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Polycrystal translucent alumina ceramic tube (PCA tube) and electric arc tube
 

PCA tube for ceramic metal halide lamp

It is the extremely pure sintered aluminum oxide ceramic tube with an exceptional degree of translucency. This discharge tube is made of high temperature alumina (α-Al2O3). They are used in making translucent ceramic arc tubes for ceramic metal halide lamp (CMH lamp) which is also called ceramic discharge metal halide lamp (CDM lamp). This kind of lamp is with many advantages such as excellent color rendering, high color stability and light color consistency, high light efficiency and long life. The lamps are in high demands and widely used for grow lighting, road lighting, stadium lighting, shopping mall lighting and etc.

Measuring unit: mm

Model a b c d e f g h j k1/k2 m1/m2 Internal surface area Wall load
M5-150 52.2±0.2 22.24 6.75 13.0±0.15 3.0±0.1 1.0+0.05 0.90±0.1 6.50 2.00 ≤1.2 ≤0.3 647 23.18
M6-250 63.0±0.2 29.00 8.44 16.5±0.15 3.8±0.1 1.5+0.05 0.95±0.1 8.21 3.50 ≤1.2 ≤0.3 1074 23.28
M7-315 69.0±0.2 29.50 6.52 18.5±0.15 4.0±0.1 1.6+0.05 1.00±0.1 9.21 3.80 ≤1.2 ≤0.3 1213 25.97

 

Item Standard
Average particle size 15~30um
Total translucency 35W≥92%
70W≥93%
150W over≥94%
Impurity Fe ≤10ppm
Ca ≤20ppm
Si ≤25ppm
K ≤5ppm
Na ≤5ppm
 

Electric arc tube for ceramic metal halide lamp

Our electric arc tube are made from our own PCA tube with high quality electrodes of niobium tube or niobium wire by special equipments. The PCA is independently developed and produced by our company. We use pills from US and Korea. The electrodes, pills and solder rings are through purification treatment in vacuum before packaging. The pressure of arc tube is controlled within ±5 volts. The color temperature is controlled within  ±200K. Our arc tube is with many advantages such as high stability of tube pressure, low luminous decay and long life. We can supply the following types and other special types according to the requirement.

Type Watt
(W)
Lamp Current
(A) 
Rated Luminous Flux
(Lm)
Color rendering index
(Ra) 
Color temperature
(K)
Average Life
(H)
70W/830 70 0.98 6300 ≥85 3000 15000
70W/940 70 0.98 6100 ≥90 4200 15000
100W/830 100 1.2 9000 ≥85 3000 15000
100W/940 100 1.2 8880 ≥90 4200 15000
150W/830 150 1.8 15000 ≥85 3000 15000
150W/940 150 1.8 13500 ≥90 4200 15000
250W/830 250 3.0 25000 ≥85 3000 15000
250W/940 250 3.0 23000 ≥90 4200 15000
315W/830 315 3.15 35000 ≥85 3000 15000
315W/940 315 3.15 33000 ≥90 4200 15000
 

PCA tube for making high pressure sodium lamp

It is the extremely pure sintered aluminum oxide ceramic tube with an exceptional degree of translucency. This discharge tube is made of high temperature alumina (α-Al2O3). They are used in making translucent ceramic electric arc tubes for high pressure sodium lamps (HPS lamp) which are in high demand as an energy efficient light source mostly used for street lighting as well as industrial use.

 

Properties

Unit

Data

α-Al2O3 Content

%

99.9

Volume Density

g/cm³

3.96

Linear Exp. Coefficient

×10-6mm/°C

6.5-8

Dielectric Constant

IMHz

10.3

Breakdown Strength

KV/mm

64

Resistivity

Ω·cm

4.5×1015

Fracture Strength

MPa

350

Transmittivity

%

95

 

Separate PCA tube for making high pressure sodium lamp of niobium wire series (FTW type)

Measuring unit: mm
Type Φ Φ1 Φ2 L L1 D
NG35W 3.25 0.85 3.2 44 2.0 0.6
NG50W 3.25 0.85 3.2 52 2.0 0.6
NG70W 4.0 0.85 3.95 55 2.0 0.6
NG100W 4.0

5.0

0.85 3.95

4.95

62.5

62

2.0 0.6
NG150W 5.0 0.85 4.95 70 2.0 0.6
NG210W 6.4 0.85 6.3 72 2.0 0.7
NG250W 6.4

6.8

0.85 6.3

6.7

82

90

2.0 0.7
NG360W 7.1 0.85 7.0 102 2.0 0.7
NG400W 7.1 0.85 7.0 115 2.0 0.7
NG600W 7.1

7.8

8.8

0.85 7.0

7.7

8.7

162

162

150

2.0 0.75
NG1000W 9.6 1.05 9.5 184 2.0 0.75
LU35W 4.0 0.85 3.95 40 2.0 0.6
LU50W 4.0 0.85 3.95 44 2.0 0.6
LU70W 4.0 0.85 3.95 51

55

2.0 0.6
LU100W 5.0 0.85 4.95 51

58

2.0 0.6
LU150W 5.0

6.3

0.85 6.2 68.8

58

2.0 0.6
LU1000W 7.45 1.05 7.35 210

230

2.0 0.75
Tolerance +

-

0.1 0.3 - 0.5 0.1 0.1
0.1 0.3 - 0.5 0.1 0.1
Separate PCA tube for making high pressure sodium lamp of niobium tube series (FTT type)

