CN109020560A - A kind of hydro-thermal treatment method of ceramic oxide composite granule - Google Patents
A kind of hydro-thermal treatment method of ceramic oxide composite granule Download PDFInfo
- Publication number
- CN109020560A CN109020560A CN201811177241.8A CN201811177241A CN109020560A CN 109020560 A CN109020560 A CN 109020560A CN 201811177241 A CN201811177241 A CN 201811177241A CN 109020560 A CN109020560 A CN 109020560A
- Authority
- CN
- China
- Prior art keywords
- hydro
- oxide composite
- thermal
- treatment method
- composite granule
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
- C04B35/62655—Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a kind of hydro-thermal treatment method of ceramic oxide composite granule, include the following steps: 1) to weigh oxide raw material by the required proportion of ceramics；2) oxide raw material is packed into ball grinder, is sufficiently mixed ball milling after deionized water or alcohol is added, the slurry obtained after ball milling is placed in drying box and is dried, oxide composite powder is obtained；3) oxide composite powder is added in reaction kettle, a certain amount of deionized water is added, adds one of ammonium hydroxide, citric acid or oxalic acid or any several composition, closed reactor, then heating carries out hydro-thermal process, and the powder after hydro-thermal process is dried in drying box.The present invention has material utilization amount few, at low cost, and pollution is small, and technique is simpler, the good feature of technology stability.
Description
Technical field
The present invention relates to a kind of processing method of ceramic oxide composite granule, especially a kind of ceramic oxide composite powder
The hydro-thermal treatment method of body.
Background technique
The composition of ceramics has generally included several oxide raw materials even ten several oxide raw materials, has in ceramic formula
A little oxide raw material accountings are extremely low, from a few percent to some thousandths of etc..And these oxide raw materials are due to manufacturer
Different, production batch difference, preparation method difference cause particle size differences very big, and the granularity of oxide raw material is substantially several
Micron is between tens microns.How the bulky grain oxide raw material being added on a small quantity to be evenly spread in ceramics, is scientific research technology
Personnel's focus of attention.
Now currently, generalling use ball-milling method for the processing of oxide raw material in actual production to carry out, but ball milling
Method is only capable of for oxide raw material being milled to 1 microns, although the requirement of most of applications is met, some high
Under the application at end, the requirement of client is also not achieved using the performance that ball-milling technology prepares ceramics.There is useization in recent years
The means such as co-precipitation, sol-gel method are learned to synthesize superfine oxide composite granule, to promote the performance of ceramics.But still
Ideal effect is not obtained so.And hydro-thermal method is method new for one kind of ceramic oxide composite granule processing at present,
The treatment effect of oxide composite powder can be further increased.But now current hydro-thermal method still has many defects, it is main
Be embodied in: 1, now current hydro-thermal method must be raw material using the soluble-salt (predominantly nitrate) of doped chemical, with alkali
It is reacted, oxide is finally made, but the price of soluble-salt is much more expensive than oxide, increase the original of ceramics
Expect cost；2, the amount of the final oxide obtained of the soluble-salt of doped chemical be the amount of soluble-salt sub-fraction (with
For soluble nitrate-cabaltous nitrate hexahydrate of cobalt oxide, after the completion of processing cobalt oxide be 26%, remaining 74% be nitrate anion
And the crystallization water), therefore, a large amount of soluble-salt and alkali is needed to be reacted when preparing oxide, further increases ceramics
Cost of material, meanwhile, a large amount of acid group is contained in waste liquid, environmental pollution is larger；3, the reaction system of soluble-salt and alkali is more
Add complexity, condition is harsher, the more difficult assurance of the stability of the technique in treatment process.
Summary of the invention
The object of the present invention is to provide a kind of hydro-thermal treatment methods of ceramic oxide composite granule.The present invention has
Material utilization amount is few, at low cost, and pollution is small, and technique is simpler, the good feature of technology stability.
