CN101885966A - A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof - Google Patents

A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof Download PDF

Info

Publication number
CN101885966A
CN101885966A CN2010102347691A CN201010234769A CN101885966A CN 101885966 A CN101885966 A CN 101885966A CN 2010102347691 A CN2010102347691 A CN 2010102347691A CN 201010234769 A CN201010234769 A CN 201010234769A CN 101885966 A CN101885966 A CN 101885966A
Authority
CN
China
Prior art keywords
europium
powder
compound
strontium
fluorescent powder
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
CN2010102347691A
Other languages
Chinese (zh)
Inventor
张培新
陆正武
任祥忠
翁履谦
侯茜茜
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.)
Shenzhen University
Original Assignee
Shenzhen University
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 Shenzhen University filed Critical Shenzhen University
Priority to CN2010102347691A priority Critical patent/CN101885966A/en
Publication of CN101885966A publication Critical patent/CN101885966A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Luminescent Compositions (AREA)

Abstract

The present invention relates to a kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof.The chemical constitution of this composite phosphor is: (Xwt%) (Sr 1-yEu yAl 2Si 2O 8) (100-Xwt%) (Sr 2-yEu yAl 2SiO 7), X=30~70 wherein, y=0.01~0.05.The compound dissolution that accurately takes by weighing the compound of compound, aluminium of strontium and europium in proportion mixes with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made in deionized water or acid again with by tetraethoxy.Be adjusted to suitable pH value with acid, form colloidal sol; The colloidal sol oven dry is xerogel, forms reactive powder through calcining again, this powder is through wet-milling, and roasting at high temperature promptly gets the Sr-Al-Si series composite fluorescent powder of mixing europium.The present invention adopts a kind of chemical formulation and forms two kinds of different crystals simultaneously, by the visible light that to launch two to three kinds of different colours that excites to rare earth elements europium, can change two kinds of crystalline luminous intensities by adjusting chemical composition and maturing temperature, thereby adjust the luminescent properties of mixed light, can be used in the white light LED part.

