリアー。 4、特許請求の範囲第1項、第2 gjまIζは第3項
記載のものにd3いて、キュリー温1u −1− Cが
50℃以上であることを特徴とする電子写真用フエライ
トキI7リアー。 5、特許請求の範囲第1項、第2項、第3項、または第
4項記載のものにおいで、粒子の強度が1000 g/
’cm  以上であることを特徴と覆る電子写真用フエ
ライトキ11リアー。 6、特許請求の範囲第1項、第2項、第3項、第4項、
または第5項記載のものに.13いて、粒子の表面を酸
化させたことを特徴とする電子写真用フェライ[・キ1
ノリアー。 7、特許請求の範囲第1項、第2項、第3項、第4項、
第5項、または第6項記載のものにおいて、粒子の表面
を樹脂等で被覆したことを特徴どづる電子写真用フェラ
イト・キ亀・リアー。
[Scope of Claims] 1-MeF e12 01 (Me represents 3a or 3r) of the hexagonal ferrite [.magne 1 ~ of the ferrite 1 showing the brambite structure] Me is monovalent or trivalent Z type 3 az M e2 belonging to the hexagonal crystal ferrite of Me FJ2
V e24042, Y type B az M O2F e
To 2? It has a composition in which a part or both of Ba and Me in the 04g ferrox planer is replaced with one or more metals of monovalent or divalent or higher valence, and has an electrical resistivity of 10 Ω-cm. The saturation magnetization value is 100 mu/'Q or more, and the average grain size is 1
An electrophotographic ferrite characterized by a diameter of 0/1 m to 1000 μm. 2. A ferrite kitria for electrophotography according to claim 1, characterized in that the coercive force Hc is 1000e or less; A Ferrite I-Kitoria for electrophotography is characterized in that its magnetic permeability μ is 10 or more. 4. Claims 1 and 2. A ferrite key I7 rear for electrophotography, characterized in that gj and Iζ are d3 as described in claim 3, and the Curie temperature 1u -1-C is 50°C or higher. . 5. Claims 1, 2, 3, or 4, wherein the particles have a strength of 1000 g/
Ferrite key 11 rear for electrophotography, which is characterized by being over 'cm. 6.Claims 1, 2, 3, 4,
or as described in Section 5. Ferrite for electrophotography [Ki1] characterized by having oxidized particle surfaces.
Noria. 7. Claims 1, 2, 3, 4,
A ferrite/rear for electrophotography as described in item 5 or 6, characterized in that the surface of the particles is coated with a resin or the like.
JP57128643A 1982-07-23 1982-07-23 Electrophotographic ferrite carrier Pending JPS5918955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57128643A JPS5918955A (en) 1982-07-23 1982-07-23 Electrophotographic ferrite carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57128643A JPS5918955A (en) 1982-07-23 1982-07-23 Electrophotographic ferrite carrier

Publications (1)

Publication Number Publication Date
JPS5918955A true JPS5918955A (en) 1984-01-31

Family

ID=14989886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57128643A Pending JPS5918955A (en) 1982-07-23 1982-07-23 Electrophotographic ferrite carrier

Country Status (1)

Country Link
JP (1) JPS5918955A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925762A (en) * 1987-08-17 1990-05-15 Basf Aktiengesellschaft Carrier for reprography and production of this carrier
JP4763216B2 (en) * 2000-05-17 2011-08-31 イーストマン コダック カンパニー Magnetic carrier particles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925762A (en) * 1987-08-17 1990-05-15 Basf Aktiengesellschaft Carrier for reprography and production of this carrier
JP4763216B2 (en) * 2000-05-17 2011-08-31 イーストマン コダック カンパニー Magnetic carrier particles

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