Technical solution of the present invention: a kind of hydro-thermal treatment method of ceramic oxide composite granule includes the following steps:
1) oxide raw material is weighed by the required proportion of ceramics；
2) oxide raw material is packed into ball grinder, is sufficiently mixed ball milling after deionized water or alcohol is added, will obtained after ball milling
To slurry be placed in drying box and dry, obtain oxide composite powder；
3) oxide composite powder is added in reaction kettle, a certain amount of deionized water is added, adds ammonium hydroxide, citric acid
Or then one of oxalic acid or any several composition, closed reactor heat and carry out hydro-thermal process, after hydro-thermal process
Powder is dried in drying box.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, in step 2), the slurry is at 60-120 DEG C
Drying box in dry.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, the slurry are dried in 70 DEG C of drying box
It is dry.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, in step 3), the reactant of the hydro-thermal process
In system, the concentration of one of ammonium hydroxide, citric acid or oxalic acid or any several composition is 0.5-2mol/L.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, in the reaction system of the hydro-thermal process, ammonium hydroxide,
The concentration of one of citric acid or oxalic acid or any several composition is 1mol/L.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, in step 3), the processing temperature of the hydro-thermal process
Degree is 200-400 DEG C；The processing time of the hydro-thermal process is 5-25h.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, the treatment temperature of the hydro-thermal process are 300 DEG C；
The processing time of the hydro-thermal process is 15h.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, in step 3), the powder after the hydro-thermal process
It is to be dried in 60-80 DEG C of drying box.
The hydro-thermal treatment method of ceramic oxide composite granule above-mentioned, the powder after the hydro-thermal process is at 70 DEG C
It is dried in drying box.
Beneficial effects of the present invention
Compared with the means such as co-precipitation, sol-gel method, hydro-thermal method, the present invention passes through directly using oxide as original
Material is handled, and cost of material can be greatly reduced；Simultaneously as being directly to be handled oxide to be aoxidized
Object almost without the loss of raw material, but needs the amount of how many oxide raw material just to be handled with how many raw material, significantly
The dosage for reducing material, further reduces costs；In addition, inorganic agent dosage is few in treatment process of the present invention, generation is given up
Liquid is few, greatly reduces the pollution level to environment；In addition, the present invention is directly handled using oxide, technique is simpler
Single, the stability of technique is more preferable.
Compared with traditional ball-milling method, oxide raw material produced by the present invention is more evenly distributed, diameter of particle is smaller, granularity point
Cloth range is narrower, specific surface area is bigger, activity is stronger, and therefore, the performance of ceramics obtained is more preferable after doping.
To further illustrate beneficial effects of the present invention, applicant devises following experiment:
Experimental example
1, experimental method: four groups of experiments are arranged in this experimental example altogether, and every group is according to conventional ZnO voltage-sensitive ceramic manufacture craft
ZnO voltage-sensitive ceramic is made, the ZnO voltage-sensitive ceramic piece of first group of oxide raw material for traditional ball-milling technology processing, second group is
The ZnO voltage-sensitive ceramic piece of the oxide raw material of 1 the method for embodiment of the present invention processing, third group are the doping embodiment of the present invention
The ZnO voltage-sensitive ceramic piece of the oxide raw material of 2 the methods processing, the 4th group is at doping 3 the method for the embodiment of the present invention
The ZnO voltage-sensitive ceramic piece of the oxide raw material of reason, four groups of potsherds are prepared according to this field customary preparation methods, and four groups
Voltage-sensitive ceramic piece is all made of IEC61643-11:2011, UL1449-3rd, GB188022.1-2005 and YD1235.1-2002 survey
Test-object is quasi-, respectively to the maximum working volts alternating current of four groups of voltage-sensitive ceramic pieces, maximum direct-current working volts, nominal discharge current,
Maximum discharge current and steady damp heat measure.
Experimental result: table 1 is four groups of potsherd experimental data contrast tables, as can be seen from Table 1: being implemented through the present invention
The nominal discharge current of the ZnO voltage-sensitive ceramic piece of example the method processing improves 25%, and residual voltage ratio reduces 10%, heat resistance
Performance improves 200%.Illustrate that oxide composite powder processed by the invention is reducing ceramic cost, reduces environment dirt
On the basis of contaminating and ensure that technology stability, the also biggish performance for improving adulterated ceramics.