Description

A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof
Technical field
The invention belongs to rare earth luminescent material manufacturing technology field, particularly a kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof.
Background technology
White light LEDs is a kind of solid-state semiconductor device that electric energy is converted into white light, have the efficient height, plurality of advantages such as volume is little, the life-span is long, safety, voltage are low, energy-saving and environmental protection, by people regard as after incandescent light, luminescent lamp, high-voltage gas discharging light the 4th generation lighting source, be used widely in fields such as backlight, demonstration, automobile, commerce and special lightings.
At present, realize that white light LEDs has multiple scheme.A kind of is how chip-shaped white light LEDs.This scheme needs the corresponding with it pilot circuit of many covers, causes cost to significantly improve; Because the rate of decay and the life-span of each chip have nothing in common with each other, cause the white light that forms in time photochromic and change, cause the white light LEDs life-span to have a greatly reduced quality.Another kind is a single-chip type white light LEDs.This method is to utilize the certain fluorescent material of coating on ultraviolet or the blue-light LED chip, by the conversion generation white light of fluorescent material.This scheme has been simplified the device of white light LEDs greatly, has saved cost.Wherein blue chip excites red, green emitting phosphor and ultraviolet or near ultraviolet chip to excite this dual mode of red, green, blue three primary colors fluorescent powder because color developing is good, has more vast potential for future development.Particularly ultraviolet or near ultraviolet chip excite this mode of red, green, blue three primary colors fluorescent powder owing to rich color, color developing are better, colour temperature can be prepared arbitrarily in 2500~10000K scope, and can break through the blockade of Japanese Patent, be present domestic and international research focus.
The rare earth doping fluorescent material is compared with corresponding non-rare-earth luminescent material, and its luminous efficiency and performance such as photochromic are all even better.And China is the resource and the big producing country of rare earth, has powerful resources advantage in the research of China's development rare-earth luminescent material.Fluorescent RE powder mainly is the development at monochromatic fluorescent material at present, and the mixing by each fluorescent material reaches the effect that emits white light again.The present invention adopts a kind of chemical formulation and forms two kinds of different crystals simultaneously, excite the visible light that to launch two to three kinds of different colours down by the rare earth elements europium doping in ultraviolet or near ultraviolet LED chip, can change two kinds of crystalline luminous intensities by adjusting chemical composition and maturing temperature, thereby adjust the luminescent properties of mixed light, can be used in the white light LED part.
Summary of the invention
The objective of the invention is to propose a kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof, its material composition characteristic is that its chemical constitution is (Xwt%) (Sr 1-yEu yAl 2Si 2O 8) (100-Xwt%) (Sr 2-yEu yAl 2SiO 7), X=30~70 wherein, y=0.01~0.05.Its preparation method concrete steps are as follows:
1) presses chemical constitution formula (Xwt%) (Sr 1-yEu yAl 2Si 2O 8) (100-Xwt%) (Sr 2-yEu yAl 2SiO 7), X=30~70 wherein, y=0.01~0.05 is a payment foundation, the compound dissolution that accurately takes by weighing the compound of compound, aluminium of a certain proportion of strontium and europium is in a certain amount of deionized water or acid, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, be adjusted to suitable pH value, heating also continues to stir formation colloidal sol.
2) place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain powder again.
3) with after the wet-milling of above-mentioned powder process, the oven dry,, after the cooling powder agglomates was pulverized 200 mesh sieves, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium at the high temperature kiln roasting.
The compound of said strontium is strontium nitrate, strontium chloride, strontium oxide or strontium hydroxide among the present invention, and the compound of aluminium is aluminum nitrate, aluminum chloride, aluminum oxide or aluminium hydroxide, and the compound of europium is europium nitrate, Europium trichloride, europium sesquioxide or europium hydroxide.
Adding the pH value that acid is adjusted to when forming colloidal sol among the present invention is 1~4.
Powder among the present invention is after wet-milling, oven dry, and the maturing temperature in High Temperature Furnaces Heating Apparatus is 1000~1500 ℃.
Mix in the Sr-Al-Si series composite fluorescent powder of europium at gained of the present invention, adopt a kind of chemical formulation and form two kinds of different crystals simultaneously, by the visible light that to launch two to three kinds of different colours that excites to rare earth elements europium, can change two kinds of crystalline luminous intensities by adjusting chemical composition and maturing temperature, thereby adjust the luminescent properties of mixed light, can be used in the white light LED part.
Description of drawings
Fig. 1 (64wt%) (Sr 0.99Eu 0.01Al 2Si 2O 8) (36wt%) (Sr 1.99Eu 0.01Al 2SiO 7) emmission spectrum of fluorescent material.
Fig. 2 (64wt%) (Sr 0.97Eu 0.03Al 2Si 2O 8) (36wt%) (Sr 1.97Eu 0.03Al 2SiO 7) emmission spectrum of fluorescent material.
Fig. 3 (36wt%) (Sr 0.97Eu 0.03Al 2Si 2O 8) (64wt%) (Sr 1.97Eu 0.03Al 2SiO 7) emmission spectrum of fluorescent material.
Embodiment
The present invention relates to a kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof.The chemical constitution of this composite phosphor is: (Xwt%) (Sr 1-yEu yAl 2Si 2O 8) (100-Xwt%) (Sr 2-yEu yAl 2SiO 7), X=30~70 wherein, y=0.01~0.05.The compound dissolution that accurately takes by weighing the compound of compound, aluminium of strontium and europium in proportion mixes with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made in deionized water or acid again with by tetraethoxy.Be adjusted to suitable pH value with acid, form colloidal sol; The colloidal sol oven dry is xerogel, forms reactive powder through 550 ℃ of calcinings again, this powder is through wet-milling, and roasting at high temperature promptly gets the Sr-Al-Si series composite fluorescent powder of mixing europium.
