CN106630991B - 一种高磁导率铁氧体降低初始磁导率的两次烧结工艺 - Google Patents

一种高磁导率铁氧体降低初始磁导率的两次烧结工艺 Download PDF

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CN106630991B
CN106630991B CN201610845073.XA CN201610845073A CN106630991B CN 106630991 B CN106630991 B CN 106630991B CN 201610845073 A CN201610845073 A CN 201610845073A CN 106630991 B CN106630991 B CN 106630991B
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徐仲达
燕杰
陈志华
许锡坤
毕建国
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Zhejiang Chunhui Magnetoelectricity Technology Co ltd
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Abstract

本发明公开一种高磁导率铁氧体降低初始磁导率的两次烧结工艺，对高磁导率铁氧体产品进行一次烧结后，并拣选电感系数超标在20％以内的不合格品进行再次烧结，第二次烧结步骤如下：1）将一次烧结电感值超标在20％以内不合格品再次装窑；2）排胶段，控制室温升至450℃的时间为6.5h；3）升温段，控制450℃升至高温的时间为7.5h；4）保温段，每需降低10％电感系数相对于一次烧结保温段温度降低10℃，保温时间5.0h；5）冷却阶段，冷却阶段1050‑1110℃段氧含量相对于一次烧结冷却阶段氧含量降低0.2‑0.25％，降温冷却时间为9.0h。从而使一次烧结电感值超标在20％以内不合格品经过两次烧结变成满足要求的合格产品。

Description

一种高磁导率铁氧体降低初始磁导率的两次烧结工艺
技术领域
本发明涉及锰锌软磁铁氧体领域，尤其涉及一种高磁导率铁氧体降低初始磁导率的两次烧结工艺。
背景技术
高磁导率铁氧体产品（5K以上）的产品在一次烧结后往往有不少电感系数超过要求或批次电感系数超过要求的不合格品出现，不合格产品如报废会给企业造成很大的经济损失，每年都超过上百万元的损失。一次烧结工艺如下：1、装窑；2、排胶， 3、升温， 4、高温保温，根据产品不同选择1380-1400℃间的某一温度保持5h；5、降温,气氛保护冷却。
发明内容
本发明的目的在于提供一种高磁导率铁氧体降低初始磁导率（电感系数）的两次烧结工艺，使一次烧结电感系数超标在20％以内不合格品经过两次烧结变成满足要求的合格产品。
为了达到上述目的，本发明的技术方案是：一种高磁导率铁氧体降低初始磁导率的两次烧结工艺，对高磁导率铁氧体产品进行一次烧结后，并拣选电感系数超标在20％以内的不合格品进行再次烧结，第二次烧结步骤如下：
1）将一次烧结电感系数超标在20％以内不合格品再次装窑；
2）排胶段，控制室温升至450℃的时间为6.5h；
3）升温段，控制450℃升至高温的时间为7.5h；
4）保温段，每需降低10％电感系数相对于一次烧结高温保温段温度降低10℃，保温时 间为5.0h；
5）冷却阶段，冷却阶段1050-1110℃氧含量相对于一次烧结冷却阶段氧含量降低0.2- 0.25％。降温冷却时间为9.0h。
上述的一次烧结包括如下步骤：
1）装窑；
2）排胶段，从室温升至450℃的时间为6.5h；
3）升温段，从450℃升至高温的时间为7.5h；
4）保温段，根据产品不同选择1380-14000℃间的某一温度保持5h；
5、降温段，冷却阶段1050℃时氧含量0.1％，冷却阶段1060℃时氧含量0.15％，1080℃ 时氧含量0.45％；1110℃时氧含量0.65％。降温段冷却时间为9.0h。
上述的第二次烧结步骤如下：
1）将一次烧结电感值（初始磁导率）超标在20％以内不合格品再次装窑；
2）排胶段，控制室温升至450℃的时间为6.5h；
3）升温段，控制450℃升至高温的时间为7.5h；
4）保温段，相对于一次烧结保温段温度降低10-20℃，高温保温时间5.0h；
5）冷却阶段，1050℃时氧含量800ppm，冷却阶段1060℃时氧含量900ppm，1080℃时氧含 量0.25％；1110℃时氧含量0.45％。降温段冷却时间为9.0h。
本发明的有益效果是：使一次烧结电感系数超标在20％以内不合格品经过两次烧结变成满足要求的合格产品。
具体实施方式
实施例1
将RH7K（38*19*13）进行一次烧结包括如下步骤：装窑；排胶段6.5h将温度从室温升至 450℃；升温段7.5h将温度从450℃升至1390℃；保温段1390℃保温时间5.0h；冷却阶段， 1050℃时氧含量0.1％，1060℃时氧含量0.15％，1080℃时氧含量0.45％；1110℃时氧含量 0.65％。将电感系数超标在20％以内的不合格品再次装窑，排胶段6.5h将温度从室温升至 450℃，升温段7.5h将温度从450℃升至1370℃，保温段1370℃保温时间5.0h；冷却阶段， 1050℃时氧含量800ppm，冷却阶段1060℃时氧含量900ppm，1080℃时氧含量0.25％；1110℃ 时氧含量0.45％；降温段冷却时间为9.0h。
实施例2
将RH10K（38*24*22）进行一次烧结包括如下步骤：装窑；排胶段6.5h将温度从室温升至 450℃；升温段7.5h将温度从450℃升至1400℃；保温段1400℃保温时间5.0h；，冷却阶段， 1050℃时氧含量0.1％，1060℃时氧含量0.15％，1080℃时氧含量0.45％；1110℃时氧含量 0.65％。将电感系数超标在20％以内的不合格品再次装窑；排胶段6.5h将温度从室温升至 450℃；升温段7.5h将温度从450℃升至1380℃；保温段1380℃保温时间5.0h；冷却阶段， 1050℃时氧含量800ppm，冷却阶段1060℃时氧含量900ppm，1080℃时氧含量0.25％；1110℃ 时氧含量0.45％；降温段冷却时间为9.0h。
实例1、2（电感系数单位：nH/N2。测试条件：f=1KHz；N=10Ts；T=25±3℃）
Figure DEST_PATH_IMAGE001

