Grocera Porcelain

GROUP

Gc. Alumina porcelain

Product code

Gc-30

Gc- 30+

Gc-50

Gc-50+

FEATURE OF COMPOSITION

30%

; 50%

50 %

APPLICATION RANGE

L.V. and H.V.
insulation , good mechanical properties, suited for small middle and large-sized insulators.

suitable for complicated pressed pieces & Resistors and rheostats.

Chemical porcelain ,H.V. insulation, high mechanical strength, good thermal shock resistance.

excellent mechanical ,wear and thermal properties,

PROPERTIES

COLOUR		White	Special Purpose White	White	Grey	White / Grey
POROSITY (Vol. %)		0	0	0	0	0
BULK DENSITY (g/cm2)		2.30	2.40	2.50	2.50	2.70
HARDNESS (Mohs Scale)		7 to 8	7 to 8	7 to 8	7 to 8	7 to 8
FLEXURAL STRENGTH (N/mm2)	Unglazed	60	40	100	100	140
FLEXURAL STRENGTH (N/mm2)	Glazed	70	50	120	120	160

THERMAL EXPANSION LINER COEFFICENT (10-6K-1)	a20 – 1000c	4.15	4.15	4.90	4.90	5.60
	a20 – 3000c	4.50	3.90	4.75	4.75	5.35
	a20 – 6000c	4.55	4.60	5.95	5.95	6.45

THERMAL SHOCK RESISTANCEMIN. (K)		150	150	150	150	150

THERMAL CONDUCTIVITY (20-100C)		2.0	2.0	2.5	2.5	2.8





VOLUME RESISTIVITY IN TERMS OF TEMPERATUR E (D.C.)cm	200C	1013	1012	1013	1013	1013
	2000C	108	108	108	108	108
	6000C	104	104	104	104	104