Coating Materials

Various types of optical coatings are needed e.g. in AR, for mirrors, or filters. Specifications can be crucially demanding, with tight spectral tolerances, low defect densities, and high durability requirements. To develop your coating production, our consistent "High-Purity" materials can be produced on your demand.

Optical Properties of Major Coating Materials (Evaporation)

Low refractive index material

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Refractive index	Product name	Chemical formula	Transmittance range(㎛)	MP (℃)	BP (℃)	Density (g/cm3)	Stress	Evaporation source	Granule	Pellet
1.34	Natrium fluoride	NaF	0.25-10	993	1695	2.56	-	E	○	-
1.35	Cryolite	Na₃AlF₆	0.2-10	1000	-	2.9	T+	M,T,E	○	-
1.36	Lithium fluoride	LiF	0.15-7	848	1676	2.64	T+	M,E	○	-
1.38	Magnesium fluoride	MgF₂	0.2-5	1248	2260	3.18	T+++	W,M,T,E	○	○
1.40	Aluminium fluoride	AlF₃	0.2-20	1290	（sublimation）	2.88	T+	E	○	-
1.40	Calcium fluoride	CaF₂	0.15-10	1373	2500	3.18	-	W,T,E	○	○
1.40	Strontium fluoride	SrF₂	-	1190	2460	4.2	-	E	○	-
1.45	Zirconium fluoride	ZrF₄	4-12	-	sublimes at 600℃	4.43	-	E	○	-
1.47	Silicon dioxide	SiO₂	0.2-10	1710℃(softening point)	-	2.2	C+++	E	○	○
1.48	Barium fluoride	BaF₂	0.15-13	1354	2260	4.83	-	E	○	○
1.49	Yttrium fluoride	YF₃	-	1152	2230	-	-	E	○	-

Stress

C：Compressive stress
T：Tensile stress
+：Weak
++：Medium
++：Medium
+++：Strong

Evaporation source

E：E-gun
W：Tungsten boat
M：Molybdenum boat
T：Tantalum boat

Medium refractive index material

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tablet lying down.

Refractive index	Product name	Chemical formula	Transmittance range(㎛)	MP (℃)	BP (℃)	Density (g/cm3)	Stress	Evaporation source	Granule	Pellet
1.50	Germanium oxide	GeO₂	-	1116	1250℃ and over	4.2	-	W,M,T,E	○	-
1.50	OL-B	SiO₂+Al₂O₃	0.4-7	-	-	-	T+	E	○	○
1.59	Lanthanum fluoride	LaF₃	0.2-12	1493	2327	5.94	T+	E	○	-
1.60	Neodymium fluoride	NdF₃	0.2-2	1374	2327	6.51	T+	E	○	-
1.62	Gadolinium fluoride	GdF₃	0.2-8	1231	2277	-	T+	E	○	-
1.63	Cerium fluoride	CeF₃	0.3-10	1460	2300	6.16	T++	M,T,E	○	-
1.64	Aluminium oxide	Al₂O₃	0.2-7	2055	2980	4	T++	E	○	-
1.70	Tungsten oxide	WO₃	-	1473	1750	7.16	7.16	W,P,E	○	○
1.72	Magnesium oxide	MgO	0.2-7	2852	3600	3.58	T+	E	○	-
1.75	Lead fluoride	PbF₂	0.3-15	855	1290	8.24	-	W,E	○	-
1.80	Silicon monoxide	SiO	0.6-10	1700℃ and over	-	2.24	T/C	M,T,E	○	○
1.84	Lanthanum oxide	La₂O₃	0.3-8	2187-2300	-	6.51	-	E	○	-
1.88	Yttrium oxide	Y₂O₃	0.3-8	2356-2435	-	5.01	C+++	E	○	○
1.89	Scandium oxide	Sc₂O₃	0.3-8	2383-2423	-	3.86	-	E	○	-
1.90	Molybdenum oxide	MoO₃	-	795	1155	4.7	-	E,M	○	-
1.90	Samarium fluoride	SmF₃	-	1306	2427	7.1	T+	E	○	-
1.92	Praseodymium oxide	Pr₆O₁₁	0.3-10	-	-	-	-	W,E	○	-

Stress

C：Compressive stress
T：Tensile stress
+：Weak
++：Medium
++：Medium
+++：Strong

Evaporation source

E：E-gun
W：Tungsten boat
M：Molybdenum boat
T：Tantalum boat

High refractive index material

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tablet lying down.

