Key laboratory for electronic materials and devices

Director Prof. Nguyen Huy Dan	MISSION: Fundamental and applied research on electronic materials and devices; training scientific human resources; expanding domestic and international cooperations MAIN RESEARCH DIRECTION: Electronic materials possessing special features (high coercivity, high permeability, total absorption of electromagnetic waves, large magnetocaloric effect, shape memory effect, multiferroic...); components for conversion and control devices (wind generators, electric vehicles, magnetic chiller, electromagnetic controller, magnetic diaphragm, electromagnetic sensors…).
	dannh@ims.vast.ac.vn	+84 912 772 339

1. Investigation of fabrication of hard magnetic and magnetocaloric alloys

• Technology process for producing (Nd, Dy)-Fe-B sintered magnets with high coercivity, H_c > 25 kOe, and high maximum energy product, (BH)_max > 30 MGOe, was established. The produced magnets were applied to electrical motors and generators (Fig. 1).

(a) (b)

(c)

Fig. 1. Images of as-sintered (Nd, Dy) -Fe-B magnets (a) and their magnetic charateristic curves (b); produced magnets used in electric motorbikes and wind generators (c).

• Rare earth-free hard magnetic nanocomposites, Mn-(Bi, Ga) based magnets, with  maximum energy product (BH)_max ~ 5 MGOe were fabricated.
• Heusler (Ni-Mn-Sn, Ni-Co-Mn-Al…) and rapidly quenched (La-Fe-Si, Fe-Cr-Zr-B…) alloys with large magnetocaloric effect at room temperature region were successfully prepared.

2. Basic research on structural, electrical and magnetic characteristics of perovskite materials

• La_1-xA_xMn_1-yB_yO₃ (A = Na, K, Ca, Sr, Ba, Pr, Sm; B = Co, Al, Ti) perovskites with large magnetocaloric effect at room temperature region were successfully fabricated.
• Magnetic phase transitions and magnetic orders in the perovskites were controlled by changing the crystalline size and/or substituent.
• Magnetoresistance effect, magnetocaloric effect and Griffiths phase phenomenon of manganese-based perovskite materials were observed. Relationships between their electromagnetic effects were given out.

1. MIDDLE FREQUENCY FURNACE ZG-0.01J

* Introduction
Middle Frequency Furnace ZG-0.01J: melting alloys under the protective environment.
- Made in China
- Model: ZG-0.01J
* Main technical parameters
+ Sample Capacity per batch: 2-10 kg
+ Maximum Temp.: 1700^oC
+ Power: 50 kW
+ High vacuum: up to 6.6.10^-3 Pa
+ Frequency: 4 kHz
+ Working environment: inert gases
+ Cooling mold: pouring into the cooler

2. PEX-100 x 125 ALL SEALED PRE-CRUSHER

* Introduction
- The PEX-100 x 125 All Sealed Pre-Crusher: making middle size of NdFeB magnetic powder.
- Made in China
- Model: PEX-100 x 125
* Main technical parameters
+ Input hole size: 100 x 125 mm
+ Input particle size: ~20 mm
+ Output particle size: 2-4 mm
+ Yield: 80 kg/h
+ Power of motor: 3 kW
+ Working environment: inert gas

3. DSB F 500 x 650 ALL SEALED MIDDLE CRUSHER

* Introduction
- The DSB ф 500 x 650 All Sealed middle crusher: making NdFeB powder. The product powder is suitable to Jet Mill machine as the raw materials.
- Made in China
- Model: DSB ф 500 x 650
* Main technical parameters
+ Cylinder body (inner diameter x length): ф 500 x 650 mm
+ Rotary speed of cylinder: 48 r/min.
+ Input particle size: 2-4 mm
+ Output particle size: 200-300 mm
+ Yield: 30-40 kg/h
+ Power of motor: 3 kW
+ Working environment: inert gas

4. FLUIDIZED BED OPPOSED JET MILL QLMR-260

* Introduction
- The Fluidized Bed Opposed JET Mill QLMR-260: making fine powder using in NdFeB magnet production.
- Made in China
- Model: QLMR-260
* Main technical parameters
+ Feeding grain size: <0.4 mm
+ Output grain size: 5-10 mm
+ Yield: 10 kg/h
+ Consumption of nitrogen: < 20 m³/h
+ Consumption of power: 70 kW
+ Total recovering rate of powder: >99%
+ Oxygen contains in system: <100 ppm