Measuring unit: mm
Type Φ Φ1 Φ2 Φ3 L L1 L2 D
NG35W 4.0 3.95 5.5 2.1 40 4.0 2.5 0.6
NG50W 4.0 3.95 5.5 2.1 44 4.0 2.5 0.6
NG70W 4.0 3.95 5.5 2.1 55 4.0 2.5 0.6
NG100W 4.0

5.0

3.95

4.95

5.5

6.5

2.1 62.5

60

4.0 2.5 0.6
NG150W 5.0 4.95 6.5 2.1 70 5.0 2.8 0.6
NG210W 6.4 6.3 7.8 3.1 72 5.0 2.8 0.7
NG250W 6.4

6.8

6.3

6.7

7.8

8.3

3.1 82

90

5.0 2.8 0.7
NG360W 7.1 7.0 8.5 3.1 102 5.0 2.8 0.7
NG400W 7.1 7.0 8.5 3.1

4.1

115 5.0 2.8 0.7
NG600W 7.1

7.8

8.8

7.0

7.7

8.7

8.6

9.3

10.3

3.1

4.1

162

162

150

5.0 2.8 0.7
NG1000W 9.6 9.5 11.1 4.1 180 5.0 3.0 0.75
LU35W 4.0 3.95 5.5 2.1 40 4.0 2.5 0.6
LU50W 4.0 3.95 5.5 2.1 44 4.0 2.5 0.6
LU70W 4.0 3.95 5.5 2.1 51

55

4.0 2.5 0.6
LU100W 5.0 4.95 6.5 2.1

3.1

51 4.0 2.5 0.6
LU150W 6.3 6.2 7.5 2.1

3.1

58

62

4.0 2.5 0.6
LU1000W 7.45 7.35 8.95 4.1 210

230

5.0 3.0 0.75
Tolerance +

-

0.1   0.2 0.05 0.5 0.1 0.25 0.1
0.1   0.2 0.05 0.5 0.1 0.25 0.1
Solid PCA recessed plug tube for making sodium lamp of niobium tube series (ZTT type)

  

Measuring unit: mm

Type watts

1

2

3

4

5

6

7

NG50W

52.2

-

0.60

4.45

- -

3.0

2.1

3.25

NG70W

58.2

-

0.60

5.20

-

-

3.0

2.1

-

0.6

4.00

NG100W

64.8

-

0.60

-

5.20

-

3.0

2.1

-

0.6

4.00

NG150W

74.0

86.2

-

0.60

-

6.20

-

3.0

2.1

3.10

0.6

5.00

NG210W

86.0

- 0.70 - 7.80

8.20

-

3.0

- 3.10 0.6   6.40

6.80

NG250W

92.2

-

0.70

-

8.20

-

4.5

-

3.10

0.6

6.80

NG400W

117.2

-

0.70

-

8.60

-

4.5

-

3.10

4.10

0.6

7.10

NG600W

-

142.0

162.0

0.75

- - 10.3

9.30

4.5

-

4.10

0.6

8.80

7.80

NG1000W

- 180.0

184.0

0.75 - - 11.1

12.3

4.5 -

4.10

0.6

9.60

10.8

LU35W 43.2 -

0.65

- 5.30 - 3.0 2.1 - 0.6 4.00
LU50W 44.4 -

0.65

- 5.30 - 3.0 2.1 - 0.6 4.00
LU70W 52.5 -

0.65

- 5.30 - 3.0 2.1 - 0.6 4.00
LU100W 58.0 -

0.70

- 6.40 - 4.5 - 3.10 0.6 4.80
LU150W 68.8 -

0.70

- 6.40 - 4.5 - 3.10 0.6 4.80
LU1000W - 210

230

0.75 - - 8.95 4.5 - 4.10 0.6 7.45 

Tolerance

+

-

1.0

2.0

0.05

0.10

0.15

0.35

0.1

0.04

0.05

0.3

0.1

1.0

2.0

0.05

0.10

0.15

0.35

0.1

0.04

0.05

0.3

0.1

We can supply special type according to customer requirement
 

Electric arc tube for making high pressure sodium lamp

Our electric arc tube are made from our PCA tube of type FTW, FTT and ZTT with high quality electrodes of columbium tube or columbium wire by special equipments. They are the main components in HPS lamp.  The arc tube has a high pressure inside for higher efficiency. Sodium, mercury and xenon are usually used inside the arc tube. The arc tube is made of aluminum oxide ceramic which is resistant to the corrosive effects of alkalis like sodium. We can supply European standard and American standard and the other special types according to the requirement.

 

Type Watt
(W)
Power Voltage
(V)
Lamp Voltage
(V)
Lamp Current
(A) 
Rated Luminous Flux
(Lm)
Average Life
(H)
NG35 35 220 85±20 0.53 2250 16000
NG50 50 220 85±20 0.76 3600 16000
NG70 70 220 90±20 0.98 6000 16000
NG100 100 220 100±20 1.20 8500 16000
NG150 150 220 100±20 1.80 16000 16000
NG250 250 220 100±20 3.00 28000 24000
NG400 400 220 100±20 4.60 48000 24000
NG600 600 220 110±20 6.10 72000 14000
NG1000 1000 220 110±20 10.30 130000 14000
LU35 35 120 52±8 0.83 2250 16000
LU50 50 120 52±8 1.18 4000 16000
LU70 70 120 55±10 1.60 6300 16000
LU100 100 120 55±10 2.10 9500 16000
LU150 150 120 55±10 3.20 16000 16000
LU250 250 120 100±10 3.00 28000 24000
LU400 400 120 100±10 4.60 48000 24000
LU1000 1000 480 250±10 4.70 140000 16000
NG-European standard; LU: American standard

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ICP05008865