The compound of above-mentioned said strontium is strontium nitrate, strontium chloride, strontium oxide or strontium hydroxide, and the compound of aluminium is aluminum nitrate, aluminum chloride, aluminum oxide or aluminium hydroxide, and the compound of europium is europium nitrate, Europium trichloride, europium sesquioxide or europium hydroxide; Adding the pH value that acid is adjusted to when forming colloidal sol is 1~4.With reactive powder through wet-milling, oven dry after, be 1000~1500 ℃ in the temperature of high temperature kiln roasting.
Below by embodiment, further illustrate outstanding feature of the present invention and marked improvement, only be the present invention is described and never limit the present invention.
Embodiment 1
With strontium nitrate, aluminum nitrate, tetraethoxy and europium nitrate is starting raw material, is (64wt%) (Sr by chemical constitution 0.99Eu 0.01Al 2Si 2O 8) (36wt%) (Sr 1.99Eu 0.01Al 2SiO 7), accurately take by weighing a certain proportion of strontium nitrate, aluminum nitrate and europium nitrate and be dissolved in a certain amount of deionized water, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, adjust pH value to 3, heating also continues to stir formation colloidal sol; Place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain reactive powder again; Through after wet-milling, drying, 1000 ℃ of roastings in High Temperature Furnaces Heating Apparatus were pulverized 200 mesh sieves with powder agglomates after the cooling, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium with above-mentioned powder, and its emmission spectrum is seen Fig. 1.
Embodiment 2
With strontium chloride, aluminum chloride, tetraethoxy and Europium trichloride is starting raw material, is (64wt%) (Sr by chemical constitution 0.97Eu 0.03Al 2Si 2O 8) (36wt%) (Sr 1.97Eu 0.03Al 2SiO 7), accurately take by weighing a certain proportion of strontium chloride, aluminum chloride and Europium trichloride and be dissolved in a certain amount of deionized water, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, adjust pH value to 2, heating also continues to stir formation colloidal sol; Place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain reactive powder again; Through after wet-milling, drying, 1200 ℃ of roastings in High Temperature Furnaces Heating Apparatus were pulverized 200 mesh sieves with powder agglomates after the cooling, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium with above-mentioned powder, and its emmission spectrum is seen Fig. 2.
Embodiment 3
With strontium oxide, aluminum oxide, tetraethoxy and europium sesquioxide is starting raw material, is (36wt%) (Sr by chemical constitution 0.97Eu 0.03Al 2Si 2O 8) (64wt%) (Sr 1.97Eu 0.03Al 2SiO 7), accurately take by weighing a certain proportion of strontium oxide, aluminum oxide and europium sesquioxide and be dissolved in a certain amount of acid, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, adjust pH value to 1, heating also continues to stir formation colloidal sol; Place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain reactive powder again; Through after wet-milling, drying, 1400 ℃ of roastings in High Temperature Furnaces Heating Apparatus were pulverized 200 mesh sieves with powder agglomates after the cooling, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium with above-mentioned powder, and its emmission spectrum is seen Fig. 3.
Embodiment 4
With strontium nitrate, aluminum chloride, tetraethoxy and europium nitrate is starting raw material, is (44wt%) (Sr by chemical constitution 0.96Eu 0.04Al 2Si 2O 8) (56wt%) (Sr 1.96Eu 0.04Al 2SiO 7), accurately take by weighing a certain proportion of strontium nitrate, aluminum chloride and europium nitrate and be dissolved in a certain amount of deionized water, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, adjust pH value to 4, heating also continues to stir formation colloidal sol; Place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain reactive powder again; Through after wet-milling, drying, 1100 ℃ of roastings in High Temperature Furnaces Heating Apparatus were pulverized 200 mesh sieves with powder agglomates after the cooling, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium with above-mentioned powder.
Embodiment 5
With strontium hydroxide, aluminum oxide, tetraethoxy and europium nitrate is starting raw material, is (51wt%) (Sr by chemical constitution 0.95Eu 0.05Al 2Si 2O 8) (49wt%) (Sr 1.95Eu 0.05Al 2SiO 7), accurately take by weighing a certain proportion of strontium hydroxide, aluminum oxide and europium nitrate and be dissolved in a certain amount of acid, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, adjust pH value to 2, heating also continues to stir formation colloidal sol; Place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain reactive powder again; Through after wet-milling, drying, 1250 ℃ of roastings in High Temperature Furnaces Heating Apparatus were pulverized 200 mesh sieves with powder agglomates after the cooling, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium with above-mentioned powder.
Embodiment 6
With strontium nitrate, aluminium hydroxide, tetraethoxy and europium hydroxide is starting raw material, is (42wt%) (Sr by chemical constitution 0.98Eu 0.02Al 2Si 2O 8) (58wt%) (Sr 1.98Eu 0.02Al 2SiO 7), accurately take by weighing a certain proportion of strontium nitrate, aluminium hydroxide and europium hydroxide and be dissolved in a certain amount of acid, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, adjust pH value to 2, heating also continues to stir formation colloidal sol; Place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain reactive powder again; Through after wet-milling, drying, 1350 ℃ of roastings in High Temperature Furnaces Heating Apparatus were pulverized 200 mesh sieves with powder agglomates after the cooling, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium with above-mentioned powder.