1: four group of potsherd experimental data contrast table of table
Detailed description of the invention
Attached drawing 1 is the grain of the ZnO voltage-sensitive ceramic oxide raw material powder by conventional solid-state method and hydro-thermal method of the present invention preparation
Spend cumulative distribution table；
Attached drawing 2 is the scanning electron microscope (SEM) photograph of the ZnO voltage-sensitive ceramic oxide raw material powder of conventional solid-state method preparation；
Attached drawing 3 is the scanning electron microscope (SEM) photograph of the ZnO voltage-sensitive ceramic oxide raw material powder prepared by hydro-thermal method of the present invention.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
The embodiment of the present invention
Embodiment 1: a kind of hydro-thermal treatment method of ceramic oxide composite granule includes the following steps:
1) oxide raw material is weighed by the required proportion of ceramics；
2) oxide raw material is packed into ball grinder, is sufficiently mixed ball milling after deionized water is added, the slurry that will be obtained after ball milling
Material, which is placed in 70 DEG C of drying box, dries, and obtains oxide composite powder；
3) oxide composite powder is added in reaction kettle, deionized water is added in 1:1 in mass ratio, adds ammonium hydroxide, close
Reaction kettle is closed, then heating carries out hydro-thermal process, and the treatment temperature of hydro-thermal process is 300 DEG C；When the processing of the hydro-thermal process
Between be 15h, in the reaction system of hydro-thermal process, the concentration of ammonium hydroxide is 1mol/L, drying of the powder at 70 DEG C after hydro-thermal process
It is dried in case.
Embodiment 2: a kind of hydro-thermal treatment method of ceramic oxide composite granule includes the following steps:
1) oxide raw material is weighed by the required proportion of ceramics；
2) oxide raw material is packed into ball grinder, is sufficiently mixed ball milling after deionized water is added, the slurry that will be obtained after ball milling
Material, which is placed in 60 DEG C of drying box, dries, and obtains oxide composite powder；
3) oxide composite powder is added in reaction kettle, deionized water is added in 1:0.5 in mass ratio, adds lemon
Acid, closed reactor, then heating carries out hydro-thermal process, and the treatment temperature of hydro-thermal process is 200 DEG C；The place of the hydro-thermal process
The reason time is 25h, and in the reaction system of hydro-thermal process, the concentration of citric acid is 0.5mol/L, and the powder after hydro-thermal process is 60
DEG C drying box in dry.
Embodiment 3: a kind of hydro-thermal treatment method of ceramic oxide composite granule includes the following steps:
1) oxide raw material is weighed by the required proportion of ceramics；
2) oxide raw material is packed into ball grinder, is sufficiently mixed ball milling after alcohol is added, the slurry obtained after ball milling is put
It sets and is dried in 80 DEG C of drying box, obtain oxide composite powder；
3) oxide composite powder being added in reaction kettle, deionized water is added in 1:0.8 in mass ratio, oxalic acid is added,
Closed reactor, then heating carries out hydro-thermal process, and the treatment temperature of hydro-thermal process is 250 DEG C；The processing of the hydro-thermal process
Time is 20h, and in the reaction system of hydro-thermal process, the concentration of oxalic acid is 0.8mol/L, and the powder after hydro-thermal process is at 65 DEG C
It is dried in drying box.
Embodiment 4: a kind of hydro-thermal treatment method of ceramic oxide composite granule includes the following steps:
1) oxide raw material is weighed by the required proportion of ceramics；
2) oxide raw material is packed into ball grinder, is sufficiently mixed ball milling after alcohol is added, the slurry obtained after ball milling is put
It sets and is dried in 100 DEG C of drying box, obtain oxide composite powder；
3) by oxide composite powder be added reaction kettle in, 1:1.3 in mass ratio be added deionized water, add ammonium hydroxide and
The mass ratio of oxalic acid is the composition of 1:1, and closed reactor, then heating carries out hydro-thermal process, the treatment temperature of hydro-thermal process
It is 350 DEG C；The processing time of the hydro-thermal process is 10h, and in the reaction system of hydro-thermal process, the mass ratio of ammonium hydroxide and oxalic acid is
The concentration of the composition of 1:1 is 1.5mol/L, and the powder after hydro-thermal process is dried in 75 DEG C of drying box.
