IN2012DE00365A - - Google Patents

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Publication number
IN2012DE00365A
IN2012DE00365A IN365DE2012A IN2012DE00365A IN 2012DE00365 A IN2012DE00365 A IN 2012DE00365A IN 365DE2012 A IN365DE2012 A IN 365DE2012A IN 2012DE00365 A IN2012DE00365 A IN 2012DE00365A
Authority
IN
India
Prior art keywords
alumina
produced
slurry
cast
methyl cellulose
Prior art date
Application number
Inventor
Papiya Biswas Mrs
Kotikalapudi Rajeswari Mrs
Vittal Mahender Mr
Pandu Ramavath Mr
Anumandla Rajashekhar Reddy Mr
Johnson Dr Roy
Nair Saraswathy Hareesh Dr Unnikrishan
Original Assignee
Internat Advanced Res Ct For Powder Metallurg And New Materials Arci
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.)
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Publication date
Application filed by Internat Advanced Res Ct For Powder Metallurg And New Materials Arci filed Critical Internat Advanced Res Ct For Powder Metallurg And New Materials Arci
Priority to IN365DE2012 priority Critical patent/IN2012DE00365A/en
Publication of IN2012DE00365A publication Critical patent/IN2012DE00365A/en

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Abstract

IR transparent polycrystalline alumina articles having sintered grain sizes averaging in the sub-micrometer region and capable of transmitting >75% of infrared radiation of wavelengths between 3 and 5 micrometers can be produced by employing the thermal gelation property of methyl cellulose. In this process high purity alumina (99.96%) doped with 500ppm of MgO were made into a slurry with solid loading of 76-80wt% and further 0.1-0.5wt% of methyl cellulose was added followed by milling. The slurry was cast into a mould and subjected to thermal gelation temperature of 45-60°C to obtain the green alumina ceramics. The cast alumina ceramics thus produced through the environmentally benign process on sintering and hot isostatic pressing resulted in IR transparent polycrystalline alumina. Thus produced articles of thickness 1-1.4mm have exhibited close to theoretical IR transmission of 80-85% and a hardness of >20GPa.
IN365DE2012 2012-02-09 2012-02-09 IN2012DE00365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IN365DE2012 IN2012DE00365A (en) 2012-02-09 2012-02-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN365DE2012 IN2012DE00365A (en) 2012-02-09 2012-02-09

Publications (1)

Publication Number Publication Date
IN2012DE00365A true IN2012DE00365A (en) 2015-04-10

Family

ID=54393744

Family Applications (1)

Application Number Title Priority Date Filing Date
IN365DE2012 IN2012DE00365A (en) 2012-02-09 2012-02-09

Country Status (1)

Country Link
IN (1) IN2012DE00365A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113716951A (en) * 2021-08-26 2021-11-30 新沂市锡沂高新材料产业技术研究院有限公司 Preparation method of YAG-based transparent ceramic with large-size sheet composite structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113716951A (en) * 2021-08-26 2021-11-30 新沂市锡沂高新材料产业技术研究院有限公司 Preparation method of YAG-based transparent ceramic with large-size sheet composite structure

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