Claims (4)

1. preparation method who mixes the Sr-Al-Si series composite fluorescent powder of europium, its chemical constitution is (Xwt%) (Sr 1-yEu yAl 2Si 2O 8) (100-Xwt%) (Sr 2-yEu yAl 2SiO 7), X=30~70 wherein, y=0.01~0.05.It is characterized in that may further comprise the steps:.
1) presses chemical constitution formula (Xwt%) (Sr 1-yEu yAl 2Si 2O 8) (100-Xwt%) (Sr 2-yEu yAl 2SiO 7), X=30~70 wherein, y=0.01~0.05 is a payment foundation, the compound dissolution that accurately takes by weighing the compound of compound, aluminium of a certain proportion of strontium and europium is in a certain amount of deionized water or acid, form solution, mix with the solubilized stable liquid phase that a certain proportion of deionized water, dehydrated alcohol are made into again with by tetraethoxy; Add acid then, be adjusted to suitable pH value, heating also continues to stir formation colloidal sol.
2) place baking oven to dry gained colloidal sol, form xerogel; 550 ℃ of calcinings down, obtain powder again.
3) with after the wet-milling of above-mentioned powder process, the oven dry,, after the cooling powder agglomates was pulverized 200 mesh sieves, promptly got the Sr-Al-Si series composite fluorescent powder of mixing europium at the high temperature kiln roasting.
2. a kind of preparation method who mixes the Sr-Al-Si series composite fluorescent powder of europium according to claim 1, it is characterized in that: the compound of said strontium is strontium nitrate, strontium chloride, strontium oxide or strontium hydroxide, the compound of aluminium is aluminum nitrate, aluminum chloride, aluminum oxide or aluminium hydroxide, and the compound of europium is europium nitrate, Europium trichloride, europium sesquioxide or europium hydroxide.
3. a kind of preparation method who mixes the Sr-Al-Si series composite fluorescent powder of europium according to claim 1 is characterized in that: adding the pH value that acid is adjusted to when forming colloidal sol is 1~4.
4. a kind of preparation method who mixes the Sr-Al-Si series composite fluorescent powder of europium according to claim 1 is characterized in that: powder is after wet-milling, oven dry, and the maturing temperature in High Temperature Furnaces Heating Apparatus is 1000~1500 ℃.
CN2010102347691A 2010-07-22 2010-07-22 A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof Pending CN101885966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102347691A CN101885966A (en) 2010-07-22 2010-07-22 A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010102347691A CN101885966A (en) 2010-07-22 2010-07-22 A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof

Publications (1)

Publication Number Publication Date
CN101885966A true CN101885966A (en) 2010-11-17

Family

ID=43072067

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010102347691A Pending CN101885966A (en) 2010-07-22 2010-07-22 A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof

Country Status (1)