Embodiment 5: a kind of hydro-thermal treatment method of ceramic oxide composite granule includes the following steps:
1) oxide raw material is weighed by the required proportion of ceramics；
2) oxide raw material is packed into ball grinder, is sufficiently mixed ball milling after alcohol is added, the slurry obtained after ball milling is put
It sets and is dried in 120 DEG C of drying box, obtain oxide composite powder；
3) by oxide composite powder be added reaction kettle in, 1:1.5 in mass ratio be added deionized water, add ammonium hydroxide,
The mass ratio of citric acid and oxalic acid is the composition of 1:1:1, and closed reactor, then heating carries out hydro-thermal process, hydro-thermal process
Treatment temperature be 400 DEG C；The processing time of the hydro-thermal process is 5h, in the reaction system of hydro-thermal process, ammonium hydroxide, citric acid
The concentration for the composition that mass ratio with oxalic acid is 1:1:1 is 2mol/L, and the powder after hydro-thermal process is in 80 DEG C of drying box
Drying.
Claims (9)
1. a kind of hydro-thermal treatment method of ceramic oxide composite granule, which comprises the steps of:
1) oxide raw material is weighed by the required proportion of ceramics；
2) oxide raw material is packed into ball grinder, ball milling is sufficiently mixed after deionized water or alcohol is added, by what is obtained after ball milling
Slurry is placed in drying box and dries, and obtains oxide composite powder；
3) oxide composite powder is added in reaction kettle, a certain amount of deionized water is added, adds ammonium hydroxide, citric acid or grass
One of acid or any several composition, closed reactor, then heating carries out hydro-thermal process, the powder after hydro-thermal process
It is dried in drying box.
2. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 1, it is characterised in that: step 2)
In, the slurry is dried in 60-120 DEG C of drying box.
3. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 2, it is characterised in that: the slurry
It is to be dried in 70 DEG C of drying box.
4. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 1, it is characterised in that: step 3)
In, in the reaction system of the hydro-thermal process, the concentration of one of ammonium hydroxide, citric acid or oxalic acid or any several composition
For 0.5-2mol/L.
5. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 4, it is characterised in that: the hydro-thermal
In the reaction system of processing, the concentration of one of ammonium hydroxide, citric acid or oxalic acid or any several composition is 1mol/L.
6. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 1, it is characterised in that: step 3)
In, the treatment temperature of the hydro-thermal process is 200-400 DEG C；The processing time of the hydro-thermal process is 5-25h.
7. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 6, it is characterised in that: the hydro-thermal
The treatment temperature of processing is 300 DEG C；The processing time of the hydro-thermal process is 15h.
8. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 1, it is characterised in that: step 3)
In, the powder after the hydro-thermal process is dried in 60-80 DEG C of drying box.
9. the hydro-thermal treatment method of ceramic oxide composite granule according to claim 8, it is characterised in that: the hydro-thermal
Treated, and powder is dried in 70 DEG C of drying box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177241.8A CN109020560A (en) | 2018-10-10 | 2018-10-10 | A kind of hydro-thermal treatment method of ceramic oxide composite granule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177241.8A CN109020560A (en) | 2018-10-10 | 2018-10-10 | A kind of hydro-thermal treatment method of ceramic oxide composite granule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109020560A true CN109020560A (en) | 2018-12-18 |
Family
ID=64616443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811177241.8A Pending CN109020560A (en) | 2018-10-10 | 2018-10-10 | A kind of hydro-thermal treatment method of ceramic oxide composite granule |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109020560A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122021A (en) * | 1989-09-30 | 1991-05-24 | Osaka Titanium Co Ltd | Oxide powder for piezoelectric porcelain and production of piezoelectric porcelain |