5. ZCY25-200 AUTOMATIC PRESS WITH MAGNETIC FIELD

* Introduction
- The ZCY25-200 Automatic Press: pressing NdFeB magnetic powder in magnetic field.
- Made in China
- Model: ZCY25-200
* Main technical parameters
+ Max. operation pressure: 250 MPa
+ Rated pressure of hydraulic system: 15 MPa
+ Diameter of the electromagnetic iron core: 200 mm
+ Distance between two poles: 0-160 mm
+ Magnetic field strength:  2T (at the distance of 10 mm)
+ Peak power of the electromagnet: 15 kW
+ Rated power of motor: 5.5 kW

6. DJY-120 ISOSTATIC PRESS

* Introduction
- The DYJ-120 Isostatic Press: pressing NdFeB magnetic powder in isostatic pressure after die pressed.
- Made in China
- Model: DYJ-120
* Main technical parameters
+ Max. isostatic pressure of upper cylinder: 230 MPa
+ Size of high pressure tank: F 120x200
+ Max. force of punch: 3200 kN
+ Diameter of punch: 400
+ Rated pressure of hydraulic system: 23 MPa
+ Press area: 1500 x 2500 mm²
+ Press weight: ~ 6 ton
+ Rated power of motor: 7.5 kW

7. 15 KG VACUUM SINTERING FURNACE RVS-TYPE

* Introduction
- RVS-15kg Vacuum Sintering Furnace: sintering furnace for NdFeB magnet with high vacuum and enforced cooling.
- Made in China
- Model: RVS-15kg
* Main technical parameters
+ Sample Capacity: 1-15 kg
+ Temp. range: 300 – 1200 ^oC (± 5^oC)
+ Power: 30 kW
+ High vacuum: up to 2.10^-3 Pa
+ Working environment: high vacuum or positive/negative pressure with Ar, He gases
+ Cooling mode: natural/enforced cooling with inert gas filling
- Requirements: no oxygen in the furnace or sintering samples put in sealed boxes

8. LINDBERG/BLUE M THREE-ZONE TUBE FURNACES

* Introduction
-Three-zone tube furnaces feature three 16-segment programmable controllers-one for each zone.
- Furnaces include K-type thermocouple (one per zone) and a set of tube adapters for the largest size tube the furnace will accept.
- The system can be manually operated or computerized by using an RS-485 communications port.
* Main technical parameters
+ Temp range: 200 to 1100^oC
+ Chamber size: Three zones: 9", 18", 9"
+ Accepts 3" to 6" OD process tubes
+ Control type: Three, 16-segment
+ Temp. uniformity: ± 1.0^oC over 14"
+ Temp. control accuracy: ± 3^oC over 3-5/16" segment
+ Overall dimensions: 54"W x 26"H x 22"D
+ Power: AC 208/240V, 50/60 Hz, 11KW.

9. HIGH TEMPERATURE VACUUM FURNACE GSL1600-80X

* Introduction
GSL1600-80X tubing furnace is a precision bench-top furnace using MoSi₂ as heating elements.  It is widely used for materials or chemical lab to sinter all types of new materials samples under vacuum or other gases condition.  The temperature of GSL160-80X tubing furnace is controlled by high precision controller with accuracy ±1^oC and 51 segments programmable up to 1600^oC (2912 ^oF).
* Main technical parameters
- Tube materials: high purity Al₂O₃ ceramic
- Tube mize: ID: 70mm; OD: 80mm in diameter x 1000 mm length
- Max.working temperature: 1600^oC (2912^oF);
- Normal working temperature: 1500^oC (2732^oF)
- Max.heating rate: 10^oC/min
- Constant temperature zone (Hot zone): 150mm
- Temperature accuracy:  ±1^oC
- Input: single phase, 220V AC, 50/60 Hz
- Output: max. 5KW
- Dimension: 550 L x 450 W x 670 H  mm ( 21.7" L x 17.7" W x 26.4" H )

10. ULTRA HIGH RESOLUTION SCANNING ELECTRON MICROSCOPY FESEM S-4800

11. X-RAY DIFFRACTOMETER EQUINOX 5000

12. Hệ phún xạ Eniver 400

13. LITHOGRAPHY EQUIPMENT URE-2000S