Country Link
CN (1) CN101885966A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102061166A (en) * 2011-01-07 2011-05-18 华东师范大学 Method for synthesizing superfine ceramic fluorescent powder
CN107916104A (en) * 2017-11-16 2018-04-17 华南理工大学 The near-infrared luminous temperature sensing nano material of tetravalence chromium doping and its preparation and application
JP2018095783A (en) * 2016-12-15 2018-06-21 国立研究開発法人物質・材料研究機構 Phosphor and light emitting device
CN108949172A (en) * 2018-07-25 2018-12-07 河南大学 A kind of fluorescent powder and preparation method thereof of tunable radiation emitting color
CN109825286A (en) * 2019-03-08 2019-05-31 武汉工程大学 A kind of aluminosilicate fluorescent powder material and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1995276A (en) * 2006-12-18 2007-07-11 天津理工大学 Rare-earth alumo silicate matrix fluorescent material, and preparation method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1995276A (en) * 2006-12-18 2007-07-11 天津理工大学 Rare-earth alumo silicate matrix fluorescent material, and preparation method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WANG YINHAI ET AL.: "Synthesis of Long Afterglow Phosphor CaAl2SiO8:Eu2+,Dy3+ via Sol-Gel Techique and Its Optical Properties", 《JOURNAL OF RARE EARTHS》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102061166A (en) * 2011-01-07 2011-05-18 华东师范大学 Method for synthesizing superfine ceramic fluorescent powder
CN102061166B (en) * 2011-01-07 2013-08-07 华东师范大学 Method for synthesizing superfine ceramic fluorescent powder
JP2018095783A (en) * 2016-12-15 2018-06-21 国立研究開発法人物質・材料研究機構 Phosphor and light emitting device
CN107916104A (en) * 2017-11-16 2018-04-17 华南理工大学 The near-infrared luminous temperature sensing nano material of tetravalence chromium doping and its preparation and application
CN107916104B (en) * 2017-11-16 2020-08-18 华南理工大学 Tetravalent chromium doped near-infrared luminescent temperature detection nano material and preparation and application thereof
CN108949172A (en) * 2018-07-25 2018-12-07 河南大学 A kind of fluorescent powder and preparation method thereof of tunable radiation emitting color
CN108949172B (en) * 2018-07-25 2021-04-06 河南大学 Fluorescent powder with adjustable luminous color and preparation method thereof
CN109825286A (en) * 2019-03-08 2019-05-31 武汉工程大学 A kind of aluminosilicate fluorescent powder material and preparation method thereof

Similar Documents

Publication Publication Date Title
CN104726101B (en) White light LEDs single-substrate white launches fluorophosphate fluorescent material and preparation method
CN101402857B (en) Red luminous material for LED and producing process thereof
CN101851508A (en) Europium activated silicate green fluorescent powder and application thereof in white light emitting diode
CN101880528A (en) Single-matrix white fluorescent powder, manufacturing method thereof and light emitting device manufactured thereby
CN101885966A (en) A kind of Sr-Al-Si series composite fluorescent powder of mixing europium and preparation method thereof
CN102660284B (en) Manufacturing method of red nitride fluorescent powder for LED
CN102719242A (en) Fluoride-containing Mn<4+>-doped red-light material and preparation method thereof
CN102585831B (en) Europium-ion-excited fluoromolybdate red fluorescent powder and preparation method and application thereof
CN110028964B (en) Dysprosium-silicon synergistic apatite structure blue-light fluorescent powder for white light LED and preparation method thereof
CN103555327A (en) Near-ultraviolet excited double perovskite fluorescent powder for white light LED and preparation method thereof
CN101717635B (en) Red fluorescent powder for LED and preparation method thereof
CN101054521A (en) Red luminescence phosphor
CN101307228A (en) Chlorine-aluminosilicate fluorescent powder and method for preparing same
CN101899304B (en) Europium-doped SrAlSi oxynitride composite fluorescent powder and preparation method thereof
CN105368450A (en) Double-perovskite tungstate white light phosphor and preparation method thereof
CN105131953A (en) Rare earth ion doping novel polysilicate green fluorescent powder for near ultraviolet stimulated white light LED and preparation method of novel polysilicate green fluorescent powder
CN103881703B (en) A kind of preparation method of white light LEDs single-matrix fluorescent material
CN101760191B (en) High-brightness barium-silicate-based blue-green fluorescent powder for LED and high-temperature reducing preparation method thereof
CN101906301B (en) Red fluorescent powder and preparation method thereof and light-emitting diode light source device
CN103775873A (en) LED lamp with purple light transformed into white light and manufacturing method thereof
CN107541211A (en) Blue luminescent phosphor suitable near ultraviolet excitation and its preparation method and application
CN101824320A (en) Red fluorescent powder, preparation method and application thereof
CN101942301B (en) Phosphate red fluorescent powder for light-emitting diode and preparation method thereof
CN101619216B (en) Method for preparing SrMoO<4>:Eu<3> red luminescent material doped with sodium, silicon and yttrium
CN101565620B (en) Single-phase white-emitting phosphor based on near ultraviolet excitation and preparation method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20101117