Refractive index	Product name	Chemical formula	Transmittance range(㎛)	MP (℃)	BP (℃)	Density (g/cm3)	Stress	Evaporation source	Granule	Pellet
2.00	Indium oxide	In₂O₃	0.4-0.7	decomposes at 700℃	-	7.18	-	W,T,M.E	○	○
2.00	Tin oxide	SnO₂	-	1127	sublimes at approx. 1850℃	-	-	W,E	○	○
2.05	Hafnium oxide	HfO₂	0.25-5	2758	-	9.68	T++	E	○	-
2.05	Tantalum pentoxide	Ta₂O₅	0.3-10	-	decomposes at 1470℃	7.3-8.2	T++	E	-	○
2.05	Zirconium dioxide	ZrO₂	0.3-7	2700	4300	5.49	T+	E	○	○
2.10	Antimony trioxide	Sb₂O₃	0.3-1	656	1425	5.2	-	E	○	-
2.10	Zinc oxide	ZnO	0.3-8	-	sublimes at 1720℃	5.61	-	E	○	○
2.13	Cerium dioxide	CeO₂	0.4-7	2600	(sublimation)	7.13	C+	W,E	-	-
2.13	OS-5	ZrO₂+TiO₂	0.4-7	-	1250℃ and over	4.5	T+	E	○	○
2.15	OH-40	TiO₂+La₂O₃	0.35-8	-	1250℃ and over	-	T+	E	○	-
2.15	Neodymium oxide	Nd₂O₃	0.2-2	2192-2310	1250℃ and over	7.24	-	E	○	-
2.20	Niobium pentoxide	Nb₂O₅	-	1520	1250℃ and over	4.3-5.2	T+	E	○	-
2.24	Chromium oxide	Cr₂O₃	0.6-8	2435	4000	5.21	-	W,E	○	○
2.30	Zinc sulfide	ZnS	0.4-15	1800-1900	sublimes at 1180℃	4.09	C++	M,E	○	-
2.35	Dititanium trioxide	Ti₂O₃	0.4-10	-	decomposes at 2130℃	4.6	T+++	W,E	○	○
2.35	Trititanium pentoxide	Ti₃O₅	0.4-10	-	1250℃ and over	4.2	T+++	W,E	○	○
2.35	Titanium monoxide	TiO	0.4-10	1750	3000℃ and over	4.93	T+++	W,E	○	-
2.35	Titanium dioxide	TiO	0.4-10	1825	decomposes at 3000℃ and over	4.17	T+++	E	○	○
3.4(2μm)	Silicon	Si	0.9-10	1414	2642	2.34	T++	W,E	○	-
4.4(2μm)	Germanium	Ge	1.5-4	959	2691	5.4	-	W,M,T,E	○	-

Stress

C：Compressive stress
T：Tensile stress
+：Weak
++：Medium
++：Medium
+++：Strong

Evaporation source

E：E-gun
W：Tungsten boat
M：Molybdenum boat
T：Tantalum boat

Metal

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tablet lying down.

Refractive index	Product name	Chemical formula	Transmittance range(㎛)	MP (℃)	BP (℃)	Density (g/cm3)	Stress	Evaporation source	Granule	Pellet
-	Silver	Ag	-	962	2184	10.5	T+	M,T,E	○	-
-	Aluminum	Al	-	659	2270	2.7	-	W,E	○	-
-	Gold	Au	-	1063	2710	19.3	T+	W,M,E	○	-
-	Chromium	Cr	-	1890	2212	7.2	T++	W,E	○	-
-	Copper	Cu	-	1085	2580	8.93	T+	W,M,T,E	○	-
-	Hafnium	Hf	-	1700	-	13.3	-	E	○	-
-	Indium	In	-	156	2100	7.3	-	W,M,E	○	-
-	Molybdenum	Mo	-	2610	4800	10.2	T++	10.5	○	-
-	Nickel	Ni	-	1455	2721	8.85	T++	W,E	○	-
-	Platinum	Pt	-	1773	3800	21.4	T++	W,E	○	-
-	Tantalum	Ta	-	2996	5300	16.6	-	E	○	-
-	Titanium	Ti	-	1675	3262	4.54	C/T+	W,T,E	○	-
-	Tungsten	W	-	3387	5900	19.1	-	E	○	-

Stress

C：Compressive stress
T：Tensile stress
+：Weak
++：Medium
++：Medium
+++：Strong

Evaporation source

E：E-gun
W：Tungsten boat
M：Molybdenum boat
T：Tantalum boat

Functional material

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tablet lying down.

Refractive index	Product name	Chemical formula	Transmittance range(㎛)	MP (℃)	BP (℃)	Density (g/cm3)	Stress	Evaporation source	Granule	Pellet
-	ITO	In₂O₃+SnO₂	0.4-7	Transparent conductive film	-	-	-	E	○	-
-	MS-DC100	-	-	Water repellent material	-	-	-	W,M,T,E	-	○
-	MS-SY	-	-	Super Hydrophobic material	-	-	-	W,M,T,E	-	○

Stress

C：Compressive stress
T：Tensile stress
+：Weak
++：Medium
++：Medium
+++：Strong

Evaporation source

E：E-gun
W：Tungsten boat
M：Molybdenum boat
T：Tantalum boat