Claims (1)

1.一种高磁导率铁氧体降低初始磁导率的两次烧结工艺，其特征在于：对高磁导率铁氧体产品进行一次烧结后，并拣选初始磁导率超标在20％以内的不合格品进行二次烧结，所述高磁导率铁氧体产品为RH7K型号的高磁导率铁氧体材料，将产品型号为38*19*13的RH7K进行一次烧结包括如下步骤：
装窑；
排胶段：6.5h将温度从室温升至 450℃；
升温段：7.5h将温度从450℃升至1390℃；
保温段：1390℃保温时间5.0h；
冷却阶段：1050℃时氧含量0.1％，1060℃时氧含量0.15％，1080℃时氧含量0.45％，1110℃时氧含量 0.65％；
将初始磁导率超标在20％以内的不合格品再次装窑，
排胶段：6.5h将温度从室温升至 450℃，
升温段：7.5h将温度从450℃升至1370℃，
保温段：1370℃保温时间5.0h；
冷却阶段：1050℃时氧含量800ppm，冷却阶段1060℃时氧含量900ppm，1080℃时氧含量0.25％，1110℃时氧含量0.45％；降温段冷却时间为9.0h。
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2613444B2 (ja) * 1988-07-26 1997-05-28 株式会社トーキン 感温フェライト製造方法
CN102674824A (zh) * 2012-05-29 2012-09-19 江门安磁电子有限公司 利用MnZn铁氧体磁心磨削废料制造MnZn铁氧体的方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2613444B2 (ja) * 1988-07-26 1997-05-28 株式会社トーキン 感温フェライト製造方法
CN102674824A (zh) * 2012-05-29 2012-09-19 江门安磁电子有限公司 利用MnZn铁氧体磁心磨削废料制造MnZn铁氧体的方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
高磁导率锌锰铁氧体的研发;朱巍;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20130415(第4期);第43页 *

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