| CN101127266A (en) * | 2007-09-12 | 2008-02-20 | 山东中厦电子科技有限公司 | High evenness negative temperature coefficient heat-sensitive resistance material and its preparation method |
| CN101613123A (en) * | 2009-08-05 | 2009-12-30 | 邢长生 | The hydrothermal synthesis method of IVB family metal oxide |
| CN102498080A (en) * | 2009-04-10 | 2012-06-13 | 埃斯托股份有限公司 | Hydrothermal processing in the wet-chemical preparation of mixed metal oxide ceramic powders |
-
2018
- 2018-10-10 CN CN201811177241.8A patent/CN109020560A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122021A (en) * | 1989-09-30 | 1991-05-24 | Osaka Titanium Co Ltd | Oxide powder for piezoelectric porcelain and production of piezoelectric porcelain |
| CN101127266A (en) * | 2007-09-12 | 2008-02-20 | 山东中厦电子科技有限公司 | High evenness negative temperature coefficient heat-sensitive resistance material and its preparation method |
| CN102498080A (en) * | 2009-04-10 | 2012-06-13 | 埃斯托股份有限公司 | Hydrothermal processing in the wet-chemical preparation of mixed metal oxide ceramic powders |
| CN101613123A (en) * | 2009-08-05 | 2009-12-30 | 邢长生 | The hydrothermal synthesis method of IVB family metal oxide |
Non-Patent Citations (3)
| Title |
|---|
| 尹邦跃: "《陶瓷核燃料工艺》", 31 January 2016, 哈尔滨工程大学出版社 * |
| 谢宇: "《变化莫测的分子王国——化学工业》", 31 January 2010, 百花洲文艺出版社 * |
| 马仁君等: "固相球磨-水热法制备Mn1.56Co0.96Ni0.48O4纳米粉体及其NTC性能", 《功能材料》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109368702B (en) | Preparation method of tungsten-bronze-structured cesium tungstate | |
| CN101550001B (en) | Yttrium zirconium composite nano-ceramic powder and preparation method thereof | |
| CN104261462B (en) | A kind of preparation method of micro-nano tindioxide solid sphere | |
| CN106297956A (en) | A kind of crystal silicon solar energy battery positive silver paste and preparation method thereof | |
| CN111477949B (en) | Lithium ion solid electrolyte with superstructure | |
| CN110842191A (en) | Silver powder with high sintering activity and preparation method and application thereof | |
| CN104464882B (en) | A kind of photovoltaic cell silver slurry and sintering method thereof | |
| CN103601235B (en) | A kind of mechanochemical reaction synthesis of nano SrTiO 3powder method | |
| CN101450796A (en) | Nano bamboo carbon powder and preparation method thereof | |
| CN105467079A (en) | Preparation method of ZnO and SnO2 core-shell structured microspheres | |
| Ganguly et al. | Sol-Gel microsphere pelletization process for fabrication of high-density ThO2—2% UO2 fuel for advanced pressurized heavy water reactors | |
| CN110224167A (en) | A kind of sol-gel auto-combustion method prepares bismuth oxide-lanthanum molybdate composite electrolyte method | |
| CN109020560A (en) | A kind of hydro-thermal treatment method of ceramic oxide composite granule | |
| CN103887373A (en) | Production process of gradient band gap CIGS solar cell light absorption layer by adopting anti-vacuum method | |
| CN101717118B (en) | Method for preparing CuCrS2 nano powder | |
| CN107473737B (en) | Composite zirconia powder for solid oxide fuel cell and preparation method thereof | |
| CN108863344A (en) | A kind of preparation process of high-performance ZnO voltage-sensitive ceramic | |
| CN107492647A (en) | Lithium ion battery negative material, cathode material preparation method and lithium ion battery | |
| CN111362682A (en) | Permanent magnetic ferrite magnetic shoe and manufacturing method and using method thereof | |
| CN105970323A (en) | Antistatic powder and preparation method thereof | |
| CN106784773A (en) | A kind of preparation method of electrode material | |
| CN102569439A (en) | Environment-friendly and non-toxic crystalline silicon solar cell back surface field paste and preparation method thereof | |
| CN102275973A (en) | Preparation method of basic copper carbonate microspheres | |
| CN101555134B (en) | Manufacturing technique of yttrium zirconium composite nanometre ceramic powder for optical fibre lock pin and ferrule | |
| CN109020500A (en) | A kind of preparation process of high-precision NTC thermal sensitive ceramics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |